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 the DOME CUT relay.

WIRING DIAGRAM

E270025E01

CAUTION / NOTICE / HINT

Note:

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

  • When replacing the main body ECU (multiplex network body ECU), make sure to replace it with a new one.

PROCEDURE

  1. READ VALUE USING GTS (DOME CUT RELAY)

    1. Using the GTS, read the Data List.

      Click hereClick here

      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

      -

      Body Electrical > Main Body > Active Test

      Tester Display

      Relay for Interior Light Auto Cut Function

      OK

      Battery saving control (interior light auto cut function) operates.

    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. E270015N01

      Remove the DOME CUT relay from the No. 5 relay block*1 or No. 4 relay block*2.

      *1: for LHD

      *2: for RHD

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      3 - 5

      Battery voltage not applied between terminals 1 and 2

      10 kΩ or higher

      3 - 5

      Battery voltage applied between terminals 1 and 2

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE DOME CUT RELAY

    OK

  3. CHECK HARNESS AND CONNECTOR (BATTERY - DOME CUT RELAY)

    1. E270100C01

      *A

      for LHD

      *B

      for RHD

      *a

      Front view of wire harness connector

      (to DOME CUT Relay)

      Remove the DOME CUT relay from the No. 5 relay block*1 or No. 4 relay block*2.

      *1: for LHD

      *2: for RHD

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      DOME CUT relay terminal 2 - Body ground

      Always

      11 to 14 V

      DOME CUT relay terminal 5 - Body ground

      Always

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (DOME CUT RELAY - MAIN BODY ECU)

    1. Remove the DOME CUT relay from the No. 5 relay block*1 or No. 4 relay block*2.

      *1: for LHD

      *2: for RHD

    2. Disconnect the G78 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      DOME CUT relay terminal 1 - G78-15 (DOMR)

      Always

      Below 1 Ω

      G78-15 (DOMR) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    for LHD:

    Click here

    for RHD:

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR