Steering lock system

·If normal operation is not possible in a specific place or time period, check that it is not being affected by any external electromagnetic waves.
·If you experience problems after installing equipment such as new parts installed by the dealer, please confirm that that part is not affecting the vehicle by emitting electromagnetic waves.

Symptoms	Inspection items	Reference pages
The steering lock does not operate.	Refer to the “Steering lock does not operate” symptom-specific flow chart.
The steering lock cannot be released (cannot start the engine)	Refer to the “Steering lock cannot be released (cannot start the engine)” symptom-specific flow chart.

DESCRIPTION OF FUNCTIONS

1. Unlock operation conditions

(1) Unlock operation will be performed when the following conditions are met.

(a) Key collation is complete.

(b) The vehicle is set to ACC ON or IGN ON.

2. Lock operation conditions.

(1) Lock operation will be performed when the following conditions are met.

(a) The vehicle is set to IG OFF and ACC OFF.

(b) The shifter is in the P position (Transmission A/T).

(d) A genuine collation ECM is confirmed.

3. Indicator display function

(1) When a malfunction that may cause poor steering lock ECM operation, an IG drive circuit malfunction, or vehicle speed information malfunction is detected, the combination meter ASSY orange indicator light identifies the malfunction by blinking.

4. The steering lock actuator ASSY (Steering lock ECM)

(1) The steering lock ECM is integrated into the steering column ASSY steering lock actuator ASSY.

(2) As the steering lock actuator ASSY (Steering lock ECM) is not connected to CAN communication, CAN communication with external parts is performed via the LIN communication-connected smart key computer ASSY (Collation ECM).

HOW TO TROUBLESHOOT

1. Bring in the car

Next▼

2. Interview and phenomenon check

Next▼

3. Basic inspection

(1) Check the battery voltage.

Voltage : 11 to 14 V

·By sounding the horn, it is easy to check whether the battery is flat.
·If the battery voltage is less than 11 V, please recharge or replace it.

(2) Inspect any parts that can be checked visually such as blown fuses, wiring harness open circuit, short circuits, or poor connector contacts.

Next▼

4. CAN communication system functionality check

(1) Inspect the CAN communication system. (Refer to

)

>Progress to “CAN communication system (How to troubleshoot)” (Refer to

Result	Go to
No diagnosis code output (ECM not connected, CAN communication malfunction, and ECM communication malfunction/interruption).	A
Diagnosis code output (ECM not connected, CAN communication malfunction, or ECM communication malfunction/interruption).	B

)

A▼

5. Diagnosis code check

(1) Use the SSM3 to check and record the diagnosis codes. (Refer to

)

Result	Go to
No diagnosis code output (Able to check or recreate the trouble phenomenon)	A
No diagnosis code output (Unable to check or recreate the trouble phenomenon)	B
Diagnosis code output (Steering lock system malfunction)	C

·When a steering lock system diagnosis code is output, please refer to the list of diagnosis codes (

).
·The steering lock actuator ASSY (Steering lock ECM) does not store past diagnostics.

>Conduct a malfunction simulation (Refer to

)

>Progress to the “list of diagnostic codes”. (Refer to

)

A▼

6. Symptom table

(1) Check whether the trouble phenomenon applies to the items listed in the symptom table. (For the symptom table, please refer to

7. Based on the trouble phenomenon, use the following methods to perform troubleshooting

Result	Go to
Does not apply to items in the symptom table.	A
Applies to an item in the symptom table.	B

>Go to Step 8.

A▼

(1) Current data display & save / work support (Refer to

)

(2) ECM terminal arrangement (Refer to

)

Next▼

8. Adjustment, repair, or replacement

Next▼

9. Diagnosis codes recheck

(1) Using SSM3, clear the diagnostic code. (Refer to

)

(2) Recheck the diagnosis codes (Refer to

)

NOTE:

Check the output for each diagnosis code. (Refer to

)

>Progress to the “list of diagnostic codes”. (Refer to

Result	Go to
No diagnosis code output.	A
Diagnosis code output (Steering lock system malfunction)	B

)

A▼

Complete

CHECKING / CLEARING DIAGNOSTIC CODES

1. Reading diagnosis codes (Main body ECM (network gateway computer))

(1) Connect the SSM3 to the DLC3 and turn the ignition to IG ON.

(2) Through the SSM3 display, select [Each System Check]→[Keyless Access System]→[Collation ECM]→[Diagnostic Code(s) Display] to check the diagnosis codes.

2. Reading the diagnosis codes (Smart key computer ASSY (collation ECM)).

(1) Connect the SSM3 to the DLC3 and turn the ignition to IG ON.

(2) Through the SSM3 display, select [Each System Check]→[Keyless Access System]→[Collation ECM]→[Diagnostic Code(s) Display] to check the diagnosis codes.

CAUTION:

·As the steering lock actuator ASSY (Steering lock ECM) does not store past diagnostics, when diagnosis codes are output, do not turn the ignition to IG OFF or perform any deletions until diagnosis code checking and recording is completely finished.
·As there may be storage of diagnosis codes that were initiated due to trouble with a system other than with the steering lock actuator ASSY (steering lock ECM) system, please also check and record diagnosis codes for other systems.

3. Deletion of recorded diagnosis codes

(1) Connect the SSM3 to the DLC3 and turn the ignition to IG ON.

(2) Select [Deletion] from the SSM3 [Clear Memory] screen and follow the on-screen procedure to delete diagnosis codes.

DIAGNOSIS SYSTEM

1. Diagnosis functions

(1) The steering lock actuator ASSY (Steering lock ECM) outputs any self-diagnosis error as a diagnosis code when an error occurs in the system. This code is able to be read with the SSM3.

CAUTION:

(2) As the steering lock actuator ASSY (Steering lock ECM) is not connected to CAN communication, communication with external parts is performed via the LIN communication-connected smart key computer ASSY (Collation ECM).

(3) The steering lock actuator ASSY (Steering lock ECM) only outputs the current error as a diagnosis code, and does not store past diagnostics.

CIRCUIT FIGURE

ECM TERMINAL ARRANGEMENT

1. Steering lock actuator ASSY (Steering lock ECM)

(1) Measure the voltage, resistance, and waveform.

Terminal No. (Terminal symbol)	Input/Output	Terminal description	Inspection conditions	Standard value	Related data monitor
D59-1 (GND) ←→ Chassis ground	-	GND	Always	Less than 1 Ω	-
D59-3 (SLR+) ←→ D59-1 (GND)	Input	Steering lock motor drive permission signal	When all of the following conditions are met and the doors are closed → open, the steering lock motor is driven. ·The steering lock is unlocked ·IG & ACC OFF ·The shifter is in the P position (Transmission A/T)	Pulse generation (waveform 1)	Check ·Motor power supply short circuit history ·Unlock request reception state ·Lock request reception state
D59-4 (SLP) ←→ D59-1 (GND)	Output	Steering lock bar position	Steering lock → Steering unlock	11 to 14 V → 1.2 V or less	Check ·Push button start malfunction history ·Sensor malfunction history (Steering lock)
D59-5 (LIN) ←→ D59-1 (GND)	Input/Output	LIN communication line	-	-	Check ·Communication allowed state (Steering lock)
D59-6 (IGN1) ←→ D59-1 (GND)	Input	IG2 input power supply	IG OFF → IG ON	Less than 1 V → 11 to 14 V	Check ·IG SW
D59-7 (B) ←→ Chassis ground	Input	Power supply	Always	11 to 14 V	-

The steering lock actuator ASSY (Steering lock ECM) is incorporated with one motor and two sensors.

·When performing measurements while the steering lock actuator motor is stopped, measurements can be made without any special operation.
·When performing measurements while the steering lock actuator motor is running, the following operations are necessary.

