LIN COMMUNICATION SYSTEM, Diagnostic DTC:B2786

DTC Code DTC Name
B2786 No Response from Steering Lock ECU

DESCRIPTION

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

DTC Code DTC Detection Condition Trouble Area
B2786 Periodic transmission from steering lock actuator assembly stops for 10 seconds or more

  • Certification ECU (smart key ECU assembly)

  • Steering lock actuator assembly

  • Harness or connector

WIRING DIAGRAM

A01BDJHE05

INSPECTION PROCEDURE

Note


  • When using the GTS with the engine switch off to troubleshoot:

    Connect the GTS to the vehicle, and turn a courtesy switch on and off at 1.5 second intervals until communication between the GTS and vehicle begins.

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

  • Before replacing the certification ECU (smart key ECU assembly), refer to the smart entry and start system (for Entry Function) Click here.

Tech Tips

DTC B2785 is output when the communication between all of the following components and certification ECU (smart key ECU assembly) stops.

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 [SMART KEY ECU ASSEMBLY] - STEERING LOCK ACTUATOR ASSEMBLY) Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  3. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - STEERING LOCK ACTUATOR ASSEMBLY)


    1. Disconnect the B75 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the H80 steering lock actuator assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B75-5 (LIN) - H80-5 (LIN) Always Below 1 Ω
      B75-5 (LIN) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    A01BCIGE04
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Steering Lock Actuator Assembly)

    1. Disconnect the steering lock actuator assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H80-1 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H80-7 (B) - Body ground Always 11 to 14 V
      H80-6 (IG2) - Body ground Engine switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE STEERING LOCK ACTUATOR ASSEMBLY


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

    OK

    END (STEERING LOCK ACTUATOR ASSEMBLY IS DEFECTIVE)