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) receives a back door open or closed signal from back door courtesy light switch.

WIRING DIAGRAM

E270021E01

CAUTION / NOTICE / HINT

Note:

When replacing the main body ECU (multiplex network body ECU), make sure to replace it with a new one.

PROCEDURE

  1. READ VALUE USING GTS (BACK DOOR COURTESY LIGHT SWITCH)

    1. Using the GTS, read the Data List.

      Click here

      Body Electrical > Main Body > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Back Door Courtesy SW

      Back door courtesy light 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

      The display is as specified in the normal condition column.

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

  2. INSPECT BACK DOOR LOCK ASSEMBLY

    1. Remove the back door lock assembly.

      Click here

    2. Inspect the back door lock assembly.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE BACK DOOR LOCK ASSEMBLY

    Click here

    OK

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

    1. Disconnect the U12*1 or U13*2 back door lock assembly connector.

      *1: w/o Power Back Door System

      *2: w/ Power Back Door System

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

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

      Standard Resistance

      w/o Power Back Door System

      Tester Connection

      Condition

      Specified Condition

      U12-3 (D+) - 3E-33

      Always

      Below 1 Ω

      U12-1 (ACT-) - Body ground

      Always

      Below 1 Ω

      U12-3 (D+) - Body ground

      Always

      10 kΩ or higher

      w/ Power Back Door System

      Tester Connection

      Condition

      Specified Condition

      U13-3 (CTY) - 3E-33

      Always

      Below 1 Ω

      U13-4 (E) - Body ground

      Always

      Below 1 Ω

      U13-3 (CTY) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    1. E270020N02

      Remove the instrument panel junction block assembly.

      for LHD:

      Click here

      for RHD:

      Click here

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

      for LHD:

      Click here

      for RHD:

      Click here

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A-20 (BCTY) - 3E-33

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    for LHD:

    Click here

    for RHD:

    Click here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    for LHD:

    Click here

    for RHD:

    Click here