·To unlock the steering, bring the electrical key transmitter SUB-ASSY (Electronic key) into the vehicle and turn the ignition to ACC ON or IG ON.
·To lock the steering, open a door while the vehicle is set to IG OFF & ACC OFF, and the shifter is in the P position (Transmission A/T).

(2) Oscilloscope waveform.

(a) Waveform 1

Item	Contents
Measuring terminal	D59-3 (SLR+) ←→ D59-1 (GND)
Equipment setting	2 V/DIV, 200 ms/DIV
Measuring condition	Steering lock actuator motor stopped → Steering lock actuator motor running → Steering lock actuator motor stopped

CURRENT DATA DISPLAY & SAVE / WORK SUPPORT

*a	Steering lock actuator motor stopped
*b	Steering lock actuator motor running

As the steering lock actuator ASSY (Steering lock ECM) carries out data communication with the SSM3 via the CAN communication function of the smart key computer ASSY (Collation ECM), it cannot perform normal monitoring of there is a CAN communication or smart key computer ASSY (Collation ECM) malfunction.

1. Data monitor

The SSM3 can be used to read the input to the steering lock actuator ASSY (Steering lock ECM), communication, and operating conditions.

(1) Use the SSM3 to judge whether a component is working or not, and to narrow down the location of trouble with the data monitor.

SSM3 screen: [Each System Check] → [Keyless Access System] → [Power Supply ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[Shift lever P switch signal] *1	Shift position (P) state Display range: ON/OFF	ON: In shift position P OFF: Not in shift position P	Used for determining the presence of a shift switch (P) failure.
[Steering unlock SW]	Indicates the steering unlock sensor signal output from the steering lock actuator ASSY (Steering lock ECM). Display range: ON/OFF	ON: Steering unlock OFF: Steering lock	·The steering will be locked when any door is opened (or closed) while the vehicle is set to IG OFF and the shifter is in the P position (Transmission A/T). ·The steering will be unlocked when the electrical key transmitter SUB-ASSY (Electronic key) is inside the vehicle and the vehicle is set to ACC ON or IG ON. ·The engine cannot be started when the steering unlock signal is OFF.
[Steering lock unlock wait time-out]	Steering lock unlock malfunction Display range: Yes/No	Yes: Unlocking malfunction (For example: When the lock bar is stuck, etc.) No: Unlocking normal	When the engine cannot be started due to a steering lock unlocking malfunction, “Yes” is displayed.

*1: Transmission A/T.

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[Ignition]	Indicates the IG power supply input state of the smart key computer ASSY (Collation ECM). Display range: ON/OFF	ON: IG ON OFF: IG OFF	When it is in the ACC ON state, “OFF” is displayed.
Immobiliser*1	State of immobiliser system determined by certification ECU (smart key ECU assembly) / Set or Unset	Unset: Engine immobiliser unset Set: Engine immobiliser set	·When the immobiliser cannot be unset, this item can be used to determine whether the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is part of the problem. ·The engine cannot be started when this item displays "Set"
Immobiliser*2	State of immobiliser system determined by certification ECU (smart key ECU assembly) / Set or Unset	Unset: Engine immobiliser unset Set: Engine immobiliser set	·When the immobiliser cannot be unset, this item can be used to determine whether the certification ECU (smart key ECU assembly) is part of the problem. ·The engine cannot be started when this item displays "Set"
[Sleep possible status]	Indicates the steering lock ECM sleep permission state. Display range: Yes/No	Yes: Sleep permitted No: Sleep not permitted	-
[Wake-up transmission status]	Indicates the steering lock ECM wake-up signal communication state. Display range: Yes/No	Yes: Wake-up signal transmission No: No wake-up signal transmission	-
[Lock confirmation]	Indicates the lock confirmation state of the steering lock actuator ASSY (Steering lock ECM). Display range: Set/Unset	Set: Lock confirmed UnSet: Lock not confirmed	”The steering is not locked when “Unset” is displayed.
[Unlock confirmation]	Indicates the unlock confirmation state of the steering lock actuator ASSY (Steering lock ECM). Display range: Set/Unset	Set: Unlock confirmed Unset: Unlock not confirmed	”The steering is not unlocked when “Unset” is displayed. (The engine cannot be started.)
[Motor operation prohibition voltage evaluation]	Indicates the state of the engine start permission signal sent to the smart key computer ASSY (Collation ECM) after judgment by the steering actuator ASSY (Steering lock ECM). Display range: OK/NG	OK: Engine start permitted NG: Engine start prohibited	·When this item displays “OK”, the smart key computer ASSY (Collation ECM) receives an unlock confirmation signal from the steering lock actuator ASSY (Steering lock ECM), sending the engine start permission signal. ·The engine cannot be started when this item displays “NG”.
[Sensor abnormal (past)]	Indicates any history of steering lock actuator ASSY (Steering lock ECM) internal position sensor malfunction. Display range: NG/OK	NG: There is a history of the steering lock actuator ASSY (Steering lock ECM) internal lock/unlock sensors both being in an ON state at the same time (usually they are not both ON). OK: There is no history of steering lock actuator ASSY (Steering lock ECM) internal lock/unlock sensor malfunction.	When this item displays “NG”, there may be a steering lock actuator ASSY internal position sensor malfunction, or mechanical fault.
[Motor power supply short-circuit abnormal (past)]	Indicates the malfunction (short circuit) history for the signal sent to the steering lock actuator ASSY (Steering lock ECM) signal from the smart key computer ASSY (Collation ECM). Display range: NG/OK	NG: Motor power supply short circuit history present OK: No motor power supply short circuit history	This item indicates the history of when there is a circuit malfunction between the smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM).
[Motor driver short-circuit abnormal (past)]	Indicates any history of steering lock actuator ASSY (Steering lock ECM) internal motor drive circuit malfunctions (short circuit). (Diagnostic code B2781 is output) Display range: NG/OK	NG: Motor driver short circuit history present OK: No motor driver short circuit history present	This item identifies any malfunction in the steering lock actuator ASSY (Steering lock ECM) internal steering lock motor drive circuit.
[Steering lock lock/unlock command reception history]	Indicates the unlock request signal reception history. Display range: NG(Past)/OK	Yes: Unlock request signal reception history present No: No unlock request signal reception history	-
[Lock bar engagement abnormal]	Indicates the history of not being able to correctly unlock the steering after the steering lock bar is moved to the unlock position for a certain period of time. Display range: NG(Past)/OK	NG(Past): History of the lock bar being stuck OK: No history of the lock bar being stuck	-
[Push start abnormal (past)]	Indicates any history of a push button start malfunction caused by the steering lock actuator ASSY (Steering lock ECM). Display range: NG/OK	NG: Push button start malfunction history present OK: No push button start malfunction history	-
[EEPROM access abnormal]	Indicates the steering lock ECM state. Display range: NG/OK	NG: Steering lock ECM malfunction OK: Steering lock ECM normal	-
[Engine start permission request reception status]	Indicates the reception state of the engine start permission signal sent to the smart key computer ASSY (Collation ECM) after judgment by the steering lock actuator ASSY (Steering lock ECM). Display range: NG/OK	NG: When it is not yet received OK: When it has already been received	·When “OK” is displayed, the smart key computer ASSY (Collation ECM) receives an unlock confirmation signal from the steering lock actuator ASSY (Steering lock ECM), allowing engine fuel injection and ignition. ·The engine cannot be started when this item displays “NG”.
[L Code Check]	Indicates the collation results between the smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM). Display range: NG/OK	NG: Collation results abnormal OK: Collation results normal	·The smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM) are unable to perform L code registration. ·Steering lock cannot be performed. ·Steering unlock cannot be performed. (The engine cannot be started.)
[Steering lock lock/unlock command reception history]	Indicates the unlock request signal reception state. Display range: NG(Past)/OK	NG(Past): IG ON, ACC ON or engine start operation not performed OK: Within 10 seconds after IG ON, ACC ON or engine start operation	·The engine cannot be started when the unlock request signal cannot be received. ·If “OK” is not displayed even if the steering unlock conditions are satisfied, there may be a smart key computer ASSY (Collation ECM) malfunction.
[Steering lock lock request reception status]	Indicates the lock request signal reception state. Display range: OK/NG(Past)	OK: When a lock request is received within 10 seconds after any one of the doors is opened while the shifter is in the P position (Transmission A/T) and the vehicle ignition is turned to IG OFF. NG(Past): Other than the above	If “OK” is not displayed even if the steering lock conditions are satisfied, there may be a smart key computer ASSY (Collation ECM) malfunction.
[L Code Check(Past)]	Indicates the collation results history from between the smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM). Display range: NG/OK	NG: There is a history of a abnormal collation results OK: There is no history of a abnormal collation results	-
[Number of Diagnostic Code(s):]	Indicates the number of diagnostic codes. Display range: 0 - 255 items	-	-

1. When the following conditions are satisfied, the steering lock will be unlocked.

·The vehicle is set to ACC ON or IGN ON.

