B2288

DESCRIPTION

This DTC is output when the power source control ECU cannot detect the unlock condition of the steering lock within a specified time.

HINT:

When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

DTC No.	DTC Detection Condition	Trouble Area
B2288	After turning engine switch from off to on (IG), the steering wheel does not unlock for a certain period of time (ECU unlocks steering wheel only when it receives an unlock signal from LIN communication and cable)	Power source control ECU Steering lock ECU Wire harness or connector

WIRING DIAGRAM

INSPECTION PROCEDURE

1. CHECK FOR DTCS

1. Delete the DTC (Click here).

2. Check for DTCs again.

   OK:

   DTC B2785, DTC B2287 and DTC B2781 are not output.
   

   HINT:

   1. If DTC B2785 is output (Click here).
      
   2. If DTC B2287 is output (Click here).
      
   3. If DTC B2278 is output (Click here).
      

NG	GO TO DTC CHART

OK

2. CHECK CONNECTORS

1. Check that the connectors are securely connected and the terminals are not deformed or loose.

   OK:

   The connectors are securely connected and the terminals are not deformed or loose.
   

NG	REPAIR OR REPLACE CONNECTORS

OK

3. CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - BODY GROUND)

1. Disconnect the J55 ECU connector.

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

   Standard resistance:

   Tester Connection (Symbols)	Condition	Specified Condition
   J55-6 (GND2) - Body ground	Always	Below 1 Ω

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4. CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - STEERING LOCK ECU)

1. Disconnect the J29 ECU connector.

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   J55-26 (SLP) - J29-4 (SLP1)	Always	Below 1 Ω
   J55-32 (SLR+) - J29-3 (IGE)	Always	Below 1 Ω
   J55-30 (LIN1) - J29-5 (LIN)	Always	Below 1 Ω
   J29-2 (SGND) - Body ground	Always	Below 1 Ω
   J29-1 (GND) - Body ground	Always	Below 1 Ω
   J55-26 (SLP) or J29-4 (SLP1) - Body ground	Always	10 kΩ or higher
   J55-32 (SLR+) or J29-3 (IGE) - Body ground	Always	10 kΩ or higher
   J55-30 (LIN1) or J29-5 (LIN) - Body ground	Always	10 kΩ or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5. INSPECT POWER SOURCE CONTROL ECU

1. Reconnect the J55 ECU connector.

2. Connect the oscilloscope to the power source control ECU terminals specified in the table below and check the waveform.

   Item	Contents
   Terminal (Symbols)	J55-26 (SLP) - Body ground
   Equipment Setting	2 V/DIV, 100 ms/DIV
   Condition	Engine switch on (IG)

   OK:

   The waveform appears as shown in the illustration.
   

   HINT:

   The waveform varies depending on the contents of communication.

NG	REPLACE POWER SOURCE CONTROL ECU

OK

6. INSPECT STEERING LOCK ECU

1. Reconnect the J29 ECU connector.

2. Connect the oscilloscope to the power source control ECU terminals specified in the table below and check the waveform.

   Item	Contents
   Terminal (Symbols)	J55-26 (SLP) - Body ground
   Equipment Setting	2 V/DIV, 100 ms/DIV
   Condition	Steering is LOCK / UNLOCK

   OK:

   The waveform appears as shown in the illustration.
   

   HINT:

   The waveform varies depending on the contents of communication.

NG	REPLACE STEERING LOCK ECU

OK

7. RECHECK FOR DTC

1. Delete the DTCs (Click here).

2. Check for DTCs again.

   OK:

   DTC B2288 is not output.
   

NG	REPLACE POWER SOURCE CONTROL ECU

OK
REPLACE STEERING LOCK ECU