SEAT – FRONT POWER SEAT CONTROL SYSTEMSE–3
SE
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms are
listed in order of probability in the "Suspected Area" column
of the table. Check each symptom by checking the suspected
areas in the order they are listed. Replace parts as
necessary.
Front power seat control system
ON-VEHICLE INSPECTION
1. CHECK POWER SEAT FUNCTION
(a) Check the basic functions.
(1) Operate the power seat switches and check to
make sure each seat function works:
• Sliding
•Front vertical
•Lifter
• Reclining
• Lumbar support
2. CHECK FRONT SEAT FRAME WITH ADJUSTER
(SLIDING, FRONT VERTICAL, LIFTER AND
RECLINING FUNCTIONS)
(a) Check the PTC operation inside the power seat
motor.
HINT:
The PTC thermistor's resistance increases when the
power seat switch is held down even after the power
seat has been moved to the maximum in one
direction. If the resistance increases beyond a
specified level, current is cut to prevent a short
circuit.
Symptom Suspected area See page
All functions do not operate (except lumbar support)1. P/SEAT fuseSE-1
2. Front power seat switchSE-124
3. Wire harness -
Only slide operation function does not operate1. Front power seat switchSE-124
2. Front seat frame with adjuster (slide motor)SE-125
3. Wire harness -
Only front vertical operation function does not operate1. Front power seat switchSE-124
2. Front seat frame with adjuster (front vertical motor)SE-125
3. Wire harness -
Only lifter operation function does not operate1. Front power seat switchSE-124
2. Front seat frame with adjuster (lifter motor)SE-125
3. Wire harness -
Only reclining operation function does not operate1. Front power seat switchSE-124
2. Front seat frame with adjuster (reclining motor)SE-125
3. Wire harness -
Only lumbar support operation function does not
operate1. Front power seat lumbar switchSE-127
2. Lumbar support adjuster (lumbar support motor)SE-127
3. Wire harness -
B131377E01
SE–4SEAT – FRONT POWER SEAT CONTROL SYSTEM
SE
NOTICE:
• The inspection should be performed with the
seat installed in the vehicle.
• Perform the 4 steps below for the full range of
motion for each power seat function.
(1) Choose a power seat function. Operate the
power seat switch and move the seat as much
as possible in one direction. Keep the seat in
that position for approximately 60 seconds.
(2) Operate the power seat switch again and
continue to try to move the seat in the same
direction as in the previous step. Measure the
amount of time elapsed before current is
automatically cut (the sound of the motor has
stopped).
Standard:
4 to 90 seconds
(3) After current has been cut, release the power
seat switch and wait for approximately 60
seconds.
(4) Operate the same power seat switch and move
the seat in the opposite direction. Check that
the motor operates.
3. CHECK LUMBAR SUPPORT ADJUSTER ASSEMBLY
(a) Check the PTC operation inside the power seat
motor.
NOTICE:
The inspection should be performed with the
seat installed in the vehicle.
(1) Operate the lumbar support switch and move
the lumbar support to either the foremost or
rearmost position. Keep the seat in that
position for approximately 60 seconds.
(2) Operate the lumbar support switch again and
continue to try to move the lumbar support in
the same direction as in the previous step.
Measure the amount of time elapsed before
current is automatically cut (the sound of the
motor has stopped).
Standard:
4 to 90 seconds
(3) After current has been cut, release the lumbar
support switch and wait for approximately 60
seconds.
(4) Operate the lumbar support switch and move
the seat in the opposite direction. Check that
the motor operates.
