The seat cannot move at all or in a certain direction.

The main reasons why the seat can't move completely are: fuse blown, circuit broken, seat switch failure, etc. The main reasons why a certain direction can't act are: the motor corresponding to this direction is damaged, the switch is damaged, and the corresponding line is disconnected.

Power seat diagnosis steps:

If the seat doesn't move at all, you can check whether the fuse and circuit breaker are damaged first; If the fuse and circuit breaker are in good condition, check whether the line and its connector are normal, and finally check the switch.

For the power seat system with storage function, check whether the power circuit and grounding wire of the control unit (ECU) are normal. If you can't move in a certain direction, you can check whether the line is normal first, and then check the switch and motor.

Fault diagnosis and inspection methods

Taking the electric seat circuit of Guangzhou Honda Accord as an example, this paper introduces the inspection methods of its switch, motor and circuit.

1. Check the power seat adjustment switch.

2. Check the electric seat adjustment motor.

Step 3 check the line

A) voltage detection method:

For example, to detect the front-end lifting motor circuit, you can unplug the 2-core plug on the motor and measure the voltage between 1 and 2 terminals with the voltage range of a multimeter. When the switch of the motor is not operated, the voltage value should be zero; When the switch is turned to the "up" position, the voltage between terminals 1 and 2 should be+12V, that is, terminal 1 is positive and terminal 2 is zero; When the switch is turned to the "down" position, the voltage between terminals 1 and 2 should be-12V, that is, terminal 2 is positive and terminal 1 is zero. The detection method of other motor circuits is the same as this.

Resistance detection method:

For example, to detect the upper and lower motor circuits in the front end, you can unplug the 2-core plug on the motor and measure the resistance value of the relevant place with the resistance file of the multimeter.

When the switch of the motor is not operated, the resistance between terminals 1 and 2 should be zero; When the switch is turned to the "up" position, the resistance between the terminal 1 and the positive power supply should be zero, the resistance between the terminal 2 and the ground (negative power supply) should also be zero, and the resistance between the terminal 1 and 2 should be infinite; When the switch is turned to the "Down" position, the resistance between terminal 2 and the positive pole of the power supply should be zero, the resistance between terminal 1 and the ground wire (negative pole of the power supply) should also be zero, and the resistance between terminal 1 and 2 should be infinite. The detection method of other motor circuits is the same as this.