·When the push button start switch is operated and the vehicle is set to ACC ON or IG ON, the electrical key transmitter SUB-ASSY (Electronic key) and the smart key computer ASSY (Collation ECM) are matched and the steering will be unlocked.
·The electrical key transmitter SUB-ASSY (Electronic key) will be checked if any of the following conditions are met.
·The brake pedal (Transmission A/T) or the clutch pedal (Transmission M/T) are depressed and the engine is started.
·Within 30 seconds after a door has been opened and closed.
·The push button start switch is pressed.

·Key collation: When there is a match between the code transmitted by the electrical key transmitter SUB-ASSY (Electronic key) and the code calculated by the smart key computer ASSY (Collation ECM).
·A genuine collation ECM is confirmed: Checking of the L code issued when the engine is started or the push button start switch is pressed.
·The steering lock actuator ASSY (Steering lock ECM) uses L codes to check whether the smart key computer ASSY (Collation ECM) is a genuine ECM.

2. If the following conditions are satisfied, the steering will be locked when the smart key computer ASSY (Collation ECM) has been confirmed to be a genuine ECM.

·The vehicle is stopped
·No malfunction for the vehicle signal
·The vehicle is set to IG OFF and ACC OFF.
·The shifter is in the P position (Transmission A/T).
·A door changes from closed → open, or a door is locked (smart door lock, wireless door lock).

The following example, indicates the data monitor activity when the vehicle changes from ACC ON → IG ON → IG OFF while the shifter is in the P position (Transmission A/T) and the brake pedal (Transmission A/T) or the clutch pedal (Transmission M/T) are not depressed.

Enter the vehicle while carrying the electrical key transmitter SUB-ASSY (Electronic key), set the ignition to IG OFF and put the shifter in the P position (Transmission A/T), and perform the following operations to check each data monitor activity.

*1: Without depressing the brake pedal (Transmission A/T) or the clutch pedal (Transmission M/T), press the push button start switch and confirm that it changes over to ACC ON.

*2: Without depressing the brake pedal (Transmission A/T) or the clutch pedal (Transmission M/T), press the push button start switch and confirm that it changes over to IG ON.

*3: Press the push button start switch and confirm that it changes over to IG OFF.

*4: Open the door. (Steering lock complete)

SSM3 screen: [Each System Check] → [Integ. unit mode] → [Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[D Door Courtesy SW]	State of the driver's door courtesy light switch. Display range: Closed/Open	Closed: Driver's door closed. Open: Driver's door open.	-

DTC	B2781	Steering Lock ECU Open/Short

Circuit description

The steering lock ECM and steering lock motor are integrated into the steering lock actuator ASSY.

The steering lock actuator ASSY (Steering lock ECM) uses the steering lock motor lock position sensor to detect the lock/unlock position.

The steering lock actuator ASSY (Steering lock ECM) is input with a lock/unlock command signal from the smart key computer ASSY (Collation ECM) and returns a lock operation signal.

As the steering lock actuator ASSY (Steering lock ECM) is not connected to CAN communication, CAN communication with external parts is performed via the LIN communication-connected smart key computer ASSY (Collation ECM).

Diagnostic codes	Detecting conditions	Faulty part	Diagnostic code output check operation
B2781	When one of the following conditions are satisfied (1 trip detection 1). ·Steering lock/unlock position detection sensor malfunction. 2 ·Steering lock motor drive circuit short circuit malfunction. ·Steering lock motor drive circuit open malfunction.	·Steering lock actuator ASSY (Steering lock ECM) ·Large-scale multiplex communication system for vehicle body [LIN]	No output verification required (constantly detected)

*1: Detects malfunctions when the vehicle is set to IG ON.
*2: Judged to be a malfunction when both detection switches are ON at the same time.

Vehicle state and fail safe measures during detection

Vehicle state during detection	Fail safe measures during detection
Steering lock, unlock cannot be performed. This means that the engine cannot be started.	Engine starting is prohibited (Does not perform cranking).

Diagnostic codes	Data monitor	Work support
B2781	Check ·Sensor malfunction history (Steering lock) ·Motor driver short circuit history	-

·After repair is completed, perform a diagnostic code output confirmation and check that there is no further output of diagnostic codes.
·When replacing the steering lock actuator ASSY (Steering lock ECM), please check the applicable precautions (Refer to

), and refer to the “Registration manual for immobilizer”.

NOTE:

When all ECMs connected to the collation system LIN bus cannot communicate with the smart key computer ASSY (Collation ECM), diagnostic code B2785 is output.

1. Reading diagnostic codes

(1) Use the SSM3 to confirm that the large-scale multiplex communication system for vehicle body [LIN] diagnostic code B2785 is not being output. (Refer to

)

NOTE:

When a LIN communication error code is output, please check the large-scale multiplex communication system for vehicle body [LIN]. (Refer to

)

>Replacement of the steering lock actuator ASSY (Steering lock ECM) (Refer to

Result	Go to
B2785 (LIN communication malfunction) is output.	A
B2785 (LIN communication malfunction) is not output.	B

)

A▼

Proceed to the “large-scale multiplex communication system for vehicle body [LIN] (B2785 LIN communication error)” (Refer to

)

DTC	B2782	Steering lock power supply circuit malfunction (Smart ECM-side malfunction)

Circuit description

The smart key computer ASSY (Collation ECM) has a built-in power supply ECM function.

This diagnosis code is output when it is judged that there is an error in the SLR+ input that is directly input into the steering lock actuator ASSY (Steering lock ECM) from the smart key computer ASSY (Collation ECM).

Diagnostic codes	Detecting conditions	Faulty part	Diagnostic code output check operation
B2782	When one of the following conditions are satisfied (1 trip detection). ·Steering lock motor drive indicator circuit short circuit malfunction. ·Steering lock motor drive indicator circuit open malfunction. NOTE: When the LIN power supply signal and solid line power supply signals are in disagreement, it is judged to be a relative error.	·Steering lock actuator ASSY (Steering lock ECM) ·Smart key computer ASSY (Collation ECM) ·Wiring harness or connector	Steering lock/unlock operation (When the vehicle is stopped) (Lock: When the door is opened while the shifter is in the P position (Transmission A/T) and the vehicle is set to IG OFF and ACC OFF. Unlock: When the electrical key transmitter SUB-ASSY (Electronic key) is being carried and the vehicle is set to ACC ON or IG ON.)

Vehicle state and fail safe measures during detection

Vehicle state during detection	Fail safe measures during detection
Steering lock, unlock cannot be performed. This means that the engine cannot be started.	Engine starting is prohibited (Does not perform cranking).

