LIGHTING SYSTEM(for 5L-E) IG Signal Circuit

DESCRIPTION

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

WIRING DIAGRAM

B001F75E15

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. READ VALUE USING GTS


    1. Using the GTS, read the Data List.

      Click here

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

      OFF: Ignition switch off

      ON: Ignition switch ON

      		 "OFF" is also displayed for this item when the ignition switch is ACC.
      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

  2. CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - BATTERY AND BODY GROUND)


    1. Disconnect the driver side junction block assembly connectors.

      B001EVRC01
      *a

      Front view of wire harness connector

      (to Driver Side Junction Block Assembly)

      		 - -

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      2K-1 - Body ground Always 11 to 14 V
      2A-52 - Body ground Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2D-4 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY


    1. Remove the driver side junction block assembly.

      Click here

      B001H7EC01
      *a

      Component without harness connected

      (Driver Side Junction Block Assembly)

      		 - -

    2. Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2K-1 - A-32 (IG) Battery not connected to 2A-52 - 2D-4 10 kΩ or higher

      Battery positive (+) → 2A-52

      Battery negative (-) → 2D-4

      		 Below 1 Ω
      2D-4 - A-11 (GND1) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY Click here