Initial Inspection and Diagnostic Overview

SEAT: FRONT POWER SEAT CONTROL SYSTEM: OPERATION CHECK

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 (Driver side only)

* Lumber support (driver side only)

* Leg support (Driver side only)

* Lifter (Driver side only)

* Reclining

2. CHECK FRONT SEAT WITH ADJUSTER FRAME (SLIDING, FRONT VERTICAL, LIFTER AND RECLINING)

(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.

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 LUMBER SUPPORT MOTOR

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

NOTICE:
The inspection should be performed with the seat installed in the vehicle.

(1) Move the lumber support to either the foremost or rearmost position by operation the lumber support switch, and keep it there for approximately 60 seconds.

(2) Try to move the lumber support beyond the maximum position using the switch. Measure the time needed for shutting off the electrical current after the lumber support stops moving (motor operation sound will stop, inspection of current shut-off).

Standard:

4 to 90 seconds

(3) Release the lumber support switch and wait for approximately 60 seconds.

(4) Operate the lumber support switch to move the lumber support to the opposite position and check that the motor operates.

4. CHECK LEG SUPPORT MOTOR

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

NOTICE:
The inspection should be performed with the seat installed in the vehicle.

(1) Move the leg support to either the foremost or rearmost position by operating the leg support switch, and keep it there for approximately 60 seconds.

(2) Try to move the leg support beyond the maximum position using the switch. Measure the time needed for shutting off the electrical current after the leg support stops moving (motor operation sound will stop, inspection of current shut-off).

Standard:

4 to 90 seconds

(3) Release the leg support switch, and wait for approximately 60 seconds.

(4) Operate the leg support switch to move the leg support to the opposite position and check that the motor operates.