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LIGHTING SYSTEM Interior Light Auto Cut Circuit

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DTC Code DTC Name
  Interior Light Auto Cut Circuit
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DESCRIPTION

When the battery saving control operates, the main body ECU (multiplex network body ECU) controls the operation of the DOME CUT D relay that is built into the instrument panel junction block assembly to turn off the interior lights.

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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

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

  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

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PROCEDURE


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    PERFORM ACTIVE TEST USING GTS


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

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      1. Body Electrical > Main Body > Active Test
        Tester Display Measurement Item Control Range Diagnostic Note
        Relay for Interior Light Auto Cut Function DOME CUT D relay ON or OFF

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


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

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



      1. Body Electrical > Main Body > Active Test
        Tester Display
        Relay for Interior Light Auto Cut Function




      OK
      All of the interior lights turn off when ON is selected.
      Result
      Proceed to
      OK
      NG

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    CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BATTERY)


    1. B004RQIC06
      *a

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)

      Disconnect the instrument panel junction block assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      5K-1 - Body ground Power switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

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    CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. B004TL6C03
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -

      Remove the instrument panel junction block assembly.

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    2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      5K-1 - 5D-5 Auxiliary battery not connected to 5K-1 and A-23 (DOMR) Below 1 Ω

    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      5D-5 - Auxiliary battery negative (-) terminal

      Auxiliary battery positive (+) → 5K-1

      Auxiliary battery negative (-) → A-23 (DOMR)

      		 Below 1 V
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)Click here

    • NG

      REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLYClick here