Last Modified: 11-29-2007 1.6 D
Service Category: Vehicle Interior Section: Seat
Model Year: 2008 Model: Sequoia Doc ID: RM000002Y3J002X
Title: SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): OPERATION CHECK (2008 Sequoia)

OPERATION CHECK

1. CHECK FRONT POWER SEAT FUNCTION



(a) Check the basic functions.

(1) Operate the power seat switches and check to make sure that each seat function works:

  • Sliding
  • Reclining
  • Front vertical (for Driver Seat)
  • Lifter (for Driver Seat)
  • Lumbar support
  • Leg support (for Driver Seat)

2. CHECK POWER SEAT MOTOR ASSEMBLY (SLIDING, FRONT VERTICAL, LIFTER, RECLINING, LUMBAR SUPPORT AND LEG SUPPORT)

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

HINT:

The resistance of the PTC thermistor increases when the power seat switch is held down even after the seat has been moved to the farthest possible position in one direction. If the resistance increases beyond a specified level, the current is shut off to prevent a short circuit.

NOTICE:

  • The inspection should be performed with the seat installed in the vehicle.
  • Perform the 4 steps below 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 farthest 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 the previous step. Measure the time until the current is shut off (motor operation sound will stop).

Standard:

4 to 90 seconds

(3) After the current is shut off, 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 MEMORY AND SEAT RESTORING OPERATION

(a) Turn the ignition switch to ON and move the shift lever to P.

(b) Move the seat to the maximum front and upper positions via the seat switch.

(c) Check that the buzzer sounds for 0.5 seconds and the seat position is memorized when the M1 switch and SET switch are pressed and held.

(d) Move the seat out of the maximum front and upper positions via the seat switch.

(e) Check that the buzzer sounds for 0.5 seconds and the seat position is memorized when the M2 switch and SET switch are pressed and held.

(f) Check that the buzzer sounds for 0.1 seconds and the seat automatically moves into the maximum front and upper positions (memorized positions) when the M1 switch of the memory switch is pressed.

(g) Check that the buzzer sounds for 0.1 seconds and the seat automatically moves out of the maximum front and upper positions (memorized positions) when the M2 switch of the memory switch is pressed.

(h) After turning the ignition switch to ON and moving the shift lever to P, check that the buzzer sounds for 0.1 seconds and the seat automatically moves into the memorized position when the M1 or M2 switch is pressed.

(i) After the ignition switch is turned off and the driver side door is opened, check that the buzzer sounds for 0.1 seconds and the seat automatically moves into the memorized position when the M1 or M2 switch is pressed within 30 seconds.

(j) After turning the ignition switch to ON and moving the shift lever to P, check that the buzzer sounds for 0.1 seconds and the seat automatically moves into the memorized position when the M1 or M2 switch is pressed.

(k) Check that the following procedures erase the recorded seat positions of switches M1 and M2: fully slide the seat forward or rearward; hold M1 or M2; disconnect the cable from the negative (-) battery terminal; and wait for 3 minutes.