LIGHTING SYSTEM IG Signal Circuit

DTC Code DTC Name
IG Signal Circuit

DESCRIPTION

This circuit detects the engine switch state [on (IG) or off] and sends it to the main body ECU.

WIRING DIAGRAM

E199769E21

CAUTION / NOTICE / HINT

Note:

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

PROCEDURE

  1. READ VALUE USING INTELLIGENT TESTER (ENGINE SWITCH)

    1. Using the intelligent tester, read the Data List.

      Click hereClick here

      Body Electrical > Main Body > Data List

      Tester Display

      IG SW

      Body Electrical > Main Body > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      IG SW

      Engine switch on (IG) signal

      ON or OFF

      ON: Engine switch on (IG)

      OFF: Engine switch off

      -

      OK

      The display is as specified in the normal condition column.

      Result

      Result

      OK

      NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick here

    NG

  2. CHECK HARNESS AND CONNECTOR (BATTERY - MAIN BODY ECU)

    1. E200976C04

      *a

      Front view of wire harness connector

      (to Main Body ECU)

      Remove the main body ECU.

      Click here

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      A-32 (IG) - Body ground

      Engine switch on (IG)

      11 to 14 V

      Result

      Result

      OK

      NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Click here

    NG

    REPLACE HARNESS AND CONNECTOR