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Home › Lexus › 2003 › LS 430 › Repair and Diagnosis › Body & Frame › Seats › Rear Left Seat Control System - Diagnosis › Circuit Inspection › Power Source Circuit › Inspection Procedure

Inspection Procedure

  1. Check RR SEAT LH and MPX-B1 fuse. 

    CHECK: 

    Check continuity of RR SEAT LH and MPX-B1 fuse.

    OK: 

    Continuity 

    1. NG : Replace the failure fuse. 
    2. OK : Go to next step. 
  2. Check voltage between terminals +B, SYSB and GND of rear LH seat ECU connector. 

    PREPARATION: 

    1. Turn the ignition switch OFF.
    2. Disconnect the rear LH seat ECU connector.

    CHECK: 

    Measure voltage between terminals +B, SYSB and GND.

    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 harness and connector between rear LH seat ECU and body ground (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
    1. OK : Repair or replace harness or connector. 
    2. NG : Proceed to next circuit inspection shown on problem symptom table (See  PROBLEM SYMPTOMS TABLE  ). 
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