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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 ECU-IG1 fuse. 
    1. NG : Check for short in all the harness and components connected to ECU-IG1 fuse, and repair them. 
    2. OK : GO TO NEXT STEP 
  2. Check voltage between terminal IG of Power Seat Control ECU connector and body ground. 

    PREPARATION: 

    Remove Power Seat Control ECU with connectors being connected.

    CHECK: 

    Measure voltage between terminal IG of Power Seat Control ECU connector and body ground when ignition switch is ON and OFF.

    OK: 

    IGNITION SWITCH VOLTAGE

    Ignition switch Voltage
    ON 10 - 14 V
    OFF 0 V
    Fig 1: Identifying Power Seat Control ECU Connector Terminal IG
    G03374924Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK : Proceed to next circuit inspection shown on problem symptom table (See  PROBLEM SYMPTOMS TABLE  ). 
    2. NG : Check and repair harness or connector between Power Seat Control ECU and battery. 
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