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Inspection Procedure

WARNING: This page is about a different car, the 2003 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check WIPER and AM1 fuse. 

    CHECK: 

    Check continuity of AM1 fuse.

    OK: 

    1. Continuity 
    1. NG : Check for short in all the harness and components connected to WIPER and AM1 fuse. 
    2. NG : GO TO NEXT STEP 
  2. Check voltage between terminal WIG of Wiper Control ECU connector and body ground (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 

    PREPARATION: 

    Remove wiper control ECU with connectors being connected.

    CHECK: 

    Measure voltage between terminal IG of wiper control ECU connector and body ground when ignition switch is ON and OFF.

    OK: 

    1. Voltage: 
    VOLTAGE SPECIFICATIONS

    Ignition switch Voltage
    ON 10 - 14 V
    OFF 0 V
    1. OK : Proceed to next circuit inspection shown on problem symptoms table (See  PROBLEM SYMPTOMS TABLE  ). 
    2. NG : Check and repair harness or connector between Wiper Control ECU and battery. 
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