1 -18

Fault, Fault code
Possible causes, elimination, notes

Test point 1
Control module faulty
Main relay does not drop out

Fault code 1
This fault is stored in the following cases:
1. The control module is faulty
2. Temporary system error

Elimination:
- Clear fault memory.
- Read out fault memory.
- If the fault does not appear again, check that all system components such as seat adjustment, mirror adjustment, memory function, etc. are functioning correctly.
If the fault appears again, replace the control module.

Test point 2
Control module faulty
Main relay does not pick up

Fault code 2
This fault is stored in the following cases:
1. The control module is faulty
2. Temporary system error

Elimination:
1. Clear fault memory.
2. Read out fault memory.
3. If the fault does not appear again, check that all system components such as seat adjustment, mirror adjustment, memory function, etc. are functioning correctly.
If the fault appears again, replace the control module.

Test point 3
A/D converter faulty

Fault code 3
This fault is stored in the following cases:
1. The control module is faulty
2. Temporary system error.

Elimination:
- Clear fault memory.
- Read out fault memory.
- If the fault does not appear again, check that all system components such as seat adjustment, mirror adjustment, memory function, etc. are functioning correctly.
If the fault appears again, replace the control module.

Test point 4
EEPROM fault
(Checksum)

Fault code 4
This fault is stored in the following case:
The control module is faulty

Elimination:
- Replace the control module.

Test point 5
Required position 1
(Checksum)

Fault code 5
This fault is stored in the following case:
The control module is faulty

Elimination:
- Replace the control module.

Test point 6
Required position 2
(Checksum)

Fault code 6
This fault is stored in the following case:
The control module is faulty

Elimination:
- Replace the control module.

Test point 7
Required position 3
(Checksum)

Fault code 7
This fault is stored in the following case:
The control module is faulty

Elimination:
- Replace the control module.

Test point 8
Hall-effect sensor fore-and-aft adjustment, open circuit

Fault code 8
This fault is stored in the following cases:
1. There is an open circuit in the wire to the Hall-effect sensor fore-and-aft adjustment.
2. The Hall-effect sensor is faulty.
3. The control module is faulty.

Elimination:
- Check plug on control module for contact and damage.
- Check wire to sensor for damage.

Once the cause of the fault has been found and eliminated, actuate the fore-and-aft adjustment switch. The text in the fault memory changes from present to not present if the cause of the fault has really been eliminated.

- If no fault is detected in the wire on the sensor, replace the electric motor for seat adjustment.
- If the fault is still present, replace control module.

Test point 9
Hall-effect sensor fore-and-aft adjustment, short circuit

Fault code 9
This fault is stored in the following cases:
1. There is a short circuit in the wires to the Hall-effect sensor.
2. The Hall-effect sensor is faulty.
3. The control module is faulty.

Elimination:
- Disconnect plug from control module, check for continuity with ohmmeter on Pin 2 and Pin 3.
If a short circuit is found, check the sensor wires first. If no fault is detected in the wire, replace the electric motor for seat adjustment. Once the cause of the fault has been found and eliminated, actuate the fore-and-aft adjustment switch. The text in the fault memory changes from present to not present if the cause of the fault has really been eliminated.
- If the fault is still present, replace control module.

Test point 10
Hall-effect sensor backrest adjustment, open circuit

Fault code 10
This fault is stored in the following cases:
1. There is an open circuit in the wire to the Hall-effect sensor for backrest adjustment.
2. The Hall-effect sensor is faulty.
3. The control module is faulty.

Elimination:
- Check plug on control module for contact and damage.
- Check wire to sensor for damage.
Once the cause of the fault has been found and eliminated, actuate the fore-and-aft adjustment switch. The text in the fault memory changes from present to not present if the cause of the fault has really been eliminated.
- If no fault is detected in the wire, replace the electric motor for seat adjustment.
- If the fault is still present, replace control module.

Test point 11
Hall-effect sensor backrest adjustment, short circuit

Fault code 11
This fault is stored in the following cases:
1. There is a short circuit in the wires to the Hall-effect sensor.
2. The Hall-effect sensor is faulty.
3. The control module is faulty.

