LIGHTING SYSTEM Door Courtesy Switch Circuit

DESCRIPTION

The main body ECU receives a door open/closed signal from each door courtesy light switch.

WIRING DIAGRAM

A004SW8E01
A004SW8E02

CAUTION / NOTICE / HINT

Note

As the door control battery is installed between the vehicle battery and main body ECU (instrument panel junction block assembly), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (instrument panel junction block assembly) before performing this troubleshooting procedure.

PROCEDURE


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


    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 / Main Body / Data List.

    5. According to the display on the GTS, read the Data List.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      D Door Courtesy SW Driver side door courtesy light switch signal / ON or OFF

      ON: Driver side door courtesy light switch on

      OFF: Driver side door courtesy light switch off

      		 -
      P Door Courtesy SW Front passenger side door courtesy light switch signal / ON or OFF

      ON: Front passenger side door courtesy light switch on

      OFF: Front passenger side door courtesy light switch off

      		 -
      RL Door Courtesy SW Rear door courtesy light switch LH signal / ON or OFF

      ON: Rear door courtesy light switch LH on

      OFF: Rear door courtesy light switch LH off

      		 -
      RR Door Courtesy SW Rear door courtesy light switch RH signal / ON or OFF

      ON: Rear door courtesy light switch RH on

      OFF: Rear door courtesy light switch RH off

      		 -
      Result
      Result Proceed to
      OK A
      NG (Front door courtesy light switch LH does not operate) B
      NG (Front door courtesy light switch RH does not operate) C
      NG (Rear door courtesy light switch LH does not operate) D
      NG (Rear door courtesy light switch RH does not operate) E

    A

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    C

    INSPECT FRONT DOOR COURTESY LIGHT SWITCH RH Click here

    D

    INSPECT REAR DOOR COURTESY LIGHT SWITCH LH Click here

    E

    INSPECT REAR DOOR COURTESY LIGHT SWITCH RH Click here

    B

  2. INSPECT FRONT DOOR COURTESY LIGHT SWITCH LH

    A004TGQE09
    *1 Component without harness connected: (Front Door Courtesy Light Switch LH)
    *2 Not pushed
    *3 Pushed
    *4 Switch body

    1. Remove the front door courtesy light switch LH Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - Switch body Not pushed Below 1 Ω
      Pushed 10 kΩ or higher

    NG

    REPLACE FRONT DOOR COURTESY LIGHT SWITCH LH Click here

    OK

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

    A004SOLE02
    Text in Illustration
    *1

    Front view of wire harness connector

    (to Front Door Courtesy Light Switch LH)
    *2

    Front view of wire harness connector

    (to Main Body ECU)
    *3 for LHD
    *4 for RHD

    1. Disconnect the G1 front door courtesy light switch LH connector.

    2. Disconnect the DA main body ECU connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      G1-1 - DA-21 (DCTY) Always Below 1 Ω
      G1-1 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      G1-1 - DA-24 (PCTY) Always Below 1 Ω
      G1-1 - Body ground Always 10 kΩ or higher

    OK

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. INSPECT FRONT DOOR COURTESY LIGHT SWITCH RH

    A004TGQE10
    *1 Component without harness connected: (Front Door Courtesy Light Switch RH)
    *2 Not pushed
    *3 Pushed
    *4 Switch body

    1. Remove the front door courtesy light switch RH Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - Switch body Not pushed Below 1 Ω
      Pushed 10 kΩ or higher

    NG

    REPLACE FRONT DOOR COURTESY LIGHT SWITCH RH Click here

    OK

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

    A004TMHE02
    Text in Illustration
    *1

    Front view of wire harness connector

    (to Front Door Courtesy Light Switch RH)
    *2

    Front view of wire harness connector

    (to Main Body ECU [for LHD])
    *3

    Front view of wire harness connector

    (to Main Body ECU [for RHD])

    1. Disconnect the H1 front door courtesy light switch RH connector.

    2. Disconnect the DE or DC main body ECU connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      H1-1 - DE-20 (PCTY) Always Below 1 Ω
      H1-1 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      H1-1 - DC-6 (DCTY) Always Below 1 Ω
      H1-1 - Body ground Always 10 kΩ or higher

    OK

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. INSPECT REAR DOOR COURTESY LIGHT SWITCH LH

    A004TGQE11
    *1 Component without harness connected: (Rear Door Courtesy Light Switch LH)
    *2 Not pushed
    *3 Pushed
    *4 Switch body

    1. Remove the rear door courtesy light switch LH Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - Switch body Not pushed Below 1 Ω
      Pushed 10 kΩ or higher

    NG

    REPLACE REAR DOOR COURTESY LIGHT SWITCH LH Click here

    OK

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

    A004PX0E02
    Text in Illustration
    *1

    Front view of wire harness connector

    (to Rear Door Courtesy Light Switch LH)
    *2

    Front view of wire harness connector

    (to Main Body ECU)

    1. Disconnect the G3 rear door courtesy light switch LH connector.

    2. Disconnect the D79 main body ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G3-1 - D79-8 (LCTY) Always Below 1 Ω
      G3-1 - Body ground Always 10 kΩ or higher

    OK

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. INSPECT REAR DOOR COURTESY LIGHT SWITCH RH

    A004TGQE12
    *1 Component without harness connected: (Rear Door Courtesy Light Switch RH)
    *2 Not pushed
    *3 Pushed
    *4 Switch body

    1. Remove the rear door courtesy light switch RH Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - Switch body Not pushed Below 1 Ω
      Pushed 10 kΩ or higher

    NG

    REPLACE REAR DOOR COURTESY LIGHT SWITCH RH Click here

    OK

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

    A004OLNE02
    Text in Illustration
    *1

    Front view of wire harness connector

    (to Rear Door Courtesy Light Switch RH)
    *2

    Front view of wire harness connector

    (to Main Body ECU)

    1. Disconnect the H3 rear door courtesy light switch RH connector.

    2. Disconnect the DE main body ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H3-1 - DE-19 (RCTY) Always Below 1 Ω
      H3-1 - Body ground Always 10 kΩ or higher

    OK

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR