LIGHTING SYSTEM(except 5L-E) ACC Signal Circuit

DESCRIPTION

This circuit detects the ignition switch is ACC or off, and sends this information to the main body ECU (multiplex network body ECU).

WIRING DIAGRAM

B001F75E18

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. 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
      ACC SW Ignition switch signal / OFF or ON

      OFF: Ignition switch off

      ON: Ignition switch ACC

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

      B001HTUC01
      *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
      2O-23 - Body ground Ignition switch ACC 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
      2N-1 - 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

      B001HBSC02
      *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-30 (ACC) Battery not connected to 2O-23 and 2N-1 10 kΩ or higher

      Battery positive (+) → 2O-23

      Battery negative (-) → 2N-1

      		 Below 1 Ω
      2N-1 - 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