FRONT POWER SEAT CONTROL SYSTEM > PROBLEM SYMPTOMS TABLE

for Preparation Click here


HINT:
  1. Inspect the fuse and relay before confirming the suspected areas in the table below.
  2. Inspect each suspected area in numerical order for the corresponding symptom.
If the malfunction still exists after checking and confirming that all circuits and components are normal, replace the ECU.


1. FRONT POWER SEAT CONTROL SYSTEM (w/o MEMORY) 
Symptom
Suspected area
See page
Power seat does not operate (slide, front vertical, lifter, reclining).
1. P/SEAT fuse
-
2. Power seat switch
 Click here
3. Wire harness or connector
-
Slide operation function only does not operate.
1. Power seat switch
 Click here
2. Front seat frame with adjuster (LH side) (Slide motor)
 Click here
3. Front seat frame with adjuster (RH side) (Slide motor)
 Click here
4. Wire harness or connector
-
Front vertical operation function only does not operate.
1. Power seat switch
 Click here
2. Front seat frame with adjuster (LH side) (Front vertical motor)
 Click here
3. Front seat frame with adjuster (RH side) (Front vertical motor)
 Click here
4. Wire harness or connector
-
Lifter operation function only does not operate.
1. Power seat switch
 Click here
2. Front seat frame with adjuster (LH side) (Lifter motor)
 Click here
3. Front seat frame with adjuster (RH side) (Lifter motor)
 Click here
4. Wire harness or connector
-
Reclining operation function only does not operate.
1. Power seat switch
 Click here
2. Front seat frame with adjuster (LH side) (Reclining motor)
 Click here
3. Front seat frame with adjuster (RH side) (Reclining motor)
 Click here
4. Wire harness or connector
-
Lumbar support operation function only does not operate.
1. Front power seat lumbar switch
 Click here
2. Lumbar support adjuster assembly
 Click here
3. Wire harness or connector
-

2. FRONT POWER SEAT CONTROL SYSTEM (w/ MEMORY) 
Symptom
Suspected area
See page
Power seat does not operate (manual or memorized position).
1. ECU power source circuit
 Click here
2. Position control ECU and switch assembly (power seat control switch and ECU)
 Click here
One of the power seat functions does not operate (manual or memorized position).
1. Power seat motor circuit
 Click here
2. Position control ECU and switch assembly (power seat control switch and ECU)
 Click here
One or all manual seat functions do not operate (memorized positions OK).
1. Position control ECU and switch assembly (power seat control switch and ECU)
 Click here
Memory function does not operate.
1. Memory switch circuit
 Click here
2. Multiplex communication system
 Click here
3. Position control ECU and switch assembly (power seat control switch and ECU)
 Click here
No memory functions operate or all memory functions operate briefly and then stop (manual functions OK).
1. ECU power source circuit
 Click here
2. Position control ECU and switch assembly (power seat control switch and ECU)
 Click here
One memory function does not operate or operates briefly and then stops (manual functions OK).
1. Front seat frame with adjuster (power seat motor)
 Click here
2. Position control ECU and switch assembly (power seat control switch and ECU)
 Click here