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

A002MH8E08
A002MH8E09

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (DOOR COURTESY LIGHT SWITCH)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

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

    5. According to the display on the intelligent tester, 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 ASSEMBLY RH Click here

    D

    INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY LH Click here

    E

    INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY RH Click here

    B

  2. INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH


    1. A002O9HE17
      *1 Not pushed
      *2 Pushed
      *3 Switch Body

      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 ASSEMBLY LH Click here

    OK

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


    1. A002O42E02
      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

      Disconnect the N30 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
      N30-1 - DA-21 (DCTY) Always Below 1 Ω
      N30-1 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      N30-1 - DA-24 (PCTY) Always Below 1 Ω
      N30-1 - 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 ASSEMBLY RH


    1. A002O9HE18
      *1 Not pushed
      *2 Pushed
      *3 Switch Body

      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 ASSEMBLY RH Click here

    OK

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


    1. A002LSNE02
      Text in Illustration
      *1 for LHD
      *2 for RHD
      *3

      Front view of wire harness connector

      (to Front Door Courtesy Light Switch RH)
      *4

      Front view of wire harness connector

      (to Main Body ECU)

      Disconnect the O20 front door courtesy light switch RH connector.

    2. Disconnect the DE*1 or DC*2 main body ECU connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      O20-1 - DE-20 (PCTY) Always Below 1 Ω
      O20-1 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      O20-1 - DC-6 (DCTY) Always Below 1 Ω
      O20-1 - 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 ASSEMBLY LH


    1. A002O9HE19
      *1 Not pushed
      *2 Pushed
      *3 Switch Body

      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 ASSEMBLY LH Click here

    OK

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


    1. A002POZE02
      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)

      Disconnect the N31 rear door courtesy light switch LH connector.

    2. Disconnect the H79 main body ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N31-1 - H79-8 (LCTY) Always Below 1 Ω
      N31-1 - 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 ASSEMBLY RH


    1. A002O9HE20
      *1 Not pushed
      *2 Pushed
      *3 Switch Body

      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 ASSEMBLY RH Click here

    OK

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


    1. A002M4RE02
      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)

      Disconnect the O21 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
      O21-1 - DE-19 (RCTY) Always Below 1 Ω
      O21-1 - Body ground Always 10 kΩ or higher

    OK

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR