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Home >> Toyota >> 2004 >> Matrix Base, FWD, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 948 (Power Seat System) >> Power Seat System >> Diagnosis And Testing >> Diagnosis And Testing - Memory System >> Preliminary Tests
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Preliminary Tests

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.
  1. If any power seat is not operational in any direction, check the power seat circuit breaker, located in the Integrated Power Module. If OK, go to Step 2. Refer to POWER DISTRIBUTION for circuit breaker diagnosis and testing procedure.
  2. Check for proper battery or electrical system voltage. The CS is equipped with a low-voltage cutoff feature. If the electrical system voltage drops below a predetermined set-point (approx. 11.5v), the power seat system will not function until the proper system voltage has been restored. If OK, go to Step 3. Refer to BATTERY SYSTEM and/or GENERATORS & REGULATORS for testing instructions.
  3. Obtain a DRB III(R) scan tool and check for any stored diagnostic trouble codes recorded in the memory (heated) seat adjustable pedal module. Follow the procedures called out in ELECTRONIC CONTROL MODULES to resolve if codes are present.
  4. To check the memory heated seat adjustable pedal module for proper output, obtain a DRB III(R) scan tool, energize each seat track motor axis one at a time. If any axis stops without hitting the end of travel, the potentiometer signal for that axis may have an open, short or be mis-wired. Check the wiring to that axis (module to motor). Fix any wiring problems and retry that axis.
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