Dtc B2786 No Response From Steering Lock Ecu


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CLEAR DTC

CHECK FOR DTC

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - STEERING LOCK ECU)

CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - BATTERY AND BODY GROUND)

REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

CLEAR DTC

CHECK FOR DTC

DTC B2786 No Response from Steering Lock ECU


DESCRIPTION

This DTC is stored when LIN communication between the certification ECU and steering lock actuator assembly (steering lock ECU) stops for 10 seconds or more.

DTC Code
DTC Detection Condition
Trouble Area
B2786
LIN communication between the certification ECU and steering lock ECU stops for 10 seconds or more.
  1. Steering lock actuator assembly (steering lock ECU)
  2. Certification ECU
  3. Harness or connector

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System. Dtc B2786 No Response From Steering Lock Ecu


INSPECTION PROCEDURE

NOTICE:
  1. When using the intelligent tester with the ignition 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. Inspect the fuses and bulbs for circuits related to this system before performing the following inspection procedure.
HINT:
When communication between the steering lock ECU and certification ECU stops, DTC B2785 is also stored.
1.CLEAR DTC

  1. Clear the DTCs (LandCruiser RM000002S8D045X.html).


NEXT


2.CHECK FOR DTC

  1. Check for DTCs (LandCruiser RM000002S8D045X.html).

    OK:
    DTC B2786 is not output.


NG
Go to step 3
OK

USE SIMULATION METHOD TO CHECK (LandCruiser RM000003YMJ00XX.html)

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

  1. Disconnect the G38 certification ECU connector.

  1. Disconnect the G35 steering lock actuator assembly (steering lock ECU) connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G38-29 (LIN) - G35-5 (LIN)
    		Always
    		Below 1 Ω
    G38-29 (LIN) or G35-5 (LIN) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - BATTERY AND BODY GROUND)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System. Dtc B2786 No Response From Steering Lock Ecu

  1. Disconnect the G35 steering lock actuator assembly (steering lock ECU) connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G35-1 (GND) - Body ground
    		Always
    		Below 1 Ω

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    G35-6 (IG2) - Body ground
    		Ignition switch ON
    		11 to 14 V
    G35-7 (B) - Body ground
    		Always
    		11 to 14 V
Text in Illustration
*a
Front view of wire harness connector
(to Steering Lock Actuator [Steering Lock ECU])


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

  1. Temporarily replace the steering lock actuator assembly (steering lock ECU) with a new one.

    1. for Manual Tilt and Manual Telescopic Steering Column: LandCruiser RM0000039SJ01JX.html
    2. for Power Tilt and Power Telescopic Steering Column: LandCruiser RM0000039SJ01KX.html

NEXT


6.CLEAR DTC

  1. Clear the DTCs (LandCruiser RM000002S8D045X.html).


NEXT


7.CHECK FOR DTC

  1. Check for DTCs (LandCruiser RM000002S8D045X.html).

    OK:
    DTC B2786 is not output.


NG
REPLACE CERTIFICATION ECU
OK

END (STEERING LOCK ECU IS DEFECTIVE)