B2285

2GR-FE STARTING: SMART ACCESS SYSTEM WITH PUSH-BUTTON START: B2285: Steering Lock Position Signal Circuit Malfunction
B2285 - Steering Lock Position Signal Circuit Malfunction

DESCRIPTION

This DTC is output when serial communication signals and LIN communication signals in the circuit between the main body ECU and steering lock actuator (steering lock ECU) are inconsistent.

HINT
When the main body 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.

After the main body ECU or steering lock ECU is replaced, perform the registration procedures for the engine immobilizer system Registration.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM

(a) Connect Techstream to the DLC3.

(b) Check the DATA LIST for proper functioning of the steering lock function.

HINT
When using Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the tester and vehicle starts.

Main Body:





OK:

ON (steering is unlocked) and OFF (steering is locked) appear on the screen.

NG -- CHECK WIRE HARNESS (MAIN BODY ECU - STEERING LOCK ECU)
OK -- Continue to next step.

2. CHECK FOR DTCs

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

(b) Check for DTC B2285 (Steering lock position signal circuit malfunction) and DTC B2287 (LIN communication master malfunction) and DTC B2785 (Communication malfunction between ECUs connected by LIN).

Result:





HINT
* If DTC B2287 is output, B2287.
* If DTC B2285 is output, B2785.

C -- CHECK INTERMITTENT PROBLEMS

B -- GO TO DTC CHART

A -- REPLACE MAIN BODY ECU

3. CHECK WIRE HARNESS (MAIN BODY ECU - STEERING LOCK ECU)

(a) Disconnect the E61, DR and E78 ECU connectors.





(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 MAIN BODY ECU OPERATION

(a) After replacing the main body ECU with a normally functioning ECU, check that the engine starts. Make sure the brake pedal is depressed and the shift position is P at this time.

(b) Check that the engine switch mode can be changed by pushing the engine switch.

HINT
Without depressing the brake pedal, push the engine switch repeatedly. Engine switch mode should turn from off to on (ACC) to on (IG) and back to off. With the brake pedal depressed, push the engine switch repeatedly. Engine switch mode should turn to ENGINE START from any status.

OK:

Engine can start normally.

NG -- REPLACE STEERING LOCK ECU

OK -- END (MAIN BODY ECU DEFECTIVE)