B2288

4GR-FSE STARTING: SMART ACCESS SYSTEM WITH PUSH-BUTTON START: B2288: Steering Lock Signal Circuit Malfunction
B2288 - Steering Lock Signal Circuit Malfunction

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.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTCS

(a) Delete the DTC Reading and Clearing Diagnostic Trouble Codes.

(b) Check for DTCs again.

OK:

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

HINT
* If DTC B2785 is output B2785.
* If DTC B2287 is output B2287.
* If DTC B2278 is output B2278.

NG -- GO TO DTC CHART
OK -- Continue to next step.

2. CHECK CONNECTORS

(a) 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 -- Continue to next step.

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

(a) Disconnect the J55 ECU connector.





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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

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

(a) Disconnect the J29 ECU connector.





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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. INSPECT POWER SOURCE CONTROL ECU

(a) Reconnect the J55 ECU connector.





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









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 -- Continue to next step.

6. INSPECT STEERING LOCK ECU

(a) Reconnect the J29 ECU connector.





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









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 -- Continue to next step.

7. RECHECK FOR DTC

(a) Delete the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Check for DTCs again.

OK:

DTC B2288 is not output.

NG -- REPLACE POWER SOURCE CONTROL ECU

OK -- REPLACE STEERING LOCK ECU