B2285

3MZ-FE STARTING: SMART KEY SYSTEM: B2285: Steering Lock Position Signal Circuit Malfunction

DTC 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 (instrument panel junction block) and steering lock actuator (steering lock ECU) are inconsistent.
HINT: When the main body ECU (instrument panel junction block) 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 (instrument panel junction block) or steering lock ECU is replaced, perform the registration procedures for the engine immobiliser system. Engine Immobiliser System





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 power 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 HARNESS AND CONNECTOR (MAIN BODY ECU - STEERING LOCK ECU)
OK -- Continue to next step.
2. CHECK FOR DTCS
(a) Delete the DTCs.
(b) Check for DTC B2285 (Steering lock position signal circuit malfunction), DTC B2287 (LIN communication master malfunction) and DTC B2785 (Communication malfunction between ECUs connected by LIN).
Result:





HINT: If DTC B2287 is output, perform troubleshooting for DTC B2287 first.

C -- USE SYMPTOM METHOD TO CHECK
B -- GO TO DIAGNOSTIC TROUBLE CODE CHART (LIN COMMUNICATION SYSTEM)
A -- REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - STEERING LOCK ECU)
(a) Disconnect the D8, 1E and D11connectors.





(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 (instrument panel junction block), check that the hybrid control system starts. Make sure the brake pedal is depressed and the shift position is P at this time.
(b) Check that the power switch mode can be changed by pushing the power switch.
HINT: Without depressing the brake pedal, push the power switch repeatedly. Power switch mode should turn from off to on (ACC) to on (IG) and back to off. With the brake pedal depressed, push the power switch repeatedly. Power switch mode should turn to on (READY) from any status.

OK:
Hybrid control system starts normally.
NG -- REPLACE STEERING LOCK ECU
OK -- END (MAIN BODY ECU DEFECTIVE)