Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 738 (FRONT POWER SEAT CONTROL SYSTEM (WITH MEMORY) - DIAGNOSIS)POWER SEAT MOTOR CIRCUITINSPECTION PROCEDURE

2004 Toyota Matrix XR, FWD, Standard

Inspection Procedure

2004 Toyota Matrix XR, FWD, StandardSECTION Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT POWER SEAT MOTOR ASSY
1. Check that the motor rotates smoothly when the battery is connected to the connector terminal.
  
  Fig 1: Inspecting Power Seat Motor Assy P16, P17, P19, P20
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 2: Power Seat Motor Assy. Tester Connection Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPLACE POWER SEAT MOTOR ASSY (See OVERHAUL )
  
  OK: Go to next step.
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU & SWITCH ASSY - POWER SEAT MOTOR ASSY)
1. Disconnect M7 ECU and P16, P17, P19 and P20 motor connectors.
2. Measure the resistance of the wire harness side connectors.
  Standard:
  
  Fig 4: Harness and Connector (Position Control, ECU & Switch Assy. - Power Seat Motor Assy.) Resistance Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
  
  OK: REPLACE POSITION CONTROL ECU & SWITCH ASSY (See OVERHAUL )

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.