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Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check ECU-IG2 fuse. 

    CHECK: 

    Check continuity of ECU-IG2 fuse.

    OK: 

    1. Continuity 
    1. NG: Replace the defective fuse. 
    2. OK: Go to next step. 
  2. Check voltage between terminal SIG and ES of rain sensor. 

    PREPARATION: 

    Turn ignition switch ON.

    CHECK: 

    Measure voltage between terminals SIG and ES of rain sensor with connector being connected.

    OK: 

    1. Voltage: 10-14V 
    1. OK: Proceed to next circuit inspection shown on problem symptoms table (See  PROBLEM SYMPTOMS TABLE  ). 
    2. NG: Go to next step. 
  3. Check wire harness and connector between rain sensor and body ground (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
    1. NG: Repair or replace wire harness or connector. 
    2. OK: Check and repair wire harness and connector between ECU and battery. 
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