Diagnostic codes	Data monitor	Work support
B2782	Check ·Motor power supply short circuit history	Not applicable

·The steering lock system is equipped with functions that use multiplex communication. Firstly, please follow the directions in “How to troubleshoot” and then perform troubleshooting after confirming that there is no malfunction in the communication system.
·After repair is completed, perform a diagnostic code output confirmation and check that there is no further output of diagnostic codes.
·When replacing the steering lock actuator ASSY (Steering lock ECM) or the smart key computer ASSY (Collation ECM), please check the applicable precautions (Refer to

), and refer to the “Registration manual for immobilizer”.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to

)

1. Inspection of the steering lock actuator ASSY (Steering lock ECM)

(1) Disconnect the steering lock actuator ASSY (Steering lock ECM) connector D59.

(2) Measure the resistance between the terminals.

Resistance

Inspection terminals	Inspection conditions	Standard value
D59-1 (GND) - Chassis ground	Always	Less than 1 Ω

(3) Connect the steering lock actuator ASSY (Steering lock ECM) connector D59.

(4) Use an oscilloscope to measure the waveform between the terminals.

Item	Contents
Inspection terminals	D59-3 (SLR+) - D59-1 (GND)
Equipment setting	2 V/DIV, 200 ms/DIV
Inspection conditions	Steering lock actuator motor stopped → Steering lock actuator motor running → Steering lock actuator motor stopped

*a	Connector connected (Steering lock actuator ASSY (Steering lock ECM))
*b	Steering lock actuator motor stopped
*c	Steering lock actuator motor running

·Lock motor stopped: No operation
·Lock motor running:

·Steering unlock:
When the vehicle is stopped, the electrical key transmitter SUB-ASSY (Electronic key) is being carried and the vehicle is set to ACC ON or IG ON.
·Steering lock:
When the vehicle is stopped, any door is opened while the shifter is in the P position (Transmission A/T) and the vehicle is set to IG OFF and ACC OFF.

> Go to Step 4.

2. Deletion of diagnostic code and data monitor error information

(1) Clear the diagnostic code using the SSM3. (Refer to

)

Next▼

3. Reading diagnostic codes and SSM3 data

(1) Use the SSM3 to confirm that diagnostic code B2782 (Power supply ECM malfunction) is not being output. (Refer to

)

Criteria : Diagnostic code B2782 is not being output.

(2) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[Motor power supply short-circuit abnormal (past)]	Indicates the malfunction (short circuit) history for the signal sent to the steering lock actuator ASSY (Steering lock ECM) signal from the smart key computer ASSY (Collation ECM). Display range: NG/OK	NG: Motor power supply short circuit history present OK: No motor power supply short circuit history	This item indicates the history of when there is a circuit malfunction between the smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM).

>Replacement of the steering lock actuator ASSY (Steering lock ECM) (Refer to

Result	Go to
·B2782 (Power supply ECM malfunction) is not output. ·Motor power supply short circuit history is displayed as “OK”.	A
·B2782 (Power supply ECM malfunction) is output. ·Motor power supply short circuit history is displayed as “NG”.	B

)

A▼

Return to normal operation (although a diagnosis code was recorded due to poor connector terminal contacts, the connector may have returned to normal operation after being reconnected)

4. Inspect the wiring harness and connector (Smart key computer ASSY (Collation ECM) - Steering lock actuator ASSY (Steering lock ECM)).

(1) Disconnect the steering lock actuator ASSY (Steering lock ECM) connector D59.

(2) Disconnect the smart key computer ASSY (Collation ECM) connector D41.

(3) Confirm that there is no deformation or corrosion on the connector case and terminal.

Criteria : There is no deformation or corrosion on the connector case and terminal.

(4) Measure the resistance between the terminals.

Resistance

Inspection terminals	Inspection conditions	Standard value
D41-29 (SLR+) - D59-3 (SLR+)	Always	Less than 1 Ω
D59-3 (SLR+) - Chassis ground	Always	10 k Ω or more
D41-29 (SLR+) - Chassis ground	Always	10 k Ω or more

>Repair or replacement of wiring harness or connector

Replacement of the smart key computer ASSY (Collation ECM)

DTC	B2788	IGN2 input malfunction

Circuit description

This diagnosis code is output when the steering lock actuator ASSY (Steering lock ECM) detects an IG2 power supply malfunction.

Diagnostic codes	Detecting conditions	Faulty part	Diagnostic code output check operation
B2788	When a mismatch occurs between the IGN2 input of the steering lock ECM, and both the LIN communication line input and solid line input. (1 trip detection *1)	·GAUGE fuse ·Steering lock actuator ASSY (Steering lock ECM) ·Wiring harness or connector	No output verification required (constantly detected)

*1: Detects malfunctions when the vehicle is set to IG ON.

Vehicle state and fail safe measures during detection

Vehicle state during detection	Fail safe measures during detection
Steering lock, unlock cannot be performed. This means that the engine cannot be started.	-

Diagnostic codes	Data monitor	Work support
B2788	-	-

·Before performing troubleshooting, check the fuse for this circuit.
·The steering lock system is equipped with functions that use multiplex communication. Firstly, please follow the directions in “How to troubleshoot” and then perform troubleshooting after confirming that there is no malfunction in the communication system.
·After repair is completed, perform a diagnostic code output confirmation and check that there is no further output of diagnostic codes.
·When replacing the steering lock actuator ASSY (Steering lock ECM), please check the applicable precautions (Refer to

), and refer to the “Registration manual for immobilizer”.

1. Inspection of the steering lock actuator ASSY (Steering lock ECM)

(1) Disconnect the steering lock actuator ASSY (Steering lock ECM) connector D59.

(2) Measure the resistance between the terminals.

Resistance

Inspection terminals	Inspection conditions	Standard value
D59-1 (GND) - Chassis ground	Always	Less than 1 Ω

(3) Connect the steering lock actuator ASSY (Steering lock ECM) connector D59.

(4) Measure the voltage between the terminals.

Inspection terminals	Inspection conditions	Standard value
D59-6 (IGN1) - D59-1 (GND)	IG ON	11 to 14 V
D59-6 (IGN1) - D59-1 (GND)	IG OFF	Less than 1 V

>Check all wiring harnesses and devices connected to the GAUGE fuse (Refer to

*a	Connector connected (Steering lock actuator ASSY (Steering lock ECM))

)

OK▼

Replacement of the steering lock actuator ASSY (Steering lock ECM) (Refer to

)

The steering lock cannot be released (cannot start the engine) (without ID code box)

Circuit description

The steering lock actuator ASSY (Steering lock ECM) drives the motor that inserts the lock bar into the steering column to lock the steering wheel.

There may be cases where the steering lock bar becomes stuck in the steering column lock hole, causing the steering lock to become unable to be released. In this case, in the same manner as for conventional plate key vehicles, the lock bar can be worked out of the hole by performing the engine start operation while rocking the steering wheel.

When replacing the smart key computer ASSY (Collation ECM), there may be cases where the steering cannot be unlocked or the engine cannot be started unless registration and initializing operation is carried out. (Refer to the “Registration manual for immobilizer”)

Trouble phenomenon	Data monitor	Work support
The steering lock cannot be released (cannot start the engine)	Check ·Steering lock unlock request reception state ·L code check	Not applicable

·Before performing troubleshooting, check the fuse for this circuit.
·The steering lock system is equipped with functions that use multiplex communication. Firstly, please follow the directions in “How to troubleshoot” and then perform troubleshooting after confirming that there is no malfunction in the communication system.
·After repair is completed, confirm that trouble symptoms do not reoccur.
·Confirm that no diagnostic codes are output. (If diagnostic codes are output, firstly perform a diagnostic code flow chart check.)
·When replacing the smart key computer ASSY (Collation ECM) or the steering lock actuator ASSY (Steering lock ECM), please check the applicable precautions (Refer to

), and refer to the “Registration manual for immobilizer”.
·After replacing the steering lock actuator ASSY (Steering lock ECM), before starting the engine be sure to turn the steering mechanism to the left and right to confirm that the steering is not locked. If the steering is locked, perform the steering lock procedure (open and close any door when the vehicle is in the IG OFF state) and then unlock the steering (press the push button start switch). With the steering being locked, the engine cannot be started.

1. Operation check (IG ON)

(1) Operate the push button start switch to check whether it can be placed in the IG ON state.

Criteria : The ignition can be turned to IG ON.

>Progress to “Smart entry & start system (smart entry function)” (Symptom table) (Refer to

)

OK▼

2. Reading the SSM3 data (unlock request reception state)

(1) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[Steering lock unlock request reception status]	Indicates steering lock unlock request signal reception state. Display range: NG(Past)/OK	NG(Past): IG ON, ACC ON or engine start operation not performed OK: Within 10 seconds after IG ON, ACC ON or engine start operation	·The engine cannot be started when the unlock request signal cannot be received. ·If “OK” is not displayed even if the steering unlock conditions are satisfied, there may be a smart key computer ASSY (Collation ECM) malfunction.

Criteria : An unlock request signal is received within 10 seconds after the engine is started.

> Go to Step 7.

3. Inspection of the steering lock actuator ASSY (Steering lock ECM)

Inspection terminals	Inspection conditions	Standard value
D59-1 (GND) - Chassis ground	Always	Less than 1 Ω

Inspection terminals	Inspection conditions	Standard value
D59-7 (B) - Chassis ground	Always	11 to 14 V

>Repair or replacement of wiring harness or connector

*a	Connector connected (Steering lock actuator ASSY (Steering lock ECM))

4. Inspection of the steering lock actuator ASSY (Steering lock ECM)

(1) Use an oscilloscope to check the waveform between the terminals.

Item	Contents
Inspection terminals	D59-3 (SLR+) - D59-1 (GND)
Equipment setting	2 V/DIV, 200 ms/DIV
Inspection conditions	Steering lock actuator motor stopped → Steering lock actuator motor running → Steering lock actuator motor stopped

*a	Connector connected (Steering lock actuator ASSY (Steering lock ECM))
*b	Steering lock actuator motor stopped
*c	Steering lock actuator motor running

·Lock motor stopped: No operation
·Lock motor running:

·Steering unlock:
The electrical key transmitter SUB-ASSY (Electronic key) is being carried and the vehicle is set to ACC ON or IG ON.
·Steering lock:
The door is opened while the shifter is in the P position (Transmission A/T) and the vehicle is set to IG OFF and ACC OFF.

> Go to Step 9.

(1) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

5. Reading the SSM3 data (L code check)

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[L Code Check]	Indicates the collation results between the smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM). Display range: NG/OK	NG: Collation results abnormal OK: Collation results normal	·The smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM) are unable to perform L code registration. ·Steering lock cannot be performed. ·Steering unlock cannot be performed. (The engine cannot be started.)

·Steering lock actuator ASSY (Steering lock ECM) or smart key computer ASSY (Collation ECM) fault.
·Communication malfunction between both ECMs.
·One of the ECMs was replaced and is not yet registered.
·When replaced with an ECM with a code that has already been written.

>Replacement of the steering lock actuator ASSY (Steering lock ECM) (Refer to

)

OK▼

6. Replacement of the steering lock actuator ASSY (Steering lock ECM)

(1) Replace the steering lock actuator (Steering lock ECM) with a new part. (Refer to

)

(2) Perform registration. (Registration manual for immobilizer)

(3) Turn the ignition switch to ON.

(4) Operate the steering wheel to check the steering lock state.

Criteria : The steering lock is released.

>Replacement of the smart key computer ASSY (Collation ECM)

OK▼

Complete (Failure of the steering lock actuator ASSY)

7. Inspection of the smart key computer ASSY (Collation ECM)

(1) Disconnect the smart key computer ASSY (Collation ECM) connector D41.

(2) Disconnect the brake actuator ASSY (skid control computer) connector A5.

(3) Measure the resistance between the terminals.

Resistance

Inspection terminals	Inspection conditions	Standard value
D41-27 (SPD) - A5-2 (SPD)	Always	Less than 1 Ω
D41-27 (SPD) - A5-2 (SPD) - Chassis ground	Always	10 k Ω or more

>Repair or replacement of wiring harness or connector

(1) Replace the smart key computer ASSY (Collation ECM) with a new part.

8. Smart key computer ASSY (Collation ECM)

(2) Perform registration. (Refer to the “Registration manual for immobilizer”)

(4) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[Steering lock lock request reception status]	Indicates steering lock unlock request signal reception state. Display range: NG(Past)/OK	NG(Past): IG ON, ACC ON or engine start operation not performed OK: Within 10 seconds after IG ON, ACC ON or engine start operation	·The engine cannot be started when the unlock request signal cannot be received. ·If “OK“ is not displayed even if the steering unlock conditions are satisfied, there may be a smart key computer ASSY (Collation ECM) malfunction.

Criteria : An unlock request signal is received within 10 seconds after the engine is started.

>Replacement of the steering lock actuator ASSY (Steering lock ECM) (Refer to

)

OK▼

Complete (Smart key computer ASSY (Collation ECM) fault)

9. Inspect the wiring harness and connector (Smart key computer ASSY (Collation ECM) - Steering lock actuator ASSY (Steering lock ECM)).

(1) Disconnect the steering lock actuator (Steering lock ECM) connector D59.

(2) Disconnect the smart key computer ASSY (Collation ECM) connector D41.

(3) Confirm that there is no deformation or corrosion on the connector case and terminal.

Criteria : There is no deformation or corrosion on the connector case and terminal.

(4) Measure the resistance between the terminals.

Resistance

Inspection terminals	Inspection conditions	Standard value
D41-29 (SLR+) - D59-3 (SLR+)	Always	Less than 1 Ω
D59-3 (SLR+) - Chassis ground	Always	10 k Ω or more

>Repair or replacement of wiring harness or connector

10. Replacement of the steering lock actuator ASSY (Steering lock ECM)

(1) Replace the steering lock actuator (Steering lock ECM) with a new part. (Refer to

)

(2) Perform registration. (Refer to the “Registration manual for immobilizer”)

(3) Turn the ignition switch to ON.

(4) Operate the steering wheel to check the steering lock state.

Criteria : The steering lock is released.

>Replacement of the smart key computer ASSY (Collation ECM)

OK▼

Complete (Failure of the steering lock actuator ASSY)

The steering lock does not operate (without ID code box).

Circuit description

The steering lock actuator ASSY (Steering lock ECM) drives the lock motor that inserts the lock bar into the steering column to lock the steering wheel.

During steering lock operation, there may be cases where the lock bar does not fit into the steering column lock hole, causing the steering to become unable to be locked. In this case, in the same manner as for conventional plate key vehicles, the steering can be locked after slightly turning the steering wheel and changing the steering column lock hole position.

Trouble phenomenon	Data monitor	Work support
The steering lock does not operate.	Check ·Lock request reception state ·L code check Main body ·The driver's door courtesy switch	Not applicable

·The steering lock system is equipped with functions that use multiplex communication. Firstly, please follow the directions in “How to troubleshoot” and then perform troubleshooting after confirming that there is no malfunction in the communication system.
·After repair is completed, confirm that trouble symptoms do not reoccur.
·Confirm that no diagnostic codes are output. (If diagnostic codes are output, firstly perform a diagnostic code flow chart check.)
·When replacing the smart key computer ASSY (Collation ECM) or the steering lock actuator ASSY (Steering lock ECM), please check the applicable precautions (Refer to

1. Reading the SSM3 data (unlock request reception state)

(1) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[Steering lock lock request reception status]	Indicates the lock request signal reception state. Display range: OK/NG(Past)	OK: When a lock request is received within 10 seconds after any one of the doors is opened while the shifter is in the P position (Transmission A/T) and the vehicle ignition is turned to IG OFF. NG(Past): Other than the above	If “OK” is not displayed even if the steering lock conditions are satisfied, there may be a smart key computer ASSY (Collation ECM) malfunction.

