LIGHTING SYSTEM Door Courtesy Switch Circuit

DTC Code DTC Name
Door Courtesy Switch Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) receives a door open or closed signal from each door courtesy light switch.

WIRING DIAGRAM

E270019E02

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 (DOOR COURTESY LIGHT SWITCH)

    1. Using the GTS, read the Data List.

      Click hereClick here

      Body Electrical > Main Body > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      RR Door Courtesy SW

      Rear door courtesy light switch RH signal

      ON or OFF

      ON: Rear door RH open

      OFF: Rear door RH closed

      -

      RL Door Courtesy SW

      Rear door courtesy light switch LH signal

      ON or OFF

      ON: Rear door LH open

      OFF: Rear door LH closed

      -

      FR Door Courtesy SW

      Front door courtesy light switch RH signal

      ON or OFF

      ON: Front door RH open

      OFF: Front door RH closed

      -

      FL Door Courtesy SW

      Front door courtesy light switch LH signal

      ON or OFF

      ON: Front door LH open

      OFF: Front door LH closed

      -

      Body Electrical > Main Body > Data List

      Tester Display

      RR Door Courtesy SW

      RL Door Courtesy SW

      FR Door Courtesy SW

      FL Door Courtesy SW

      OK

      Normal conditions listed above are displayed.

    Result

    Result

    Proceed to

    OK

    A

    NG (Front door courtesy light switch assembly RH does not operate)

    B

    NG (Front door courtesy light switch assembly LH does not operate)

    C

    NG (Rear door courtesy light switch assembly RH does not operate)

    D

    NG (Rear door courtesy light switch assembly LH does not operate)

    E
    A

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick hereClick here

    C

    INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LHClick here

    D

    INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY RHClick here

    E

    INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY LHClick here

    B

  2. INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH

    1. Remove the front door courtesy light switch assembly RH.

      Click here

    2. Inspect the front door courtesy light switch assembly RH.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH

    Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH - MAIN BODY ECU)

    1. Disconnect the M4 front door courtesy light switch assembly RH connector.

    2. Disconnect the G78 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      M4-1 - G78-19 (FRCY)

      Always

      Below 1 Ω

      M4-1 - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    for LHD:

    Click here

    for RHD:

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH

    1. Remove the front door courtesy light switch assembly LH.

      Click here

    2. Inspect the front door courtesy light switch assembly LH.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH

    Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    1. Disconnect the N6 front door courtesy light switch assembly LH connector.

    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

      Tester Connection

      Condition

      Specified Condition

      N6-1 - 3E-40 (FLCY)

      Always

      Below 1 Ω

      N6-1 - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    1. E270020N01

      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-2 (FLCY) - 3E-40

      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

  7. INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY RH

    1. Remove the rear door courtesy light switch assembly RH.

      Click here

    2. Inspect the rear door courtesy light switch assembly RH.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY RH

    Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY RH - MAIN BODY ECU)

    1. Disconnect the M6 rear door courtesy light switch assembly RH connector.

    2. Disconnect the G78 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      M6-1 - G78-6 (RCTY)

      Always

      Below 1 Ω

      M6-1 - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    for LHD:

    Click here

    for RHD:

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY LH

    1. Remove the rear door courtesy light switch assembly LH.

      Click here

    2. Inspect the rear door courtesy light switch assembly LH.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY LH

    Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY LH - MAIN BODY ECU)

    1. Disconnect the N8 rear door courtesy light switch assembly LH connector.

    2. Disconnect the G78 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance

      w/ Side Marker Light

      Tester Connection

      Condition

      Specified Condition

      N8-1 - G78-1 (LCTY)

      Always

      Below 1 Ω

      N8-1 - Body ground

      Always

      10 kΩ or higher

      w/o Side Marker Light

      Tester Connection

      Condition

      Specified Condition

      N8-1 - G78-24 (LCTY)

      Always

      Below 1 Ω

      N8-1 - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    for LHD:

    Click here

    for RHD:

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR