LIGHTING SYSTEM Interior Light Power Source Circuit

DTC Code DTC Name
Interior Light Power Source 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.

WIRING DIAGRAM

E262992E01

CAUTION / NOTICE / HINT

Note:

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

PROCEDURE

  1. 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

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

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      No. 4 relay block DOME CUT relay holder terminal 2 - Body ground

      Always

      11 to 14 V

      No. 4 relay block DOME CUT relay holder terminal 5 - Body ground

      Always

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (DOME CUT RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    1. Disconnect the 3C instrument panel junction block assembly 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 3 - 3C-21

      Always

      Below 1 Ω

      3C-21 - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. 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
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    1. Remove the instrument panel junction block assembly.

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

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

      E258628C02

      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      -

      -

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      3C-21 - MB-3 (BCYL)

      Always

      Below 1 Ω

      3C-42 - MB-3 (BCYL)

      Always

      Below 1 Ω

      3E-38 - MB-4 (BCTL)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick hereClick here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY