Front Power Seat Control System (w/o Memory)

SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/o Memory): ON-VEHICLE INSPECTION

1. CHECK POWER SEAT MOTOR

(a) Check the basic functions.





(1) Operate the power seat switches and check that the following seat functions work:

* Sliding

* Front vertical

* Lifter

* Reclining

* Lumbar support

* Leg cushion adjuster (Driver side seat only)

2. CHECK FRONT SEAT ADJUSTER

(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.

NOTICE:
Perform procedure "A" to "D" 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 (Procedure "A").

(2) Operate the power seat switch again and continue to try to move the seat in the same direction as in procedure "A". Measure the time until the electrical current is shut off (motor operation sound will stop) (Procedure "B").

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 (Procedure "C").

(4) Operate the same switch again and move the seat to the position opposite to the direction in procedure "A". Check that the motor operates (Procedure "D").

(5) Repeat procedure "A" to "D" for the remaining power seat functions.

3. CHECK LUMBAR SUPPORT ADJUSTER ASSEMBLY LH

(a) Inspect PTC operation inside the power seat motor.

NOTICE:
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.

4. CHECK FRONT SEAT ADJUSTER

(a) Inspect PTC operation inside the power seat motor.

NOTICE:
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.