LIGHTING SYSTEM ACC Signal Circuit

DTC Code DTC Name
ACC Signal Circuit

DESCRIPTION

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

WIRING DIAGRAM

E232514E05

CAUTION / NOTICE / HINT

Note:

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

  • When replacing the main body ECU (multiplex network body ECU), make sure to replace it with a new one.

PROCEDURE

  1. READ VALUE USING GTS (ACC SW)

    1. Using the GTS, read the Data List.

      Click hereClick here

      Body Electrical > Main Body > Data List

      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

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

      Body Electrical > Main Body > Data List

      Tester Display

      ACC SW

      OK

      The display is as specified in the normal condition column.

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick hereClick here

    NG

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

    1. E270693C01

      *a

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)

      Disconnect the 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

      3A-1 - Body ground

      Always

      11 to 14 V

      3C-45 - 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

      3D-9 - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC RELAY)

    1. E241347C02

      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      Remove the instrument panel junction block assembly connectors.

      for LHD:

      Click here

      for RHD:

      Click here

    2. Reconnect the 3A, 3C and 3D instrument panel junction block assembly connectors.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      A-29 (ACC) - Body ground

      Ignition switch ACC

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    for LHD:

    Click here

    for RHD:

    Click here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    for LHD:

    Click here

    for RHD:

    Click here