LIGHTING SYSTEM Interior Light Circuit

DESCRIPTION

The illuminated entry system controls the No. 1 room light assembly and map light assembly*.


WIRING DIAGRAM

A005MH9E02

CAUTION / NOTICE / HINT

Tech Tips

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

Note

Initialization is necessary when the main body ECU (multiplex network body ECU) is replaced* Click here.


  • *: w/ Automatic Light Control System

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (ILLUMINATED ENTRY SYSTEM)


    1. Using the intelligent tester, perform the Active Test Click here.

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Illuminated Entry System

      • No. 1 room light assembly

      • Engine switch*1

      • Map light assembly*2

      		 ON / OFF No. 1 room light and map light switches at DOOR position and all doors closed.

      • *1: w/ Entry and Start System

      • *2: w/ Glass Roof

      OK
      The illuminated entry system operates normally when operating it using the Active Test.
      Result
      Result Proceed to
      NG A
      OK B

    B

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

    A

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE - INSTRUMENT PANEL JUNCTION BLOCK)


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

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      3C-4 - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT NO. 1 ROOM LIGHT ASSEMBLY


    1. Remove the No. 1 room light assembly Click here.

    2. Inspect the No. 1 room light assembly Click here.


    NG

    REPLACE NO. 1 ROOM LIGHT ASSEMBLY Click here

    OK

  4. CHECK VEHICLE CONDITION


    1. Check the vehicle condition.

      Result
      Result Proceed to
      w/o Glass Roof A
      w/ Glass Roof B

    B

    INSPECT MAP LIGHT ASSEMBLY Click here

    A

  5. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - NO. 1 ROOM LIGHT)


    1. Remove the room light bulb from the No. 1 room light assembly.

    2. Disconnect the 3A and 3B instrument panel junction block assembly connectors.

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

      A005LOWE02
      Text in Illustration
      *a Room Light Switch Base *b

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)
      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      L3-1 - 3A-5 Always Below 1 Ω
      L3-3 - 3B-6 Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      L3-1 - Body ground Always 10 kΩ or higher
      L3-3 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      NG A
      OK B

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    B

    INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

  6. INSPECT MAP LIGHT ASSEMBLY


    1. Remove the map light assembly Click here.

    2. Inspect the map light assembly Click here.


    NG

    REPLACE MAP LIGHT ASSEMBLY Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - NO. 1 ROOM LIGHT)


    1. Remove the room light bulb from the No. 1 room light assembly.

    2. Disconnect the 3A and 3B instrument panel junction block assembly connectors.

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

      A005LOWE02
      Text in Illustration
      *a Room Light Switch Base *b

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)
      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      L3-1 - 3A-5 Always Below 1 Ω
      L3-3 - 3B-6 Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      L3-1 - Body ground Always 10 kΩ or higher
      L3-3 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - MAP LIGHT)


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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      L1-1 - 3A-5 Always Below 1 Ω
      L1-3 - 3B-6 Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      L1-1 - Body ground Always 10 kΩ or higher
      L1-3 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. 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.

      A005GZFE01
      Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      3A-5 - 3C-4 Always Below 1 Ω
      3B-6 - MB-1 (ILE) Always Below 1 Ω

    OK

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

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here