Movement When Not Permitted
Movement when not permitted
Checking the potentiometer signal
- Ignition off.
Read off the value for potentiometer 1.
Use the control buttons to adjust the seat for legroom, the backrest rake and the seat height adjustment at its front and rear edges.
The value from potentiometer 1 should only change when the seat front edge is adjusted and not when the other functions are used. Legroom adjustment should stop when the button is released.
OK - Intermittent fault
Not OK - Checking connection of wiring
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Checking connection of wiring
- Ignition off.
- Remove the seat from the car according to Lifting the power seat in and out Lifting the Power Seat In and Out.
Check and remedy incorrectly connected wiring to motor 1 and to the potentiometer on motor 1. See Wiring Diagrams 850 for the model year for correct connection information.
When reconnecting:
- Press out the pins in connector C for the cables to be reconnected. Use terminal removal tool 951 2631 Terminal removal tool 951 2631 Terminal Removal Tool.
- Switch the cables and press the pins into the connector.
Were there any problems with connection?
Yes - Verification
No - Checking wiring for short-circuits
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Checking wiring for short-circuits
- Ignition off.
- Disconnect the 14-pin connector C and the 3-pin connector on the potentiometer.
- Check the yellow / red signal cable in the black 14-pin connector terminal C:9, and the two other yellow / red signal cables, C:10 and C:11 for a short-circuit to each other.
Was a fault detected?
Yes - Verification
No - Replacing the component
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Replacing the component
Motors and potentiometers are correctly connected and the cables are not damaged.
Try a new control module according to Control module Control Module.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied as follows:
- Ignition off.
- Reinstall components, reconnect connectors etc.
- Connect seat to car..
Read off value from potentiometer 1.
Use the control buttons to adjust the seat front-rear, the backrest angle and the seat height adjustment at front and rear edges.
The value from potentiometer 1 should only be affected when the seat front edge is adjusted and not when the other functions are affected.
OK - VERIFIED
Not OK - VERIFICATION FAILED
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VERIFIED - FAULT FOUND
VERIFICATION FAILED - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking the potentiometer signal
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Intermittent fault
Movement when not permitted. Intermittent fault
Checking wiring
Check the yellow/red signal lead in the black 14-pin connector, terminal C:9 and the two other yellow/red signal leads, C:10 and C:11, for intermittent short-circuit between the two leads.
Press "Continue" when the fault has been remedied.
Continue - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).
Do you want to view the information again?
Yes - Attempt New Test
No - FAULT FOUND
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Attempt New Test - Checking the potentiometer signal
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