LIGHTING SYSTEM IG Signal Circuit

DESCRIPTION

This circuit detects the power switch on (IG) or off condition, and sends it to the main body ECU (multiplex network body ECU).

WIRING DIAGRAM

A005DU1E05

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK DTC (ENTRY AND START SYSTEM (for Start Function))


    1. Check for DTCs Click here

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

    GO TO ENTRY AND START SYSTEM (for Start Function) Click here

    A

  2. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Data List.

    5. Read the display on the GTS.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      IG SW Power switch IG signal/ON or OFF

      ON: Power switch on (IG)

      OFF: Power switch off

      		 -
      OK
      Normal conditions listed above are displayed.

    OK

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

    NG

  3. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 2E*1 or 2F*2 instrument panel junction block assembly connectors.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      2E-1 - Body ground*1 Power switch off 11 to 14 V
      2F-1 - Body ground*2 Power switch off 11 to 14 V

      • *1: for LHD

      • *2: for RHD


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. 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 Click here.

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

      A005EGTE02
      Text in Illustration
      *A for LHD *B for RHD
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      2E-1 - MB-32 (IG)*1 Always 10 kΩ or higher
      2E-1 - MB-32 (IG)*1

      Auxiliary battery positive (+) → 2B-25

      Auxiliary battery negative (-) → 2B-6, 2B-4

      		 Below 1 Ω
      2F-1 - MB-32 (IG)*2 Always 10 kΩ or higher
      2F-1 - MB-32 (IG)*2

      Auxiliary battery positive (+) → 2B-25

      Auxiliary battery negative (-) → 2B-6, 2B-4

      		 Below 1 Ω

      • *1: for LHD

      • *2: for RHD


    OK

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

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here