Movement When Not Permitted

J A. Diagnostic trouble code (DTC) information





Condition
Motor 2 controls the backrest angle. If the control module receives a signal from the potentiometer that motor 2 is operating even though the control button for seat backrest angle is not being activated then diagnostic trouble code (DTC) PSL/PSR-131 is set.

Possible source
- Defective control module.

Fault symptom(s)
- The seat backrest moves a short moment before automatic shutdown occurs.
- Fault-tracing begins at JB. Movement when not permitted.





J B. Movement when not permitted

JB1: Checking potentiometer signal
- Ignition OFF.
Select scrolling values and read off the value from potentiometer 2.

Use the control button and adjust backrest angle.

The value for potentiometer 2 should only be affected when the backrest is adjusted.The backrest should stop when the button is released.

If reading is OK:
- JB5

If reading is incorrect:
- JB2





JB2: Replace component
Try a new control module. Control module, Service and Repair

Then continue with:
- JB3





JB3: Verification
Hint: After carrying out the repair, check that the fault has been remedied as follows:
- Ignition OFF.
- Reinstall components, connectors etc.
- Connect up seat in car.
Select scrolling values and read off the value from potentiometer 2.

Use the control button and adjust backrest angle.

The value for potentiometer 2 should only be affected when the backrest is adjusted.

If reading is OK:
- Fault corrected

If reading is incorrect:
- JB4

JB4: Fault-tracing information
The verification result shows that the fault persists.
Do you want to exit fault-tracing?

Yes:
- Fault not corrected

No:
- JB1

JB5: Intermittent fault
The fault is probably due to a relay in the control module temporarily sticking in the closed position and then opening correctly. If the fault persists after verification, try a new control module. Control module, Service and Repair

Then continue with:
- JB6

JB6: Fault-tracing information
For intermittent faults fault-tracing is not followed by a verification because the fault is not present at this moment.
Do you want to repeat fault-tracing?

Yes:
- JB1

No:
- Operation done