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Home >> Toyota >> 2004 >> Matrix Base, FWD, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 941 (Heated Seat System) >> Heated Seat Module - Front Seats >> Diagnosis And Testing - Heated Seat Module - Front Seats >> Preliminary Test

Preliminary Test

WARNING: This page is about a different car, the 2004 Chrysler Pacifica. However, it is still accessible from the selected car via links, so may be relevant.

Before testing the individual components in the suspect system, check the following:

  1. Using the DRB III® scan tool, check the memory heated seat adjustable pedal module (MHSAPM) for any stored fault codes. Record these codes on paper for reference and resolve using BODY DIAGNOSTIC PROCEDURES - PACIFICA .
  2. Check the vehicles battery open-circuit voltage and charging system performance. If the vehicles electrical system is defective or weak it may not be suppling sufficient voltage to operate the system in question.
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