LIGHTING SYSTEM ACC Signal Circuit

DESCRIPTION

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

WIRING DIAGRAM

A00053OE04

CAUTION / NOTICE / HINT

Note


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

  • If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.

PROCEDURE


  1. CHECK DTC (SMART 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 SMART 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
      ACC SW Power switch on (ACC) signal / ON or OFF

      ON: Power switch on (ACC)

      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 (DC/DC FUSE - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 3E*1 or 3F*2 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
      3E-1 - Body ground*1 Power switch off 11 to 14 V
      3F-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.

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

      A0008B3E02
      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
      3E-1 - MB-29 (ACC)*1 Always 10 kΩ or higher
      3E-1 - MB-29 (ACC)*1

      Auxiliary battery positive (+) → 3B-23

      Auxiliary battery negative (-) → 3B-7

      		 Below 1 Ω
      3F-1 - MB-29 (ACC)*2 Always 10 kΩ or higher
      3F-1 - MB-29 (ACC)*2

      Auxiliary battery positive (+) → 3B-23

      Auxiliary battery negative (-) → 3B-7

      		 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