Criteria : After changing from IG ON to IG OFF, a lock request signal is received within 10 seconds after any of the doors are opened.

> Go to Step 6.

2. Inspection of the steering lock actuator ASSY (Steering lock ECM)

Inspection terminals	Inspection conditions	Standard value
D59-1 (GND) - Chassis ground	Always	Less than 1 Ω

Inspection terminals	Inspection conditions	Standard value
D59-7 (B) - Chassis ground	Always	11 to 14 V

>Repair or replacement of wiring harness or connector

*a	Connector connected (Steering lock actuator ASSY (Steering lock ECM))

3. Inspection of the steering lock actuator ASSY (Steering lock ECM)

(1) Use an oscilloscope to measure the waveform between the terminals.

Item	Contents
Inspection terminals	D59-3 (SLR+) - D59-1 (GND)
Equipment setting	2 V/DIV, 200 ms/DIV
Inspection conditions	Steering lock actuator motor stopped → Steering lock actuator motor running → Steering lock actuator motor stopped

*a	Connector connected (Steering lock actuator ASSY (Steering lock ECM))
*b	Steering lock actuator motor stopped
*c	Steering lock actuator motor running

·Lock motor stopped: No operation
·Lock motor running:

·Steering unlock:
The electrical key transmitter SUB-ASSY (Electronic key) is being carried and the vehicle is set to ACC ON or IG ON.
·Steering lock:
Any door is opened while the shifter is in the P position (Transmission A/T) and the vehicle is set to IG OFF and ACC OFF.

> Go to Step 9.

(1) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

4. Reading the SSM3 data (L code check)

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[L Code Check]	Indicates the collation results between the smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM). Display range: NG/OK	NG: Collation results abnormal OK: Collation results normal	·The smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM) are unable to perform L code registration. ·Steering lock cannot be performed. ·Steering unlock cannot be performed. (The engine cannot be started.)

>Replacement of the steering lock actuator ASSY (Steering lock ECM) (Refer to

)

OK▼

5. Replacement of the steering lock actuator ASSY (Steering lock ECM)

(1) Replace the steering lock actuator (Steering lock ECM) with a new part. (Refer to

)

(2) Perform registration. (Refer to the “Registration manual for immobilizer”)

(3) Turn the ignition switch to ON.

(4) Operate the steering wheel to check the steering lock state.

Criteria : The steering lock is released.

>Replacement of the smart key computer ASSY (Collation ECM)

OK▼

Complete (Failure of the steering lock actuator ASSY)

6. Reading the SSM3 data (driver's door courtesy switch)

(1) Use the SSM3 to perform main body ECM (network gateway computer) data monitoring.

SSM3 screen: [Each System Check] → [Integ. unit mode] → [Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
The driver's door courtesy switch	State of the driver's door courtesy light switch. Display range: Closed/Open	Closed: Driver's door closed. Open: Driver's door open.	-

Criteria : The data monitoring trend changes as the driver's door is opened and closed.

>Carrying out main body ECM fault diagnosis (Refer to

)

OK▼

7. Inspection of the smart key computer ASSY (Collation ECM)

(1) Disconnect the smart key computer ASSY (Collation ECM) connector D41.

(2) Disconnect the brake actuator ASSY (skid control computer) connector A5.

(3) Measure the resistance between the terminals.

Resistance

Inspection terminals	Inspection conditions	Standard value
D41-27 (SPD) - A5-2 (SPD)	Always	Less than 1 Ω
D41-27 (SPD) - A5-2 (SPD) - Chassis ground	Always	10 k Ω or more

>Repair or replacement of wiring harness or connector

(1) Replace the smart key computer ASSY (Collation ECM) with a new part.

8. Smart key computer ASSY (Collation ECM)

(2) Perform registration. (Refer to the “Registration manual for immobilizer”)

(4) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[Steering lock lock request reception status]	Indicates the lock request signal reception state. Display range: NG(Past)/OK	OK: When a lock request is received within 10 seconds after any one of the doors is opened while the shifter is in the P position (Transmission A/T) and the vehicle ignition is turned to IG OFF. NG(Past): Other than the above	If “OK“ is not displayed even if the steering lock conditions are satisfied, there may be a smart key computer ASSY (Collation ECM) malfunction.

Criteria : After changing from IG ON to IG OFF, a lock request signal is received within 10 seconds after any of the doors are opened.

>Replacement of the steering lock actuator ASSY (Steering lock ECM) (Refer to

)

OK▼

Complete (Smart key computer ASSY (Collation ECM) fault)

9. Inspect the wiring harness and connector (Smart key computer ASSY (Collation ECM) - Steering lock actuator ASSY (Steering lock ECM)).

(1) Disconnect the steering lock actuator (Steering lock ECM) connector D59.

(2) Disconnect the smart key computer ASSY (Collation ECM) connector D41.

(3) Confirm that there is no deformation or corrosion on the connector case and terminal.

Criteria : There is no deformation or corrosion on the connector case and terminal.

(4) Measure the resistance between the terminals.

Resistance

Inspection terminals	Inspection conditions	Standard value
D41-29 (SLR+) - D59-3 (SLR+)	Always	Less than 1 Ω
D59-3 (SLR+) - Chassis ground	Always	10 k Ω or more

>Repair or replacement of wiring harness or connector

10. Replacement of the steering lock actuator ASSY (Steering lock ECM)

(1) Replace the steering lock actuator ASSY (Steering lock ECM) with a new part. (Refer to

)

(2) Perform registration. (Refer to the “Registration manual for immobilizer”)

(3) Turn the ignition switch to ON.

(4) Operate the steering wheel to check the steering lock state.

Criteria : The steering lock is released.

>Replacement of the smart key computer ASSY (Collation ECM)

OK▼

Complete (Failure of the steering lock actuator ASSY)

The steering lock cannot be released (cannot start the engine) (with ID code box)

Circuit description

The steering lock actuator ASSY (Steering lock ECM) drives the motor that inserts the lock bar into the steering column to lock the steering wheel.

Trouble phenomenon	Data monitor	Work support
The steering lock cannot be released (cannot start the engine)	Check ·Steering lock unlock request reception state ·L code check	Not applicable

·Before performing troubleshooting, check the fuse for this circuit.
·The steering lock system is equipped with functions that use multiplex communication. Firstly, please follow the directions in “How to troubleshoot” and then perform troubleshooting after confirming that there is no malfunction in the communication system.
·After repair is completed, confirm that trouble symptoms do not reoccur.
·Confirm that no diagnostic codes are output. (If diagnostic codes are output, firstly perform a diagnostic code flow chart check.)
·When replacing the smart key computer ASSY (Collation ECM), the steering lock actuator ASSY (Steering lock ECM) or the ID code box (with ID code box), please check the applicable precautions (Refer to

1. Operation check (IG ON)

(1) Operate the push button start switch to check whether it can be placed in the IG ON state.

Criteria : The ignition can be turned to IG ON.

>Progress to “Smart entry & start system (smart entry function)” (Symptom table) (Refer to

)

OK▼

2. Reading the SSM3 data (unlock request reception state)

(1) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[Steering lock unlock request reception status]	Indicates steering lock unlock request signal reception state. Display range: NG(Past)/OK	NG(Past): IG ON, ACC ON or engine start operation not performed OK: Within 10 seconds after IG ON, ACC ON or engine start operation	·The engine cannot be started when the unlock request signal cannot be received. ·If “OK” is not displayed even if the steering unlock conditions are satisfied, there may be a smart key computer ASSY (Collation ECM) malfunction.

Criteria : An unlock request signal is received within 10 seconds after the engine is started.

> Go to Step 8.

