LIGHTING SYSTEM Back Door Courtesy Switch Circuit

DTC Code DTC Name
Back Door Courtesy Switch Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) detects the condition of the back door courtesy switch built in the back door lock assembly.

WIRING DIAGRAM

E227473E10

PROCEDURE

  1. READ VALUE USING GTS

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Data List.

    5. Read the Data List according to the display on the GTS.

      Body Electrical > Main Body > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Back Door Courtesy SW

      Back door courtesy switch signal

      ON or OFF

      ON: Back door open

      OFF: Back door closed

      -

      Body Electrical > Main Body > Data List

      Tester Display

      Back Door Courtesy SW

      OK

      Normal conditions listed above are displayed.

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick here

    NG

  2. INSPECT BACK DOOR LOCK ASSEMBLY

    1. Remove the back door lock assembly.

      for Hatchback:Click here

      for WagonClick here

    2. Inspect the back door courtesy switch built in the back door lock assembly.

      for Hatchback:Click here

      for Wagon:Click here

      OK

      Back door lock assembly is normal.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE BACK DOOR LOCK ASSEMBLY

    for Hatchback:Click here

    for Wagon:Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND BODY GROUND)

    1. Disconnect the 3E instrument panel junction block assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      Q3-3 (D+) - 3E-34

      Always

      Below 1 Ω

      Q3-3 (D+) - Body ground

      Always

      10 kΩ or higher

      Q3-2 (ACT-) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    1. Remove the 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.

      E258622C05

      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      -

      -

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      3E-34 - MB-20 (BCTY)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY