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Home >> Lexus >> 2003 >> LX 470 >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Driver Door Control System - Diagnosis >> Circuit Inspection >> Power Source Circuit >> Inspection Procedure

Inspection Procedure

  1. Check ECU-IG1 and AM1 fuse. 

    CHECK: 

    Check continuity of ECU-IG1 and AM1 fuse.

    OK: 

    1. Continuity 
    1. NG : Replace faulty fuse. 
    2. OK : GO TO NEXT STEP 
  2. Check voltage between terminals BECU, SIG, BDR and GND of power window master switch connector. 

    PREPARATION: 

    Turn the ignition switch OFF.

    CHECK: 

    Measure the voltage between terminals BECU, SIG, BDR and GND.

    OK: 

    1. Voltage: 10-14V 
    1. OK : Proceed to next circuit inspection shown on problem symptoms table (See  PROBLEM SYMPTOMS TABLE  ). 
    2. No: Go to next step 
  3. Check wire harness and connector between power window master switch and body ground (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
    1. NG : Repair or replace wire harness or connector. 
    2. OK : Proceed to next circuit inspection shown on problem symptoms table (See  PROBLEM SYMPTOMS TABLE  ).