LIGHTING SYSTEM 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

A00YPT4E02

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 power switch on (IG).

    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 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) for RHD: Click here
    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for LHD: Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR