PUSH-BUTTON START SYSTEM > Power Source Mode does not Change to ON (READY)

for Preparation Click here


DESCRIPTION

When the electronic key is in the cabin and the power switch is pressed, the power management control ECU receives a signal and changes the power source mode. In addition, when the power switch is pressed with park (P) selected and the brake pedal depressed, the hybrid control system turns on (READY).

HINT:
  1. When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) auxiliary battery terminal, the power source mode changes to on (IG).
  2. When the auxiliary battery cable is disconnected and reconnected, the power source returns to the mode it was in before the auxiliary battery cable was disconnected.


WIRING DIAGRAM


B273648E01


B256307E03


INSPECTION PROCEDURE

NOTICE:
  1. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  2. When using the intelligent tester with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the intelligent tester and vehicle begins, or 2) connect the intelligent tester to the vehicle, select the vehicle type under manual mode, and then enter the following menus:
    for Power Source Control: Body / Power Source Control / DTC.
    for Entry&Start: Body / Entry&Start / DTC.
  3. The push-button start system uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting (Click here).
  4. If the push-button start system is disabled through the customize function, enable the system before performing troubleshooting (Click here).
  5. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  6. When replacing the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU), registration must be performed refer to the Service Bulletin.
  7. After completing repairs, confirm that the problem does not occur.


HINT:

Related Data List and Active Test Items 
Problem Symptom
Data List Item
Active Test Item
Power Source Mode does not Change to ON (READY)
Power Source Control
  1. Stop Light Switch1
  2. Power Supply Condition
  3. IG1 Relay Monitor (Inside)
  4. IG2 Relay Monitor (Inside)
  5. IG1 Relay Monitor (Outside)
  6. IG2 Relay Monitor (Outside)
  7. Latch Circuit
  8. Starter Request Signal
Entry&Start
  1. S Code Check
  2. L Code Check
  3. Engine Start Request
  4. Immobiliser
-

1.CHECK HYBRID CONTROL SYSTEM READY ON

  1. Place the electrical key on the driver seat.

  1. Depress the brake pedal.

  1. Check that the power switch indicator light is green. Then press the power switch to check if the hybrid control system turns on (READY).

    OK:
    Power source mode becomes on (READY).



NG
Go to step 2
OK

END (HYBRID CONTROL SYSTEM PERMISSION CONDITIONS WERE NOT SATISFIED) 

2.CHECK FOR DTC

  1. Turn the power switch off.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Powertrain / Hybrid Control / DTC.

  1. Check for DTCs.

    OK:
    DTC is not output.



NG
GO TO HYBRID CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) (Click here)
OK


3.CHECK FOR DTC

  1. Enter the following menus: Body / Power Source Control / DTC.

  1. Check for DTCs.

    OK:
    DTC is not output.



NG
GO TO DIAGNOSTIC TROUBLE CODE CHART (Click here)
OK


4.CHECK POWER SOURCE CONDITION

  1. Check the power source mode change.

    1. When the key is inside the vehicle and the park (P) is selected, check that pressing the power switch causes the power source mode to change.

      Result:
      Result
      		Proceed to
      off → on (ACC) → on (IG) → off
      		A
      Power source mode does not change to on (IG and ACC)
      		B
      Power source mode does not change to on (IG)
      		C
      Power source mode does not change to on (ACC)
      		D



B
GO TO OTHER FLOW CHART (Power Source Mode does not Change to ON (IG and ACC)) (Click here)

C
GO TO OTHER FLOW CHART (Power Source Mode does not Change to ON (IG)) (Click here)

D
GO TO OTHER FLOW CHART (Power Source Mode does not Change to ON (ACC)) (Click here)
A


5.READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH ASSEMBLY)

  1. Read the Data List according to the display on the intelligent tester.

    Power Source Control 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Stop Light Switch1
    		Stop light switch 1/ON or OFF
    		ON: Brake pedal depressed
    OFF: Brake pedal released
    		-

    OK:
    ON (brake pedal is depressed) and OFF (brake pedal is released) appear on the screen.



NG
Go to step 11
OK


6.READ VALUE USING INTELLIGENT TESTER (L CODE)

  1. Enter the following menus: Body / Entry&Start / Data List.

  1. Read the Data List according to the display on the intelligent tester.

    Entry&Start 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    L Code Check
    		L code certification result/OK or NG
    		OK: L code certification result normal
    NG: L code certification result abnormal
    		-

    OK:
    OK appears on the screen.



NG
Go to step 13
OK


7.READ VALUE USING INTELLIGENT TESTER (ENGINE START REQUEST)

  1. Read the Data List according to the display on the intelligent tester.

    Entry&Start 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Engine Start Request
    		Start request signal response/OK or NG
    		OK: Start request condition signal received
    NG: Start request condition signal not received
    		-

    OK:
    OK appears on the screen.

    Result:
    Result
    		Proceed to
    OK
    		A
    NG
    		B



B
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
A


8.READ VALUE USING INTELLIGENT TESTER (S CODE)

  1. Read the Data List according to the display on the intelligent tester.

    Entry&Start 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    S Code Check
    		S code certification result/OK or NG
    		OK: S code certification result normal
    NG: S code certification result abnormal
    		-

    OK:
    OK appears on the screen.



NG
Go to step 15
OK


9.CHECK ID CODE BOX (IMMOBILISER CODE ECU)


    B231391E05

  1. Measure the voltage according to the value(s) in the table below.
    Text in Illustration 
    *a
    		Component with harness connected
    (Power Management Control ECU)



    1. Waveform 1


      B253467E01


      Text in Illustration 
      *a
      		Approximately 160 ms
      		*b
      		Approximately 510 ms
      Measurement Condition 
      Item
      		Content
      Tester Connection
      		H4-20 (IMO) - H3-6 (E1)
      Tool Setting
      		2 V/DIV., 200 ms/DIV.
      Condition
      		Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected



    2. Waveform 2


      B253466E01


      Text in Illustration 
      *a
      		Approximately 160 ms
      		*b
      		Approximately 510 ms
      Measurement Condition 
      Item
      		Content
      Tester Connection
      		H4-21 (IMI) - H3-6 (E1)
      Tool Setting
      		2 V/DIV., 200 ms/DIV.
      Condition
      		Power switch on (IG)

      OK:
      The waveform is displayed as shown in illustration.



NG
REPLACE ID CODE BOX (IMMOBILISER CODE ECU)
OK


10.READ VALUE USING INTELLIGENT TESTER

  1. Enter the following menus: Body / Power Source Control / Data List.

  1. Read the Data List according to the display on the intelligent tester.

    Power Source Control 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Starter Request Signal
    		Hybrid control system start request signal / ON or OFF
    		ON: STSW signal is on
    OFF: STSW signal is off
    		-

    OK:
    Data List display changes when the power switch is operated.



NG
REPLACE POWER MANAGEMENT CONTROL ECU (Click here)
OK

GO TO HYBRID CONTROL SYSTEM (Click here)  

11.INSPECT STOP LIGHT SWITCH ASSEMBLY


    C178168E24

  1. Remove the stop light switch assembly (Click here).

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 2
    		Pushed
    		10 kΩ or higher
    1 - 2
    		Not pushed
    		Below 1 Ω

    Text in Illustration 
    *a
    		Component without harness connected
    (Stop Light Switch Assembly)
    *b
    		Free
    *c
    		Pushed in



NG
REPLACE STOP LIGHT SWITCH ASSEMBLY (Click here)
OK


12.CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY)

  1. Disconnect the A20 connector from the power management control ECU.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A20-23 (STP) - A25-1
    		Always
    		Below 1 Ω
    A20-23 (STP) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE POWER MANAGEMENT CONTROL ECU (Click here)  

13.REPLACE TRANSMISSION CONTROL ECU ASSEMBLY

  1. Replace transmission control ECU assembly (Click here).


NEXT


14.CHECK HYBRID CONTROL SYSTEM READY ON

  1. Place the electrical key on the driver seat.

  1. Depress the brake pedal.

  1. Check that the power switch indicator light is green. Then press the power switch to check if the hybrid control system turns on (READY).

    OK:
    Power source mode becomes on (READY).



NG
REPLACE ID CODE BOX (IMMOBILISER CODE ECU)
OK

END (TRANSMISSION CONTROL ECU WAS DEFECTIVE) 

15.REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  1. Replace the certification ECU (smart key ECU assembly).


NEXT


16.CHECK HYBRID CONTROL SYSTEM READY ON

  1. Place the electrical key on the driver seat.

  1. Depress the brake pedal.

  1. Check that the power switch indicator light is green. Then press the power switch to check if the hybrid control system turns on (READY).

    OK:
    Power source mode becomes on (READY).



NG
REPLACE ID CODE BOX (IMMOBILISER CODE ECU)
OK

END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)