LIN COMMUNICATION SYSTEM, Diagnostic DTC:B1206

DTC Code DTC Name
B1206 P/W Master Switch Communication Stop

DESCRIPTION

This DTC is output when LIN communication between the master switch assembly and main body ECU stops for 10 seconds or more.

DTC Code DTC Detection Condition Trouble Area
B1206 No communication between master switch assembly and main body ECU for 10 seconds or more

  • Master switch assembly

  • Main body ECU

  • Harness or connector

WIRING DIAGRAM

A000Y8LE02

CAUTION / NOTICE / HINT

Note

When using the intelligent tester with the power switch off to troubleshoot:

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

Tech Tips

DTC B2325 is output when the communication between all of the following components and main body ECU stops.

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTC Click here.


    NEXT

  2. CHECK FOR DTC


    1. Recheck for DTC Click here.

      Result:
      Result Proceed to
      DTC B1206 output reoccurs A
      DTC B1206 output does not reoccur B

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - MASTER SWITCH)

    A000VHDE02
    *1 Rear view of wire harness connector: (to Main Body ECU)
    *2 Rear view of wire harness connector: (to Master Switch)

    1. Disconnect the L11 ECU connector.

    2. Disconnect the N13 switch connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      L11-10 (LIN2) - N13-17 (LIN1) Always Below 1 Ω
      L11-10 (LIN2) or N13-17 (LIN1) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (MASTER SWITCH - BATTERY AND BODY GROUND)


    1. A000WVEE02
      *1 Front view of wire harness connector: (to Master Switch)

      Disconnect the N13 switch connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      N13-12 (GND) - Body ground Always Below 1 Ω
      Standard voltage
      Tester Connection Condition Specified Condition
      N13-11 (B) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK MASTER SWITCH ASSEMBLY (OPERATION)


    1. Temporarily replace the master switch assembly with a new or normally functioning one Click here.

    2. Clear the DTC Click here.


    NEXT

  6. CHECK FOR DTC


    1. Recheck for DTC Click here.

      Result:
      Result Proceed to
      DTC B1206 output does not reoccur A
      DTC B1206 output reoccurs B

    A

    END (MASTER SWITCH IS DEFECTIVE)

    B

    REPLACE MAIN BODY ECU