LIGHTING SYSTEM IG Signal Circuit

DESCRIPTION

The main body ECU receives an ignition switch signal used to control the exterior light control system for automatic light control*1, light auto turn off control and daytime running light control*2.


WIRING DIAGRAM

A01IO73E01

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. Using the intelligent tester, read the Data List Click here.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      IG SW Ignition switch ON signal / ON or OFF

      ON: Ignition switch ON

      OFF: Ignition switch off

      		 -
      OK
      The display is as specified in the normal condition column.

    NG

    CHECK HARNESS AND CONNECTOR (IG POWER SOURCE CIRCUIT) Click here

    OK

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

  2. CHECK HARNESS AND CONNECTOR (IG POWER SOURCE CIRCUIT)


    1. A01IPGDE04
      Text in Illustration
      *1 Main Body ECU (Instrument Panel Junction Block Assembly)
      *2 ECU-IG NO. 1 Fuse

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      ECU-IG NO. 1 fuse terminal - Body ground Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)