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


  1. A01MSIBE03

CAUTION / NOTICE / HINT

Note


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

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

PROCEDURE


  1. SYSTEM CHECK

    Result
    Result Proceed to
    w/ Entry Function A
    w/o Entry Function B

    B

    CHECK FOR DTC (PUSH-BUTTON START) Click here

    A

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


    1. Clear the DTCs.

      Click here


      Body Electrical > Entry&Start > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > Entry&Start > Trouble Codes
      Result
      Result Proceed to
      Entry and Start System (for Start Function) DTCs are not output A
      Entry and Start System (for Start Function) DTCs are output B

    B

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

    A

  3. 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 Data List according to the display on the GTS.


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      IG SW Power switch on (IG) signal ON or OFF

      ON: Power switch on (IG)

      OFF: Power switch off

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      IG SW
      OK
      Normal conditions listed above are displayed.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

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


    1. Disconnect the 4E 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
      4E-1 - Body ground Power switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. 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.

      A01MS58C02
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      4E-1 - MB-32 (IG) Auxiliary battery not connected to 4A-40 and 4B-7 10 kΩ or higher
      4E-1 - MB-32 (IG)

      Auxiliary battery positive (+) → 4A-40

      Auxiliary battery negative (-) → 4B-7

      		 Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

  6. CHECK FOR DTC (PUSH-BUTTON START)


    1. Clear the DTCs.

      Click here


      Body Electrical > Entry&Start > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > Entry&Start > Clear DTCs
      Result
      Result Proceed to
      Push-button Start DTCs are not output A
      Push-button Start DTCs are output B

    A

    GO TO STEP 3 Click here

    B

    GO TO PUSH-BUTTON START Click here