Potentiometer Signal Too High
Potentiometer signal too high
Checking status
- Ignition OFF.
Select scrolling values and read off the value from the potentiometer for motor 1.
Move the seat forward and backward between the seat end positions several times using the control button.
The potentiometer value must not exceed 4.6 V at any time.
OK - Intermittent fault
Not OK - Checking resistance in circuit to potentiometer
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Checking resistance in circuit to potentiometer
- Ignition OFF.
- Remove seat from car according to Replacing seat assembly Replacing Seat Assembly.
- Disconnect black 14-pin connector C.
Connect an ohmmeter between positions C:12 and C:13 on black 14-pin connector (potentiometer side).
The ohmmeter should read approx. 2200 ohms.
OK - Checking the supply and signal leads on the potentiometer
Not OK - Checking potentiometer resistance
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Checking potentiometer resistance
- Ignition OFF.
- Disconnect the black 14-pin connector.
- Remove potentiometer on motor 1.
Connect an ohmmeter between two outer terminals on the potentiometer.
The ohmmeter should read approx. 2200 ohms.
OK - Checking potentiometer's ground
Not OK - Replace component
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Replace component
Test with new potentiometer in accordance with Motors and potentiometers underneath seat, replace Removal and Replacement.
Press "Continue" when the fault has been remedied.
Continue - Verification
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Checking potentiometer's ground
- Ignition OFF.
- Disconnect 3-pin connector to potentiometer on motor 1.
- Disconnect the black 14-pin connector C.
Connect an ohmmeter between the black 14-pin connector terminal C:12 and the corresponding terminal on the 3-pin connector (brown wire).
The ohmmeter should read approx. 0 ohms.
OK - Checking, contact resistance and oxidation
Not OK - Checking for an open-circuit
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Checking for an open-circuit
Check the brown ground lead between the control module, terminal C:12, and the potentiometer for open-circuit in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Press "Continue" when the fault has been remedied.
Continue - Verification
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Checking, contact resistance and oxidation
Check the 3-pin connector to the potentiometer on motor 1 for contact resistance and oxidation and take corrective action in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Press "Continue" when the fault has been remedied.
Continue - Verification
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Checking the supply and signal leads on the potentiometer
- Ignition OFF.
- Disconnect the black 14-pin connector C.
Connect an ohmmeter between supply lead, terminal C:13, and the six supply leads to the motors, terminals C:1-C:6, in the black 14-pin connector on the potentiometer side.
Connect an ohmmeter between signal lead, terminal C:9, and the six supply leads to the motors, terminals C:1-C:6, in the black 14-pin connector on the potentiometer side.
The ohmmeter should read infinite resistance for all readings.
OK - Checking control module and connector C
Not OK - Checking for a short-circuit
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Checking for a short-circuit
The measurements show that the signal lead or supply lead to the potentiometer is short-circuited to battery voltage.
Check the red supply lead between terminal C:13, and the potentiometer on motor 1 for short-circuit to supply in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check the yellow/red supply lead between terminal C:9, and the potentiometer on motor 1 for short-circuit to supply in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Press "Continue" when the fault has been remedied.
Continue - Verification
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Checking control module and connector C
Potentiometer and cables are fault-free
Check and correct the 14-pin black connector C for contact resistance and oxidation in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
If the fault persists after verification, try a new control module in accordance with Control module, replace Control Module.
Press "Continue" when the fault has been remedied.
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, connectors etc.
- Connect up seat in car.
Select scrolling values and read off the value from the potentiometer for motor 1.
Operate the seat forward/backward, running it to the end positions in both directions.
The values indicated for potentiometer 1 must not be more than 4.6 V or less than 0.2 V.
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 status
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Intermittent fault
Potentiometer signal too high. Intermittent fault
Checking wiring and connectors
Check the black 14-pin connector C and potentiometer connector to motor 1 for loose contacts in accordance with Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and contact resistance and oxidation in accordance with Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check the ground lead between control module, terminal C:12 (brown lead), and the potentiometer on motor 1 for intermittent open-circuit in accordance with Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Control the signal and supply leads between the control module and the potentiometer on motor 1, terminal C:9 and C:13, for intermittent short-circuit to supply in accordance with Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
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 status
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