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.
Problem Symptoms Table
HINT:
Inspect the fuse and relay before confirming the suspected area in the table below. Inspect each malfunction circuit in numerical order for the corresponding symptom. If the malfunction still exists even after checking and confirming that all the circuits are normal, replace the ECU.
- FRONT POWER SEAT CONTROL SYSTEM (W/ MEMORY) PROBLEM SYMPTOMS TABLE - POWER SEAT CONTROL SYSTEM
Symptom Suspected Area Power seat does not operate (manual or memorized positions). - ECU power source circuit
- Front power seat switch
One function of power seat does not operate (manual or memorized positions). - Power seat motor circuit
- Front power seat switch
One or all manual seat functions do not operate (memorized positions OK). - Front power seat switch
Memory function does not operate. - ECU power source circuit
- Power seat memory switch circuit
- Park/neutral position switch circuit
- Door courtesy switch circuit
- Front power seat switch
All memory functions do not operate or operate a little then stop (manual functions OK). - ECU power source circuit
- Front power seat switch
One memory function does not operate or operates a little then stops (manual functions OK). - Power seat motor assy
- Front power seat switch
Only lumbar support operation function does not operate (Driver seat only). - Power seat switch assy (Lumbar support)
- Lumbar support adjuster motor
- Wire harness or connector
The power seat control system does not control the storing and restoring of the adjustable pedal and power mirror position (Driver seat only). - Communication circuit
- Front power seat switch
- Outer Mirror Control ECU
- Adjustable pedal ECU
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.