LIGHTING SYSTEM ACC Signal Circuit

DESCRIPTION

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

WIRING DIAGRAM

A01ETUFE02

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

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

    5. Read the display on the intelligent tester.

      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
      Normal conditions listed above are displayed.

    NG

    CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BATTERY AND BODY GROUND) Click here

    OK

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

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


    1. Disconnect the 3F*1, 3E*2 and 3B instrument panel junction block assembly connectors.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      3F-1 - Body ground*1 Ignition switch off 11 to 14 V
      3E-1 - Body ground*2 Ignition switch off 11 to 14 V
      3B-23 - 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
      3B-7 - Body ground Always Below 1 Ω

      • *1: for RHD

      • *2: for LHD


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC NO. 1 RELAY)


    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.

      A01EXYQE04
      Text in Illustration
      *a

      Component without harness connected

      (Instrument panel junction block assembly)

      		 *b for RHD
      *c for LHD - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      3F-1 - MB-29 (ACC)*1 Always 10 kΩ or higher
      3F-1 - MB-29 (ACC)*1

      Battery positive (+) → 3B-23

      Battery negative (-) → 3B-7

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

      Battery positive (+) → 3B-23

      Battery negative (-) → 3B-7

      		 Below 1 Ω

      • *1: for RHD

      • *2: for LHD


    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

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