LIGHTING SYSTEM Back Door Courtesy Switch Circuit

DESCRIPTION

The main body ECU receives a No. 2 room light information signal from the back door courtesy light switch, and illuminates the No. 2 room light.

WIRING DIAGRAM

A01IN0KE03

INSPECTION PROCEDURE

Tech Tips

Inspect the fuses and bulbs for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (BACK DOOR COURTESY 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 / Back Door Courtesy Switch.

    5. Use the Data List to check if the back door courtesy light switch is operating properly.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Back Door Courtesy Switch Back door courtesy light switch / ON or OFF

      ON: Back door courtesy light switch on

      OFF: Back door courtesy light switch off

      		 -
      OK
      Tester display changes according to opening and closing of back door.

    NG

    INSPECT BACK DOOR LOCK ASSEMBLY (BACK DOOR COURTESY LIGHT SWITCH) Click here

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

  2. INSPECT BACK DOOR LOCK ASSEMBLY (BACK DOOR COURTESY LIGHT SWITCH)


    1. A01IUONE02

      Remove the back door lock assembly (back door courtesy light switch) Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (ACT-) - 3 (D+) Back door closed 10 kΩ or higher
      Back door opened Below 1 Ω

    NG

    REPLACE BACK DOOR LOCK ASSEMBLY (BACK DOOR COURTESY LIGHT SWITCH) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - MAIN BODY ECU AND BODY GROUND)


    1. A01IR88E01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Back Door Lock Assembly)
      *2

      Front view of wire harness connector

      (to Main Body ECU)

      Disconnect the S8 back door lock assembly (back door courtesy light switch) connector.

    2. Disconnect the DA main body ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      DA-7 (BCTY) - S8-3 (D+) Always Below 1 Ω
      S8-1 (ACT-) - Body ground Always Below 1 Ω
      S8-3 (D+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)