Problem Symptoms Table

WARNING: This page is about a different car, the 2006 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Inspect the fuse and relay before confirming the suspected area in PROBLEM SYMPTOMS TABLE .

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

PROBLEM SYMPTOMS TABLE

Symptom	Suspected Area	Reference
Power seat does not operate (manual or memorized positions).	1. ECU power source circuit	ECU POWER SOURCE CIRCUIT
	2. Replace front power seat switch	OVERHAUL
One function of power seat does not operate (manual or memorized positions).	1. Power seat motor circuit	POWER SEAT MOTOR CIRCUIT
	2. Replace front power seat switch	OVERHAUL
One or all manual seat functions do not operate (memorized positions OK).	1. Replace front power seat switch	OVERHAUL
Memory function does not operate.	1. ECU power source circuit	ECU POWER SOURCE CIRCUIT
	2. Power seat memory switch circuit	POWER SEAT MEMORY SWITCH CIRCUIT
	3. Park/neutral position switch circuit	PARK/NEUTRAL POSITION SWITCH CIRCUIT
	4. Door courtesy light switch circuit	DOOR COURTESY LIGHT SWITCH CIRCUIT
	5. Replace front power seat switch	OVERHAUL
All memory functions do not operate or operate a little then stop (manual functions OK).	1. ECU power source circuit	ECU POWER SOURCE CIRCUIT
	2. Replace front power seat switch	OVERHAUL
One memory function does not operate or operates a little then stops (manual functions OK).	1. Power seat motor ASSY	POWER SEAT MOTOR ASSY
	2. Replace front power seat switch	OVERHAUL
Only lumbar support operation function does not operate (Driver seat only).	1. Power seat switch ASSY (Lumbar support)	INSPECTION
	2. Lumbar support adjuster motor	INSPECTION
	3. Wire harness or connector	-