45231/25231 - 45234/25234

DIAGNOSTIC TROUBLE CODES 45231/25231, 45232/25232, 45233/25233, 45234/25234

Potentiometer Failure





Diagnostic Trouble Codes

xx231 Seat front edge pot. break/short ground.

xx232 Length adjustment pot. break/short ground.

xx233 Seat rear edge pot. break/short ground.

xx234 Backrest pot. break/short ground.

For low voltage from the potentiometer.

Fault Symptom

- It will not remember any new seat settings.

- One or more motors do not run to the memory setting.

- The backrest will not operate manually (only valid for faulty backrest potentiometer).

Feasible Fault Causes

- The link is broken between the electronic control module and pin 1 of the potentiometer.

- Short-circuit between cables connected to: pin 1 and 2 of the potentiometer, pin 2 and 3 of the potentiometer.

- The potentiometer is faulty.

Diagnostic Procedures





Important: If a potentiometer has slipped its setting it must be re-calibrated before the seat is used. Calibration is achieved by running the motor in question to both end positions.

1 Testing the ground and voltage supply readings to the potentiometers.

- Unfasten the potentiometer sensor connector.

- Ignition timing the ON position.

- Carry out voltage measurement at the sensor connector:

Pin 1 to B-, voltage should be 5v.

B+ to pin 3, the voltage should be 12v.

Are both voltage readings correct?

YES Continue with point 2.

NO Check and rectify the relevant cable (and connectors)





2 Testing of the electronic control module-inlet.

- Connect the ISAT scan tool.

- Select "READ VALUES"

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

- ISAT should display 5v for the relevant selection.

- Loop pin 2 and pin 3 of the potentiometer connections in question.

- ISAT should display approx. 0v.

Are the ISAT results correct?

YES Change the relevant potentiometer.

NO Check and possibly rectify the cable between the potentiometer sensor connector, pin 2 and the electronic control module. If the cables are without fault, continue with point 3.

3 Final inspection.

- Perform Complete Operation Check. Component Tests and General Diagnostics