Click here

LIGHTING SYSTEM Interior Light Switch Signal Circuit

Click here
Click here Click here
DTC Code DTC Name
  Interior Light Switch Signal Circuit
Click here

DESCRIPTION

The main body ECU detects the condition of the interior light switch.

Click here

WIRING DIAGRAM

Click here

INSPECTION PROCEDURE

Click here

PROCEDURE


  1. Click here

    READ VALUE USING INTELLIGENT TESTER (ROOM LIGHT SWITCH)


    1. Using the intelligent tester, read the Data List (Click here).

      Table 1. Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Lounge Illumination Value SW (UP) Room light switch (up) signal / ON or OFF

      ON: Room light switch (up) on

      OFF: Room light switch (up) off

      		 -
      Lounge Illumination Value SW (Dwn) Room light switch (down) signal / ON or OFF

      ON: Room light switch (down) on

      OFF: Room light switch (down) off

      		 -
      OK
      Switch condition is displayed.

  2. Click here

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

  3. Click here

    INSPECT ROOM LIGHT SWITCH ASSEMBLY


    1. A01DO8DE02

      Remove the room light switch (Click here).

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      3 (UP) - 4 (E) Room light switch up Below 1 Ω
      Room light switch off 10 kΩ or higher
      2 (DOWN) - 4 (E) Room light switch down Below 1 Ω
      Room light switch off 10 kΩ or higher

  4. Click here

    CHECK HARNESS AND CONNECTOR (ROOM LIGHT SWITCH ASSEMBLY - MAIN BODY ECU, DRIVER SIDE JUNCTION BLOCK AND BODY GROUND)


    1. Disconnect the G124 room light switch connector.

    2. Disconnect the 2D driver side junction block connector.

    3. Disconnect the G63 main body ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G124-3 (UP) - G63-5 (ILUP) Always Below 1 Ω
      G124-2 (DOWN) - 2D-13 Always Below 1 Ω
      G124-4 (E) - Body ground Always Below 1 Ω
      G124-3 (UP) or G63-5 (ILUP) - Body ground Always 10 kΩ or higher
      G124-2 (DOWN) or 2D-13 - Body ground Always 10 kΩ or higher

  5. Click here

    CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY


    1. Disconnect the 2D driver side junction block connector.

    2. Remove the main body ECU (Click here).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2D-13 - A-18 (ILDN) Always Below 1 Ω
      2D-13 - Body ground Always 10 kΩ or higher
      Table 2. Text in Illustration
      *a

      Front view of wire harness connector

      (to Driver Side Junction Block Assembly)
      *b

      Front view of wire harness connector

      (to Main Body ECU)

  6. Click here

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

  7. Click here

    REPLACE ROOM LIGHT SWITCH ASSEMBLYClick here

  8. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. Click here

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLYClick here