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Home >> Lexus >> 2005 >> IS 300 Base, Standard >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Body Control System - Diagnostics >> Circuit Inspection >> Ignition Switch Power Source Circuit >> Inspection Procedure
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Inspection Procedure

  1. Check ECU-IG and RADIO No. 2 fuse. 

    CHECK: 

    Check continuity of ECU-IG and RADIO No. 2 fuse.

    OK: 

    1. Continuity 

    NG: Replace the failure fuse. 

    OK: Go to next step 

  2. Check voltage between terminals ACC, IG and GND of Body ECU connector. 

    PREPARATION: 

    Turn ignition switch ON.

    CHECK: 

    Measure voltage between terminals ACC, IG and GND.

    OK: 

    1. Voltage: 10-14V 

    OK: Proceed to next circuit inspection shown on problem symptoms table. (See  PROBLEM SYMPTOMS TABLE  ) 

    NG: Go to next step 

  3. Check wire harness and connector between Body ECU and body ground. 

    NG: Repair or replace wire harness or connector. 

    OK: Check and repair wire harness and connector between Body ECU and battery.