3. Inspection of the steering lock actuator ASSY (Steering lock ECM)

Inspection terminals	Inspection conditions	Standard value
D59-1 (GND) - Chassis ground	Always	Less than 1 Ω

Inspection terminals	Inspection conditions	Standard value
D59-7 (B) - Chassis ground	Always	11 to 14 V

>Repair or replacement of wiring harness or connector

*a	Connector connected (Steering lock actuator ASSY (Steering lock ECM))

4. Inspection of the steering lock actuator ASSY (Steering lock ECM)

(1) Use an oscilloscope to check the waveform between the terminals.

Item	Contents
Inspection terminals	D59-3 (SLR+) - D59-1 (GND)
Equipment setting	2 V/DIV, 200 ms/DIV
Inspection conditions	Steering lock actuator motor stopped → Steering lock actuator motor running → Steering lock actuator motor stopped

*a	Connector connected (Steering lock actuator ASSY (Steering lock ECM))
*b	Steering lock actuator motor stopped
*c	Steering lock actuator motor running

·Lock motor stopped: No operation
·Lock motor running:

> Go to Step 10.

(1) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

5. Reading the SSM3 data (S code check)

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[S Code Check]	Verification results between the collation ECM (smart key ECM ASSY) and the ID code box (immobilizer code ECM)/OK or NG.	OK: Confirmation results normal NG: Confirmation results abnormal	If abnormal: ·The ID code box (immobilizer code ECM) or the collation ECM (smart key ECM ASSY) ID codes are not registered, or they are malfunctioning. ·The steering is not locked. ·The steering is not unlocked. (The engine cannot be started.)

> Go to Step 12.

(1) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

6. Reading the SSM3 data (L code check)

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[L Code Check]	Indicates the collation results between the smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM). Display range: NG/OK	NG: Collation results abnormal OK: Collation results normal	·The smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM) are unable to perform L code registration. ·Steering lock cannot be performed. ·Steering unlock cannot be performed. (The engine cannot be started.)

> Go to Step 13.

7. Replacement of the steering lock actuator ASSY (Steering lock ECM)

(1) Replace the steering lock actuator (Steering lock ECM) with a new part. (Refer to

)

(2) Perform registration. (Refer to the “Registration manual for immobilizer”)

(3) Turn the ignition switch to ON.

(4) Operate the steering wheel to check the steering lock state.

Criteria : The steering lock is released.

> Go to Step 14.

OK▼

Complete (Failure of the steering lock actuator ASSY)

8. Inspection of the smart key computer ASSY (Collation ECM)

(1) Disconnect the smart key computer ASSY (Collation ECM) connector D41.

(2) Disconnect the brake actuator ASSY (skid control computer) connector A5.

(3) Measure the resistance between the terminals.

Resistance

Inspection terminals	Inspection conditions	Standard value
D41-27 (SPD) - A5-2 (SPD)	Always	Less than 1 Ω
D41-27 (SPD) - A5-2 (SPD) - Chassis ground	Always	10 k Ω or more

>Repair or replacement of wiring harness or connector

(1) Replace the smart key computer ASSY (Collation ECM) with a new part.

9. Smart key computer ASSY (Collation ECM)

(2) Perform registration. (Refer to the “Registration manual for immobilizer”)

(4) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[Steering lock unlock request reception status]	Indicates steering lock unlock request signal reception state. Display range: NG(Past)/OK	NG(Past): IG ON, ACC ON or engine start operation not performed OK: Within 10 seconds after IG ON, ACC ON or engine start operation	·The engine cannot be started when the unlock request signal cannot be received. ·If “OK“ is not displayed even if the steering unlock conditions are satisfied, there may be a smart key computer ASSY (Collation ECM) malfunction.

Criteria : An unlock request signal is received within 10 seconds after the engine is started.

>Replacement of the ID code box (immobilizer ECM)

Complete (Smart key computer ASSY (Collation ECM) fault)

10. Inspect the wiring harness and connector (Smart key computer ASSY (Collation ECM) - Steering lock actuator ASSY (Steering lock ECM)).

(1) Disconnect the steering lock actuator (Steering lock ECM) connector D59.

(2) Disconnect the smart key computer ASSY (Collation ECM) connector D41.

(3) Confirm that there is no deformation or corrosion on the connector case and terminal.

Criteria : There is no deformation or corrosion on the connector case and terminal.

(4) Measure the resistance between the terminals.

>Repair or replacement of wiring harness or connector

Inspection terminals	Inspection conditions	Standard value
D41-29 (SLR+) - D59-3 (SLR+)	Always	Less than 1 Ω
D59-3 (SLR+) - Chassis ground	Always	10 k Ω or more

11. Replacement of the steering lock actuator ASSY (Steering lock ECM)

(1) Replace the steering lock actuator (Steering lock ECM) with a new part. (Refer to

)

(2) Perform registration. (Refer to the “Registration manual for immobilizer”)

(3) Turn the ignition switch to ON.

(4) Operate the steering wheel to check the steering lock state.

Criteria : The steering lock is released.

>Replacement of the smart key computer ASSY (Collation ECM)

OK▼

Complete (Failure of the steering lock actuator ASSY)

12. Replacement of the ID code box (immobilizer code ECM)

(1) Replace the ID code box (immobilizer code ECM) with a new part.

(2) Perform registration. (Refer to the “Registration manual for immobilizer”)

(3) Turn the ignition switch to ON.

(4) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[S Code Check]	Verification results between the collation ECM (smart key ECM ASSY) and the ID code box (immobilizer code ECM)/OK or NG.	OK: Confirmation results normal NG: Confirmation results abnormal	If abnormal: ·The ID code box (immobilizer code ECM) or the collation ECM (smart key ECM ASSY) ID codes are not registered, or they are malfunctioning. ·The steering is not locked. ·The steering is not unlocked. (The engine cannot be started.)

>Replacement of the smart key computer ASSY (Collation ECM)

Complete (ID code box (immobilizer code ECM) fault)

13. Replacement of the ID code box (immobilizer code ECM)

(1) Replace the ID code box (immobilizer code ECM) with a new part.

(2) Perform registration. (Refer to the “Registration manual for immobilizer”)

(4) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[L Code Check]	Indicates the collation results between the smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM). Display range: NG/OK	NG: Collation results abnormal OK: Collation results normal	·The smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM) are unable to perform L code registration. ·Steering lock cannot be performed. ·Steering unlock cannot be performed. (The engine cannot be started.)

>Replacement of the steering lock actuator ASSY (Steering lock ECM) (Refer to

)

OK▼

Complete (ID code box (immobilizer code ECM) fault)

14. Replacement of the smart key computer ASSY (Collation ECM)

(1) Replace the smart key computer ASSY (Collation ECM) with a new part.

(2) Perform registration. (Refer to the “Registration manual for immobilizer”)

(3) Turn the ignition switch to ON.

(4) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[L Code Check]	Indicates the collation results between the smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM). Display range: NG/OK	NG: Collation results abnormal OK: Collation results normal	·The smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM) are unable to perform L code registration. ·Steering lock cannot be performed. ·Steering unlock cannot be performed. (The engine cannot be started.)

>Replacement of the ID code box (immobilizer ECM)

Complete (Smart key computer ASSY (Collation ECM) fault)

The steering lock does not operate (with ID code box).

Circuit description

The steering lock actuator ASSY (Steering lock ECM) drives the lock motor that inserts the lock bar into the steering column to lock the steering wheel.

Trouble phenomenon	Data monitor	Work support
The steering lock does not operate.	Check ·Lock request reception state ·L code check Main body ·The driver's door courtesy switch	Not applicable

·The steering lock system is equipped with functions that use multiplex communication. Firstly, please follow the directions in “How to troubleshoot” and then perform troubleshooting after confirming that there is no malfunction in the communication system.
·After repair is completed, confirm that trouble symptoms do not reoccur.
·Confirm that no diagnostic codes are output. (If diagnostic codes are output, firstly perform a diagnostic code flow chart check.)
·When replacing the smart key computer ASSY (Collation ECM) or the steering lock actuator ASSY (Steering lock ECM), please check the applicable precautions (Refer to

1. Reading the SSM3 data (unlock request reception state)

(1) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[Steering lock lock request reception status]	Indicates the lock request signal reception state. Display range: OK/NG(Past)	OK: When a lock request is received within 10 seconds after any one of the doors is opened while the shifter is in the P position (Transmission A/T) and the vehicle ignition is turned to IG OFF. NG(Past): Other than the above	If “OK” is not displayed even if the steering lock conditions are satisfied, there may be a smart key computer ASSY (Collation ECM) malfunction.

