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Home › Lexus › 2001 › LS 430 › Repair and Diagnosis › External Pages › Different car › Section 237 (Rain Sensor System - Diagnosis) › Circuit Inspection › Power Source Circuit › Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2002 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check P-IG fuse. 
    1. CHECK:  Check continuity of P-IG fuse.
      1. OK:  Continuity
    1. NG:  Replace the failure fuse.
    2. OK:  Go to next step.
  2. Check voltage between terminal SIG and ES of rain sensor. 
    1. PREPARATION: 
      1. Turn ignition switch ON.
      2. Disconnect the rain sensor connector.
    2. CHECK:  Measure voltage between terminals SIG and ES of rain sensor.
      1. OK:  Voltage: 10-14 V
    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. 
    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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