LIN COMMUNICATION SYSTEM, Diagnostic DTC:B1206

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

DESCRIPTION

This DTC is stored when LIN communication between the master switch and main body ECU (instrument panel junction block assembly) stops for 10 seconds or more.

DTC Code DTC Detection Condition Trouble Area
B1206 No communication between the master switch and main body ECU (instrument panel junction block assembly) for 10 seconds or more.
  • Master switch

  • Main body ECU (instrument panel junction block assembly)

  • Harness or connector

WIRING DIAGRAM

A004NIDE97

CAUTION / NOTICE / HINT

Note


  • When using the intelligent tester with the ignition 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 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 the communication between the master switch and main body ECU (instrument panel junction block assembly) stops, DTC B2325 is also stored.

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT
  2. CHECK FOR DTC


    1. Recheck for DTCs Click here.

      Result
      Result Proceed to
      DTC B1206 is output A
      DTC B1206 is not output B

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

    A004R1JE02
    Text in Illustration
    *1 for LHD
    *2 for RHD
    *3

    Front view of wire harness connector

    (to Main Body ECU)

    *4

    Front view of wire harness connector

    (to Master Switch)


    1. Disconnect the D79 ECU connector.

    2. Disconnect the E14*1 or E8*2 switch connector.

      *1: for LHD

      *2: for RHD

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D79-23 (LIN2) - E14-17 (LIN1)*1 or E8-17 (LIN1)*2 Always Below 1 Ω
      D79-23 (LIN2) - Body ground Always 10 kΩ or higher

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


    1. A004R9XE02
      Text in Illustration
      *1 for LHD
      *2 for RHD
      *3

      Front view of wire harness connector

      (to Master Switch)

      Disconnect the E14*1 or E8*2 switch connector.

      *1: for LHD

      *2: for RHD

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E14-12 (GND)*1 or E8-12 (GND)*2 - Body ground Always Below 1 Ω
      Standard Voltage
      Tester Connection Condition Specified Condition
      E14-11 (B)*1 or E8-11 (B)*2 - Body ground Always 11 to 14 V

    NG
    OK
  5. REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY


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

    2. Clear the DTCs Click here.


    NEXT
  6. CHECK FOR DTC


    1. Recheck for DTCs Click here.

      Result
      Result Proceed to
      DTC B1206 is not output A
      DTC B1206 is output B

    A
    B