Dtc B2285 Steering Lock Position Signal Circuit Malfunction


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC (LIN COMMUNICATION SYSTEM)

CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)

CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)

INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STEERING LOCK ECU)

READ VALUE USING INTELLIGENT TESTER (STEERING UNLOCK SWITCH)

DTC B2285 Steering Lock Position Signal Circuit Malfunction


DESCRIPTION

The power management control ECU and steering lock actuator (steering lock ECU) are connected by a cable and the LIN communication line. This DTC is stored when the steering lock position signal information from the cable and the steering lock position signal information from the LIN communication line are inconsistent.
HINT:
When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) battery terminal, the power source mode is reset to on (IG). When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

DTC Code
DTC Detection Condition
Trouble Area
B2285
The steering lock position signal information from the cable and the steering lock position signal information from the LIN communication line are inconsistent.
  1. AM2 fuse
  2. Steering lock actuator assembly (steering lock ECU)
  3. Power management control ECU
  4. LIN communication system
  5. Harness or connector

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2285 Steering Lock Position Signal Circuit Malfunction


INSPECTION PROCEDURE

NOTICE:
  1. When using the intelligent tester with the engine switch off to troubleshoot: Connect the intelligent tester to the vehicle and turn a courtesy light switch on and off at 1.5 second intervals until communication between the intelligent tester and vehicle begins.
  2. Before performing the inspection, check that there are no problems related to the CAN communication system and LIN communication system.
  3. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  4. After replacing the steering lock actuator assembly (steering lock ECU), perform key ID code registration. Refer to the Service Bulletin for the registration procedure.
1.CHECK FOR DTC (LIN COMMUNICATION SYSTEM)

  1. Clear the DTCs (LandCruiser RM000000YEH0GKX.html).

  1. Check for DTCs (LandCruiser RM000000YEH0GKX.html).

    OK:
    LIN communication system DTCs B2287 and B2785 are not output simultaneously.


NG
GO TO DTC B2287 (LandCruiser RM000002S8G04TX.html)
OK


2.CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2285 Steering Lock Position Signal Circuit Malfunction

  1. Disconnect the G51 power management control ECU connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    G51-2 (AM21) - Body ground
    		Always
    		9.5 to 14 V
    G51-1 (AM22) - Body ground
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to Power Management Control ECU)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)

  1. Disconnect the G51 power management control ECU connector.



    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start 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
    G51-6 (GND) - Body ground
    		Always
    		Below 1 Ω
    G51-5 (GND2) - Body ground
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to Power Management Control ECU)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start 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
    G35-4 (SLP1) - Body ground
    		Steering lock locked
    		10 kΩ or higher
    G35-4 (SLP1) - Body ground
    		Steering lock released
    		Below 1 Ω
    Text in Illustration
    *a
    		Component with harness connected
    (Steering Lock ECU)

Result
Result
Proceed to
OK
A
NG
for Manual Tilt and Manual Telescopic Steering Column
B
for Power Tilt and Power Telescopic Steering Column
C


B
REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) (LandCruiser RM0000039SI030X.html)

C
REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) (LandCruiser RM0000039SI031X.html)
A


5.CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STEERING LOCK ECU)

  1. Disconnect the G51 power management control ECU connector.

  1. Disconnect the G35 steering lock ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G51-3 (SLP) - G35-4 (SLP1)
    		Always
    		Below 1 Ω
    G51-3 (SLP) or G35-4 (SLP1) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.READ VALUE USING INTELLIGENT TESTER (STEERING UNLOCK SWITCH)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / Power Source Control / Data List.

  1. According to the display on the intelligent tester, read the Data List.

    Power Source Control
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Steering Unlock Switch
    		Steering lock condition / ON or OFF
    		ON: Steering lock released (Engine switch on [ACC])
    OFF: Steering lock locked (Engine switch off)
    		-
    OK:
    ON (steering lock released) or OFF (steering lock locked) appears on the screen according to the steering lock condition.

Result
Result
Proceed to
NG
A
OK
for Manual Tilt and Manual Telescopic Steering Column
B
for Power Tilt and Power Telescopic Steering Column
C


B
REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) (LandCruiser RM0000039SI030X.html)

C
REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) (LandCruiser RM0000039SI031X.html)
A

REPLACE POWER MANAGEMENT CONTROL ECU (LandCruiser RM0000039R5026X.html)