What Are The Troubleshooting Methods For Power Seat Failure?

- Sep 20, 2018 -

1. Initial inspection of power seat failure

For initial inspection of power seat failures, it is common to check for consumables, wires, and possible parts by performing operations to confirm the failure.

(l) Inspection of consumables First check if the fuses on the instrument panel fuse and the power seat in the fuse box are blown. If it is blown, check the circuit for shorts. After the short-circuit point is removed, the new fuse can be replaced, otherwise the fuse will be blown.

(2) Inspection of wiring Check the connection wiring between the components of the power seat for the presence or absence of a breakage and the presence or absence of insulation damage. After an abnormality is found, it should be processed in time.

(3) Judging the possible causes of the fault by operation By operating the power seat, the possible causes of the fault are judged according to the phenomenon of common faults.

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l) If one seat adjuster reaches the maximum horizontal position or the maximum vertical position before the other seat adjuster, it may be that the two seat adjusters are out of phase and should be properly adjusted.

2) If the power seat cannot move horizontally or vertically, or cannot move in both the horizontal and vertical directions, the seat adjuster motor may be damaged or the control circuit may be faulty.

3) If the vertical movement of the power seat is slow or stuck, the misalignment or excessive dirt between the vertical actuator and the rack may be excessive, and the top plate assembly may be loose.

4) If a seat adjuster cannot move vertically, the vertical drive wire may be disengaged or broken, or the vertical actuator may not work.

5) If the horizontal movement of the power seat is slow or stuck, the misalignment or excessive dirt between the horizontal actuator and the rack may be caused, or the top plate assembly may be loose.

6) If a seat adjuster cannot move horizontally, the horizontal drive wire may be disengaged or broken, or the horizontal actuator may not work.

7) If the power seat is not moving horizontally, it may be a malfunction of the horizontal actuator.

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(4) Inspection of the electric switch Poor contact of the power seat switch may cause the power seat adjustment to be invalid or malfunctioning. l) Use the power seat connectivity diagram on the service manual to check the continuity of the switch. 2) If the switch is damaged, replace the same type of power seat switch.

(5) Inspection of the control circuit If there is an open circuit or a short circuit in the control circuit of the power seat, the current cannot pass through the motor, and the power seat adjustment fails. The fault can be carefully checked and eliminated according to the fault of open circuit or short circuit.

(6) Inspection of the motor The failure of the motor of the power seat, such as brush wear, rotor and stator open circuit, short circuit, etc., can make the motor not work properly.


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