LIGHTING SYSTEM(except 5L-E) Interior Light Switch Signal Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) detects the condition of the room light switch assembly.

WIRING DIAGRAM

B001GG9E02

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. READ VALUE USING GTS


    1. Read the Data List according to the display on the GTS.

      Click here

      Main Body
      Tester Display Measurement Item / Range Normal Condition Diagnostic Note
      Interior Lamp Brightness (Up) Room light switch assembly (Up switch) / OFF or ON

      OFF: Room light switch assembly (Up switch) off

      ON: Room light switch assembly (Up switch) on

      		 -
      Interior Lamp Brightness (Down) Room light switch assembly (Down switch) / OFF or ON

      OFF: Room light switch assembly (Down switch) off

      ON: Room light switch assembly (Down switch) on

      		 -
      OK
      Normal conditions listed above are displayed.
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    NG

  2. INSPECT ROOM LIGHT SWITCH ASSEMBLY


    1. Remove the room light switch assembly.

      Click here

    2. Inspect the room light switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ROOM LIGHT SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (ROOM LIGHT SWITCH ASSEMBLY - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] AND BODY GROUND)


    1. Disconnect the G188 room light switch assembly connector.

    2. Disconnect the G216 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
      G188-3 (UP) - G216-26 (ILUP) Always Below 1 Ω
      G188-2 (DOWN) - G216-25 (ILDN) Always Below 1 Ω
      G188-4 (E) - Body ground Always Below 1 Ω
      G188-3 (UP) or G216-26 (ILUP) - Body ground Always 10 kΩ or higher
      G188-2 (DOWN) or G216-25 (ILDN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR