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.

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.
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:
Fig 1: Measuring Voltage Between Terminal IG Of Wiper Control ECU Connector And Body Ground
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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.