Criteria : After changing from IG ON to IG OFF, a lock request signal is received within 10 seconds after any of the doors are opened.

> Go to Step 7.

2. Inspection of the steering lock actuator ASSY (Steering lock ECM)

Inspection terminals	Inspection conditions	Standard value
D59-1 (GND) - Chassis ground	Always	Less than 1 Ω

Inspection terminals	Inspection conditions	Standard value
D59-7 (B) - Chassis ground	Always	11 to 14 V

>Repair or replacement of wiring harness or connector

*a	Connector connected (Steering lock actuator ASSY (Steering lock ECM))

3. Inspection of the steering lock actuator ASSY (Steering lock ECM)

(1) Use an oscilloscope to measure the waveform between the terminals.

Item	Contents
Inspection terminals	D59-3 (SLR+) - D59-1 (GND)
Equipment setting	2 V/DIV, 200 ms/DIV
Inspection conditions	Steering lock actuator motor stopped → Steering lock actuator motor running → Steering lock actuator motor stopped

*a	Connector connected (Steering lock actuator ASSY (Steering lock ECM))
*b	Steering lock actuator motor stopped
*c	Steering lock actuator motor running

·Lock motor stopped: No operation
·Lock motor running:

> Go to Step 10.

(1) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

4. Reading the SSM3 data (S code check)

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[S Code Check]	Verification results between the collation ECM (smart key ECM ASSY) and the ID code box (immobilizer code ECM)/OK or NG.	OK: Confirmation results normal NG: Confirmation results abnormal	If abnormal: ·The ID code box (immobilizer code ECM) or the collation ECM (smart key ECM ASSY) ID codes are not registered, or they are malfunctioning. ·The steering is not locked. ·Steering unlock cannot be performed. (The engine cannot be started.)

> Go to Step 12.

(1) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

5. Reading the SSM3 data (L code check)

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[L Code Check]	Indicates the collation results between the smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM). Display range: NG/OK	NG: Collation results abnormal OK: Collation results normal	·The smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM) are unable to perform L code registration. ·Steering lock cannot be performed. ·Steering unlock cannot be performed. (The engine cannot be started.)

> Go to Step 13.

6. Replacement of the steering lock actuator ASSY (Steering lock ECM)

(1) Replace the steering lock actuator (Steering lock ECM) with a new part. (Refer to

)

(2) Perform registration. (Refer to the “Registration manual for immobilizer”)

(3) Turn the ignition switch to ON.

(4) Operate the steering wheel to check the steering lock state.

Criteria : The steering lock is released.

> Go to Step 14.

OK▼

Complete (Failure of the steering lock actuator ASSY)

7. Reading the SSM3 data (driver's door courtesy switch)

(1) Use the SSM3 to perform main body ECM (network gateway computer) data monitoring.

SSM3 screen: [Each System Check] → [Integ. unit mode] → [Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
The driver's door courtesy switch	State of the driver's door courtesy light switch. Display range: Closed/Open	Closed: Driver's door closed. Open: Driver's door open.	-

Criteria : The data monitoring trend changes as the driver's door is opened and closed.

>Carrying out main body ECM fault diagnosis (Refer to

)

OK▼

8. Inspection of the smart key computer ASSY (Collation ECM)

(1) Disconnect the smart key computer ASSY (Collation ECM) connector D41.

(2) Disconnect the brake actuator ASSY (skid control computer) connector A5.

(3) Measure the resistance between the terminals.

Resistance

Inspection terminals	Inspection conditions	Standard value
D41-27 (SPD) - A5-2 (SPD)	Always	Less than 1 Ω
D41-27 (SPD) - A5-2 (SPD) - Chassis ground	Always	10 k Ω or more

>Repair or replacement of wiring harness or connector

(1) Replace the smart key computer ASSY (Collation ECM) with a new part.

9. Smart key computer ASSY (Collation ECM)

(2) Perform registration. (Refer to the “Registration manual for immobilizer”)

(4) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[Steering lock lock request reception status]	Indicates the lock request signal reception state. Display range: OK/NG(Past)	OK: When a lock request is received within 10 seconds after any one of the doors is opened while the shifter is in the P position (Transmission A/T) and the vehicle ignition is turned to IG OFF. NG(Past): Other than the above	If “OK“ is not displayed even if the steering lock conditions are satisfied, there may be a smart key computer ASSY (Collation ECM) malfunction.

Criteria : After changing from IG ON to IG OFF, a lock request signal is received within 10 seconds after any of the doors are opened.

>Replacement of the ID code box (immobilizer code ECM)

Complete (Smart key computer ASSY (Collation ECM) fault)

10. Inspect the wiring harness and connector (Smart key computer ASSY (Collation ECM) - Steering lock actuator ASSY (Steering lock ECM)).

(1) Disconnect the steering lock actuator (Steering lock ECM) connector D59.

(2) Disconnect the smart key computer ASSY (Collation ECM) connector D41.

(3) Confirm that there is no deformation or corrosion on the connector case and terminal.

Criteria : There is no deformation or corrosion on the connector case and terminal.

(4) Measure the resistance between the terminals.

>Repair or replacement of wiring harness or connector

Inspection terminals	Inspection conditions	Standard value
D41-29 (SLR+) - D59-3 (SLR+)	Always	Less than 1 Ω
D59-3 (SLR+) - Chassis ground	Always	10 k Ω or more

11. Replacement of the steering lock actuator ASSY (Steering lock ECM)

(1) Replace the steering lock actuator ASSY (Steering lock ECM) with a new part. (Refer to

)

(2) Perform registration. (Refer to the “Registration manual for immobilizer”)

(3) Turn the ignition switch to ON.

(4) Operate the steering wheel to check the steering lock state.

Criteria : The steering lock is released.

>Replacement of the smart key computer ASSY (Collation ECM)

OK▼

Complete (Failure of the steering lock actuator ASSY)

12. Replacement of the ID code box (immobilizer code ECM)

(1) Replace the ID code box (immobilizer code ECM) with a new part.

(2) Perform registration. (Refer to the “Registration manual for immobilizer”)

(3) Turn the ignition switch to ON.

(4) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[S Code Check]	Verification results between the collation ECM (smart key ECM ASSY) and the ID code box (immobilizer code ECM)/OK or NG.	OK: Confirmation results normal NG: Confirmation results abnormal	If abnormal: ·The ID code box (immobilizer code ECM) or the collation ECM (smart key ECM ASSY) ID codes are not registered, or they are malfunctioning. ·The steering is not locked. ·The steering is not unlocked. (The engine cannot be started.)

>Replacement of the smart key computer ASSY (Collation ECM)

Complete (ID code box (immobilizer code ECM) fault)

13. Replacement of the ID code box (immobilizer code ECM)

(1) Replace the ID code box (immobilizer code ECM) with a new part.

(2) Perform registration. (Refer to the “Registration manual for immobilizer”)

(4) Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.

SSM3 screen: [Each System Check] → [Keyless Access System] → [Collation ECM]→[Current Data Display & Save]

Item name	Description/display range	Normal value	Remarks
[L Code Check]	Indicates the collation results between the smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM). Display range: NG/OK	NG: Collation results abnormal OK: Collation results normal	·The smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM) are unable to perform L code registration. ·Steering lock cannot be performed. ·Steering unlock cannot be performed. (The engine cannot be started.)