LIGHTING SYSTEM ACC Signal Circuit

DESCRIPTION

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

WIRING DIAGRAM

A004KKGE02

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Read the display on the GTS.

      OK
      Normal conditions listed above are displayed.
      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      ACC SW Ignition switch ACC signal/ON or OFF

      ON: Ignition switch ACC

      OFF: Ignition switch off

      		 -

    OK

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

    NG

  2. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BATTERY AND BODY GROUND)


    1. Disconnect the 3A and 3E instrument panel junction block assembly connectors.

    2. A004KI0E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to instrument panel junction block assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      3E-1 - Body ground Always 11 to 14 V
      3A-20 - Body ground Ignition switch ACC 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3A-12 - Body ground Always Below 1 Ω
      3A-13 - Body ground Always Below 1 Ω
      Result
      Result Proceed to
      OK (w/o Entry and Start System) A
      OK (w/ Entry and Start System) B
      NG C

    B

    INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC1 RELAY) Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC1 RELAY)


    1. Remove the instrument panel junction block assembly Click here.

    2. Remove the main body ECU (network gateway ECU) from the instrument panel junction block assembly.

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

      A004K1IE01
      Text in Illustration
      *a

      Component without harness connected

      (Instrument panel junction block assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      3E-1 - MB-9 (ACC) Always 10 kΩ or higher
      3E-1 - MB-9 (ACC)

      Battery positive (+) → 3A-20

      Battery negative (-) → 3A-12 or 3A-13

      		 Below 1 Ω

    OK

    REPLACE MAIN BODY ECU (NETWORK GATEWAY ECU) Click here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC1 RELAY)


    1. Remove the instrument panel junction block assembly Click here.

    2. Remove the main body ECU (network gateway ECU) from the instrument panel junction block assembly.

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

      A004KS6E01
      Text in Illustration
      *a

      Component without harness connected

      (Instrument panel junction block assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      3E-1 - MB-9 (ACC) Always 10 kΩ or higher
      3E-1 - 3B-28 Always 10 kΩ or higher
      3E-1 - MB-9 (ACC)

      Battery positive (+) → 3A-20

      Battery negative (-) → 3A-12 or 3A-13

      		 Below 1 Ω
      3E-1 - 3B-28

      Battery positive (+) → 3A-20

      Battery negative (-) → 3A-12 or 3A-13

      		 Below 1 Ω

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - MAIN BODY ECU (NETWORK GATEWAY ECU))


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3B-28 - D5-22 (ACC) Always Below 1 Ω
      3B-28 - Body ground Always 10 kΩ or higher

    OK

    REPLACE MAIN BODY ECU (NETWORK GATEWAY ECU) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR