LIGHTING SYSTEM Interior Light Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the operation of the following lights:


Tech Tips

The LIGHT CUT relay supplies power to the lights not controlled by the illuminated entry system. If all the lights that use power from the LIGHT CUT relay do not turn on, check the LIGHT CUT relay circuit first Click here.


WIRING DIAGRAM

A01HTNTE03
A01HU6WE03

INSPECTION PROCEDURE

Note


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

PROCEDURE


  1. PERFORM ACTIVE TEST USING TECHSTREAM


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Body Electrical / Main Body / Active Test.

    5. Check that the lights operate.

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Illuminated Entry System Personal light*2 and rear interior light ON/OFF

      • No. 1 room light assembly switch in DOOR position*1

      • Interior light door switch is on*2

      • *1: w/o Sliding Roof

      • *2: w/ Sliding Roof

      OK
      Each light fades in.
      Result
      Result Proceed to
      OK A
      NG (w/o Sliding Roof) B
      NG (w/ Sliding Roof) C

    B

    CHECK HARNESS AND CONNECTOR (LIGHT CUT RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Click here

    C

    INSPECT ROOF CONSOLE BOX ASSEMBLY Click here

    A

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  2. CHECK HARNESS AND CONNECTOR (LIGHT CUT RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 3B instrument panel junction block assembly connector.

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

      Tech Tips

      Perform the check under the following conditions:


      • No. 1 room light assembly switch in DOOR position

      Standard Voltage
      Tester Connection Condition Specified Condition
      3B-35 - Body ground Power switch off 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly Click here.

    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.

      A01HVIGE06
      Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      3B-35 - MB-1 (ILE) Always Below 1 Ω

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

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

  4. INSPECT ROOF CONSOLE BOX ASSEMBLY


    1. Remove the roof console box assembly Click here.

    2. Inspect the roof console box assembly Click here.

      OK
      Roof console box assembly is normal.

    NG

    REPLACE ROOF CONSOLE BOX ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (LIGHT CUT RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Install the roof console box assembly Click here.

    2. Disconnect the 3B instrument panel junction block assembly connector.

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

      Tech Tips

      Perform the check under the following conditions:


      • Interior light door switch on

      Standard Voltage
      Tester Connection Condition Specified Condition
      3B-35 - Body ground Power switch off 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly Click here.

    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.

      A01HVIGE06
      Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      3B-35 - MB-1 (ILE) Always Below 1 Ω

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

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