45291/25291 - 45294/25294

DIAGNOSTIC TROUBLE CODES 45291/25291, 45292/25292, 45293/25293, 45294/25294

For Slow Change Of The Potentiometer Value At Memory Setting





Diagnostic Trouble Codes

xx291 Sear front edge pot. for slow at memory setting.

xx292 Legroom adjustment pot. for fore-and-aft operation at memory setting.

xx293 Seat rear edge pot. for slow at memory setting.

xx294 Backrest pot. for slow at memory setting.





Fault Symptom 1

The motor does not run manually.

Feasible fault causes

- Open-circuit in the link between the motor and the electronic control module.

- The motor is faulty.

Diagnostic Procedure

1 Check the voltage supply to the motor.

- Unfasten the motor sensor connector.

- Measure the supply voltage at pin 1 and pin 2 of the sensor connector. Drive the motor in both directions with the manual control.

The voltage between pin 1 and pin 2 should alternate between +12v and -12v (battery voltage) depending on which direction is chosen.

Are both voltage readings correct?

YES Change the motor.

NO Check and rectify possible wiring faults between the motor and the electronic control module. If the cables are without fault, continue with point 2.

2 Final inspection.

- Complete operation check.

Fault Symptom 2





The motor can be driven at regular speed with manual operation, but not at all with memory control.

Feasible fault causes

- Potentiometer fault - the potentiometer fails to alter its setting on the basis that it slides on the motor shaft or there is another mechanical fault.

Diagnostic procedure

1 Checking the potentiometer motor.

- Drive the particular motor manually until the seat has reached its first end position.

Does the motor run manually?

YES Continue with point 2.

NO Refer back to Fault Symptom 1.





2 Checking the potentiometer value.

- Connect the ISAT scan tool.

- Select "READ VALUES"

- Select "SEAT FRONT POT", "LENGTH ADJUSTMENT POT", "SEAT REAR POT" or "BACKREST POT".

- ISAT scan tool displays the potentiometer value.

- Cease the communication and then run the motor until the seat is opposite to the end position.

- Connect the ISAT scan tool and read the values according to the above.

The difference between the potentiometer value should be 100-200 units if the reading is made at the end position of the seat.

Are the differences between the ISAT results certain?

YES Continue with point 3.

NO Change the potentiometer.

3 Final inspection.

- Perform Complete Operation Check. Component Tests and General Diagnostics





Fault Symptom 3

The motor runs abnormally slow at manual operation and not at all with memory recall.

Feasible fault causes

- Mechanical fault causes the seat to jam.

Diagnostic procedure

- Inspect the seat construction.