LIN COMMUNICATION SYSTEM, Diagnostic DTC:B2786

DTC Code DTC Name
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.

  • Steering lock actuator assembly (steering lock ECU)

  • Certification ECU

  • Harness or connector

WIRING DIAGRAM

A0096INE12

INSPECTION PROCEDURE

Note


  • 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.

  • Inspect the fuses and bulbs for circuits related to this system before performing the following inspection procedure.

Tech Tips

When communication between the steering lock ECU and certification ECU stops, DTC B2785 is also stored.

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs Click here.

      OK
      DTC B2786 is not output.

    NG

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

    OK

    USE SIMULATION METHOD TO CHECK Click here

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


    1. Disconnect the G38 certification ECU connector.

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G38-29 (LIN2) - G35-5 (LIN) Always Below 1 Ω
      G38-29 (LIN2) 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)


    1. A0097DEE05
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Steering Lock Actuator [Steering Lock ECU])

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

    2. 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

    3. 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

    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.


      • for Manual Tilt and Manual Telescopic Steering Column: Click here

      • for Power Tilt and Power Telescopic Steering Column: Click here


    NEXT

  6. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  7. CHECK FOR DTC


    1. Check for DTCs Click here.

      OK
      DTC B2786 is not output.

    NG

    REPLACE CERTIFICATION ECU

    OK

    END (STEERING LOCK ECU IS DEFECTIVE)