Dtc B2285 Steering Lock Position Signal Circuit Malfunction

Vehicle Interior. Corolla. Zre142 Aze141
Theft Deterrent Keyless Entry. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING TECHSTREAM

CHECK FOR DTC

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - STEERING LOCK ECU)

CHECK MAIN BODY ECU OPERATION

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 cable from 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 (COROLLA_ZRE142 RM000000QYF05AX.html).

DTC No.
DTC Detection Condition
Trouble Area
B2285
Cable and LIN information between the main body ECU (instrument panel junction block) and the steering lock ECU are inconsistent
  1. Main body ECU (instrument panel junction block)
  2. Steering lock ECU
  3. Wire harness or connector

WIRING DIAGRAM


Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function). Dtc B2285 Steering Lock Position Signal Circuit Malfunction


INSPECTION PROCEDURE

1.READ VALUE USING TECHSTREAM

  1. Connect the Techstream to the DLC3.

  1. Check the Data List for proper functioning of the steering lock function.

    HINT:
    When using the 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 Techstream and vehicle starts.

    Main Body
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Steering Unlock Switch
    		Steering lock condition / ON or OFF
    		ON: Steering is unlocked (Engine switch on (ACC))
    OFF: Steering is locked (Engine switch off)
    		-
    OK:
    ON (steering is unlocked) and OFF (steering is locked) appear on the screen.


NG
Go to step 3
OK


2.CHECK FOR DTC

  1. Clear the DTCs (COROLLA_ZRE142 RM000000YEH0CGX.html).

  1. 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:
    Display (DTC output)
    		Proceed to
    "DTC B2285" only
    		A
    "DTC B2287" and/or "DTC B2785"
    		B
    No DTC
    		C
    HINT:
    1. If DTC B2287 is output (COROLLA_ZRE142 RM000000XEY072X.html).
    2. If DTC B2785 is output (COROLLA_ZRE142 RM000002XHV07AX.html).


B
GO TO DTC CHART (COROLLA_ZRE142 RM000002XHJ04PX.html)

C
CHECK INTERMITTENT PROBLEMS
A

REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

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


  1. Disconnect the E50, 2C and E39 ECU connectors.


    Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function). Dtc B2285 Steering Lock Position Signal Circuit Malfunction

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E50-18 (SLP) - E39-4 (SLP1)
    		Always
    		Below 1 Ω
    2C-12 (LIN1) - E39-5 (LIN)
    		Always
    		Below 1 Ω
    E50-18 (SLP) or E39-4 (SLP1) - Body ground
    		Always
    		10 kΩ or higher
    2C-12 (LIN1) or E39-5 (LIN) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK MAIN BODY ECU OPERATION

  1. 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.

  1. 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 starts normally.


NG
REPLACE STEERING LOCK ECU (COROLLA_ZRE142 RM000000UD005GX_01_0019.html)
OK

END (MAIN BODY ECU DEFECTIVE)