Component Inspection

Power Seat Control System

1. INSPECT DRIVER'S POWER SEAT SWITCH CONTINUITY







Slide switch:







Front tilt switch:







Rear lifter switch:







Reclining switch:

If continuity is not as specified, replace the switch.







2. INSPECT POWER SEAT SWITCH CIRCUIT
a. Disconnect the switch connector and connect the seat wire harness to the floor wire harness.
b. Inspect the connector on the wire harness side.
If circuit is not as specified, inspect the circuits connected to other parts.




3. INSPECT SLIDE MOTOR OPERATION
a. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, check that the motor turns clockwise.
b. Reverse the polarity, check that the motor turns counterclockwise.
If operation is not as specified, replace the seat adjuster.

4. INSPECT SLIDE MOTOR PTC THERMISTOR OPERATION




a. Connect the positive (+) lead from the battery to terminal 2, the positive (+) lead from the ammeter to terminal 1 and the negative (-) lead to the battery negative (-) terminal, then move the seat cushion to the rear position.
b. Continue to apply voltage, check that current changes to less than 1 ampere within 4 to 90 seconds.




c. Disconnect the leads from terminals.
d. Approximately 60 seconds later, connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, check that the seat cushion begins to move forwards.
If operation is not as specified, replace the seat adjuster.




5. INSPECT FRONT TILT MOTOR OPERATION
a. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, check that the motor turns clockwise.
b. Reverse the polarity, check that the motor turns counterclockwise.
If operation is not as specified, replace the seat adjuster.

6. INSPECT FRONT TILT MOTOR PTC THERMISTOR OPERATION




a. Connect the positive (+) lead from the battery to terminal 1, the positive (+) lead from the ammeter to terminal 2 and the negative (-) lead to the battery negative (-) terminal, then move the seat cushion to the highest position.
b. Continue to apply voltage, check that the current changes to less than 1 ampere within 4 to 90 seconds.




c. Disconnect the leads from the terminals.
d. Approximately 60 seconds later, connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1, check that the seat cushion begins to descend.
If operation is not as specified, replace the seat adjuster.




7. INSPECT LIFTER MOTOR OPERATION
a. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, check that the motor turns clockwise.
b. Reverse the polarity, check that the motor turns counterclockwise.
If operation is not as specified, replace the seat adjuster.

8. INSPECT LIFTER MOTOR PTC THERMISTOR OPERATION




a. Connect the positive (+) lead from the battery to terminal 1, the positive (+) lead from the ammeter to terminal 2 and the negative (-) lead to the battery negative (-) terminal, then move the seat cushion to the lowest position.
b. Continue to apply voltage, check that the current changes to less than 1 ampere within 4 to 90 seconds.




c. Disconnect the leads from the terminals.
d. Approximately 60 seconds later, connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1, check that the seat cushion begins to ascend.
If operation is not as specified, replace the seat adjuster.




9. INSPECT RECLINING MOTOR OPERATION
a. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, check that the motor turns clockwise.
b. Reverse the polarity, check that the motor turns counterclockwise.
If operation is not as specified, replace the seat adjuster.

10. INSPECT RECLINING MOTOR PTC THERMISTOR OPERATION




a. Connect the positive (+) lead from the battery to terminal 2, the positive (+) lead from the ammeter to terminal 1 and the negative (-) lead to the battery negative (-) terminal, then recline the seat back to the most forward position.
b. Continue to apply voltage, check that the current changes to less than 1 ampere within 4 to 90 seconds.




c. Disconnect the leads from the terminals.
d. Approximately 60 seconds later, connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, check that the seat back begins to fall backward.
If operation is not as specified, replace the seat adjuster.