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 the steering lock ECU (steering lock actuator assembly) stops for more than 10 seconds.

DTC No. DTC Detection Condition Trouble Area
B2786 No communication between the steering lock ECU (steering lock actuator assembly) and the certification ECU (smart key ECU assembly) for more than 10 seconds

  • Steering lock ECU (steering lock actuator assembly)

  • Certification ECU (smart key ECU assembly)

  • Wire harness or connector

  • Fuse

WIRING DIAGRAM

A0160ETE01

INSPECTION PROCEDURE

Note


  • If the certification ECU (smart key ECU assembly) is replaced, register the key.

  • If the steering lock ECU (steering lock actuator assembly) is replaced, register the ECU code.

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTC Click here.

    2. Recheck for DTC.

      OK
      B2786 is not output.

    NG

    CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU BATTERY VOLTAGE AND GROUND) Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  2. CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU BATTERY VOLTAGE AND GROUND)


    1. A01624NE01

      Disconnect the J29 ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J29-1 (GND) - Body ground Always Below 1 Ω
      Standard Voltage
      Tester Connection Condition Specified Condition
      J29-7 (B) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR, OR REPLACE FUSE

    OK

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


    1. A0160XME01

      Disconnect the P33 ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P33-10 (LIN) - J29-5 (LIN) Always Below 1 Ω
      P33-10 (LIN) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Replace the steering lock ECU (steering lock actuator assembly).


    NEXT

  5. CHECK FOR DTC


    1. Clear the DTC Click here.

    2. Recheck for DTC.

      OK
      B2786 is not output.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

    END (STEERING LOCK ECU IS DEFECTIVE)