LIGHTING SYSTEM Back Door Courtesy Switch Circuit

DTC Code DTC Name
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

E182668E05

CAUTION / NOTICE / HINT

Tip:

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.

      Table 1. 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.

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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

    1. E186108E03

      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

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

    (Click here)

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

    1. U123936E02

      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
      Table 2. 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)

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    REPAIR OR REPLACE HARNESS OR CONNECTOR