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LIN COMMUNICATION SYSTEM, Diagnostic DTC:B2786

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DTC Code DTC Name
B2786 No Response from Steering Lock ECU
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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
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WIRING DIAGRAM

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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.

Tip:

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

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PROCEDURE


  1. Click here

    CLEAR DTC


    1. Clear the DTCs (Click here).


  2. Click here

    CHECK FOR DTC


    1. Check for DTCs (Click here).

      OK
      DTC B2786 is not output.

  3. Click here

    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 (LIN) - G35-5 (LIN) Always Below 1 Ω
      G38-29 (LIN) or G35-5 (LIN) - Body ground Always 10 kΩ or higher

  4. Click here

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


    1. A01DUUCE05

      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
      Table 1. Text in Illustration
      *a

      Front view of wire harness connector

      (to Steering Lock Actuator [Steering Lock ECU])

  5. Click here

    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


  6. Click here

    CLEAR DTC


    1. Clear the DTCs (Click here).


  7. Click here

    CHECK FOR DTC


    1. Check for DTCs (Click here).

      OK
      DTC B2786 is not output.

  8. Click here

    END (STEERING LOCK ECU IS DEFECTIVE)

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    USE SIMULATION METHOD TO CHECKClick here

  10. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  11. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  12. Click here

    REPLACE CERTIFICATION ECU