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 power window regulator master switch assembly and main body ECU (multiplex network body ECU) stops for 10 seconds or more.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B1206

P/W Master Switch Communication Stop

No communication between power window regulator master switch assembly and main body ECU (multiplex network body ECU) for 10 seconds or more.

  • Power window regulator master switch assembly

  • Main body ECU (multiplex network body ECU)

  • Instrument panel junction block assembly

  • Wire harness or connector

  • ECU-B NO. 2 fuse

WIRING DIAGRAM

B315277E21

CAUTION / NOTICE / HINT

Note:

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

PROCEDURE

  1. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    1. Remove the instrument panel junction block assembly.

      for LHD:Click hereClick here

      for RHD:Click hereClick here

      B330524C03

      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      -

      -

    2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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

      Tip:

      This inspection is to check the LIN communication line in the instrument panel junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU).

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      3C-22 - MB-16 (LIN2)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    for LHD:Click hereClick here

    for RHD:Click hereClick here

    OK

  2. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY)

    1. for LHD

      1. Disconnect the H12 power window regulator master switch assembly connector.

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

        Standard Resistance

        Tester Connection

        Condition

        Specified Condition

        3C-22 - H12-17 (LIN1)

        Always

        Below 1 Ω

        H12-17 (LIN1) - Body ground

        Always

        10 kΩ or higher

        3C-22 - Body ground

        Always

        10 kΩ or higher

    2. for RHD

      1. Disconnect the G3 power window regulator master switch assembly connector.

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

        Standard Resistance

        Tester Connection

        Condition

        Specified Condition

        3C-22 - G3-17 (LIN1)

        Always

        Below 1 Ω

        G3-17 (LIN1) - Body ground

        Always

        10 kΩ or higher

        3C-22 - Body ground

        Always

        10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY - BATTERY, BODY GROUND)

    1. for LHD

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

        Standard Voltage

        Tester Connection

        Condition

        Specified Condition

        H12-11 (B) - H12-12 (GND)

        Always

        11 to 14 V

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

        Standard Resistance

        Tester Connection

        Condition

        Specified Condition

        H12-12 (GND) - Body ground

        Always

        Below 1 Ω

    2. for RHD

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

        Standard Voltage

        Tester Connection

        Condition

        Specified Condition

        G3-11 (B) - G3-12 (GND)

        Always

        11 to 14 V

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

        Standard Resistance

        Tester Connection

        Condition

        Specified Condition

        G3-12 (GND) - Body ground

        Always

        Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY

    1. Replace the power window regulator master switch assembly.

      Click hereClick here

    Result

    Proceed to

    NEXT
    NEXT

  5. CHECK DTC OUTPUT

    1. Clear the DTCs.

      Click here

      Body Electrical > Main Body > Clear DTCs

    2. Recheck for DTCs.

      Body Electrical > Main Body > Trouble Codes

      OK

      DTC B1206 is not output.

    Result

    Proceed to

    OK

    NG
    OK

    END (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY WAS DEFECTIVE)

    NG

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    for LHD:Click hereClick here

    for RHD:Click hereClick here