LIGHTING SYSTEM Interior Light Auto Cut Circuit

DTC Code DTC Name
Interior Light Auto Cut Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls operation of the DOME CUT relay in order to supply power to the interior lights. When the battery saving function operates while the interior lights are on, the main body ECU (multiplex network body ECU) opens the DOME CUT relay to turn off the lights.

WIRING DIAGRAM

E262991E01

INSPECTION PROCEDURE

Note:

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

PROCEDURE

  1. PERFORM ACTIVE TEST USING GTS

    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 Electrical / Main Body / Active Test.

    5. Perform the Active Test according to the display on the GTS.

      Body Electrical > Main Body > Active Test

      Tester Display

      Measurement Item

      Control Range

      Diagnostic Note

      Relay for Interior Light Auto Cut Function

      DOME CUT relay

      ON or OFF

      • ON: DOME CUT relay off (interior lights turn off)

      • OFF: DOME CUT relay on (interior lights turn on)

      When performing this active test, turn on all the interior lights.

      Body Electrical > Main Body > Active Test

      Tester Display

      Relay for Interior Light Auto Cut Function

      OK

      DOME CUT relay operates normally.

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick hereClick here

    NG

  2. INSPECT DOME CUT RELAY

    1. Remove the DOME CUT relay from the No. 4 relay block.

    2. Inspect the DOME CUT relay.

      Click here

      OK

      DOME CUT relay is normal.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE DOME CUT RELAY

    OK

  3. CHECK HARNESS AND CONNECTOR (DOME CUT RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

    1. Disconnect the E22 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      No. 4 relay block DOME CUT relay holder terminal 1 - E22-15 (DOMR)

      Always

      Below 1 Ω

      E22-15 (DOMR) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR