Power Seat Motor: Testing and Inspection
ON-VEHICLE INSPECTION1. CHECK FRONT SEAT ADJUSTER
(SLIDING, FRONT VERTICAL, LIFTER AND RECLINING FUNCTIONS)
a. Check 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 furthest possible position in one direction. When the resistance increases, the current is shut off to prevent a short circuit.
NOTE: Perform steps (1) to (4) to check 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 to the furthest possible position 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 step (1) Measure the time until the electrical current is shut off (motor operation sound will stop).
Standard: 4 to 90 seconds
3. Turn the power seat switch off after the current is shut off, and maintain that condition for approximately 60 seconds.
4. Operate the same switch again and move the seat to the position opposite to the direction in step (1). Check that the motor operates.
5. Repeat steps (1) to (4) for the remaining power seat functions.
2. CHECK LUMBAR SUPPORT ADJUSTER ASSEMBLY LH
a. Inspect PTC operation inside the power seat motor.
NOTE: This inspection should be performed with the seat installed in the vehicle.
1. Move the lumbar support to either the foremost or rearmost position by operating the lumbar support switch, and hold it there for approx. 60 seconds.
2. Try to move the lumbar support past the furthest possible position using the switch and measure the time until the electrical current is shut off (motor operation sound will stop).
Standard: 4 to 90 seconds
3. Turn the lumbar support switch off after the current is shut off, and maintain that condition for approx. 60 seconds.
4. Operate the lumbar support switch to move the lumbar support to the opposite position and check that the motor operates.
3. CHECK FRONT SEAT ADJUSTER (LEG CUSHION ADJUSTER FUNCTION)
a. Inspect PTC operation inside the power seat motor.
NOTE: The inspection should be performed with the seat installed in the vehicle.
1. Move the leg cushion to either the foremost or rearmost position by operating the leg cushion switch, and hold it there for approx. 60 seconds.
2. Try to move the leg cushion past the furthest possible position using the switch and measure the time until the electrical current is shut off (motor operation sound will stop).
Standard: 4 to 90 seconds
3. Turn the leg cushion switch off after the current is shut off, and maintain that condition for approx. 60 seconds.
4. Operate the leg cushion switch to move the leg cushion to the opposite position and check that the motor operates.
INSPECTION
1. INSPECT FRONT SEAT ADJUSTER LH
a. Check slide motor operation.
1. Check that the motor rotates smoothly in the direction indicated when the battery is connected to the slide motor connector terminals.
If the result is not as specified, replace the front seat adjuster LH.
b. Check front vertical motor operation.
1. Check that the motor rotates smoothly in the direction indicated when the battery is connected to the vertical motor connector terminals.
If the result is not as specified, replace the front seat adjuster LH.
c. Check lifter motor operation.
1. Check that the motor rotates smoothly in the direction indicated when the battery is connected to the rear vertical motor connector terminals.
If the result is not as specified, replace the front seat adjuster LH.
d. Check reclining motor operation.
1. Check that the motor rotates smoothly in the direction indicated when the battery is connected to the reclining motor connector terminals.
If the result is not as specified, replace the front seat adjuster LH.
e. Check leg cushion adjuster motor operation.
1. Check that the motor rotates smoothly in the direction indicated when the battery is connected to the reclining motor connector terminals.
If the result is not as specified, replace the front seat adjuster LH.
2. INSPECT FRONT SEAT ADJUSTER RH
a. Check slide motor operation.
1. Check that the motor rotates smoothly in the direction indicated when the battery is connected to the slide motor connector terminals.
If the result is not as specified, replace the front seat adjuster RH.
b. Check reclining motor operation.
1. Check that the motor rotates smoothly in the direction indicated when the battery is connected to the reclining motor connector terminals.
If the result is not as specified, replace the front seat adjuster RH.
3. INSPECT LUMBAR SUPPORT ADJUSTER ASSEMBLY LH (DRIVER SEAT POSITION)
a. Check lumbar support motor operation.
1. Check that the motor rotates smoothly in the direction indicated when the battery is connected to the lumbar support motor connector terminals.
If the result is not as specified, replace the lumbar support adjuster assembly LH.