Elimination:
- Disconnect plug from control module, check for continuity with ohmmeter on Pin 2 and Pin 3.
- If a short circuit is found, check the sensor wires first.
- If no fault is detected in the wire, replace the electric motor for backrest adjustment.
- Once the cause of the fault has been found and eliminated, actuate the fore-and-aft adjustment switch. The text in the fault memory changes from present to not present if the cause of the fault has really been eliminated.
- If the fault is still present, replace control module.

Test point 12
Hall-effect sensor height adjustment, open circuit

Fault code 12
This fault is stored in the following cases:
1. There is an open circuit in the wire to the Hall-effect sensor fore-and-aft adjustment.
2. The Hall-effect sensor is faulty.
3. The control module is faulty.

Elimination:
- Check plug on control module for contact and damage.
- Check wire to sensor for damage.
- Once the cause of the fault has been found and eliminated, actuate the height adjustment switch. The text in the fault memory changes from present to not present if the cause of the fault has really been eliminated.
- If no fault is detected in the wire on the sensor, replace the electric motor for height adjustment.
- If the fault is still present, replace control module.

Test point 13
Hall-effect sensor front height adjustment, short circuit

Fault code 13
This fault is stored in the following cases:
1. There is a short circuit in the wires to the Hall-effect sensor.
2. The Hall-effect sensor is faulty.
3. The control module is faulty.

Elimination:
- Disconnect plug from control module, check for continuity with ohmmeter on Pin 2 and Pin 3.
If a short circuit is found, check the sensor wires first.
- If no fault is detected in the wire, replace sensor. Once the cause of the fault has been found and eliminated, actuate the fore-and-aft adjustment switch. The text in the fault memory changes from present to not present if the cause of the fault has really been eliminated.
- If the fault is still present, replace control module.

Test point 14
Hall-effect sensor rear height adjustment, open circuit

Fault code 14
This fault is stored in the following cases:
1. There is an open circuit in the wire to the Hall-effect sensor fore-and-aft adjustment.
2. The Hall-effect sensor is faulty.
3. The control module is faulty.

Elimination:
- Check plug on control module for contact and damage.
- Check wire to sensor for damage.
- Once the cause of the fault has been found and eliminated, actuate the height adjustment switch. The text in the fault memory changes from present to not present if the cause of the fault has really been eliminated.
- If the fault is still present, replace control module.

Test point 15
Hall-effect sensor rear height adjustment, short circuit

Fault code 15
This fault is stored in the following cases:
1. There is a short circuit in the wires to the Hall-effect sensor.
2. The Hall-effect sensor is faulty.
3. The control module is faulty.

Elimination:
- Disconnect plug from control module, check for continuity with ohmmeter on Pin 2 and Pin 3.
If a short circuit is found, check the sensor wires first.
- If no fault is detected in the wire, replace the electric motor for height adjustment.
- Once the cause of the fault has been found and eliminated, actuate the height adjustment switch. The text in the fault memory changes from present to not present if the cause of the fault has really been eliminated.
- If the fault is still present, replace control module.

Test point 16
Lumbar pressure sensor open circuit

Fault code 18
This fault is stored in the following cases:
1. There is an open circuit in the wire to the lumbar pressure sensor.
2. The pressure sensor is faulty.
3. The control module is faulty.

Elimination:
- Check plug on control module for contact and damage.
- Check wire to sensor for damage.
- If no fault is detected in the wire, replace lumbar adjustment.
- Once the cause of the fault has been found and eliminated, actuate the lumbar adjustment switch. The text in the fault memory changes from present to not present if the cause of the fault has really been eliminated.
- If the fault is still present, replace control module.

Test point 17
Lumbar pressure sensor short circuit

Fault code 19
This fault is stored in the following cases:
There is a short circuit in the wires to the pressure sensor.
The pressure sensor is faulty.
The control module is faulty.

Elimination:
- Disconnect plug from control module, check for continuity with ohmmeter on Pin 2 and Pin 3, and on Pin 1 and Pin 3. If a short circuit is found, check the sensor wires first.
- If no fault is detected in the wire, replace lumbar adjustment
- Once the cause of the fault has been found and eliminated, actuate the lumbar adjustment switch. The text in the fault memory changes from present to not present if the cause of the fault has really been eliminated.
- If the fault is still present, replace control module.

Test point 18
Pot. mirror right horizontal open circuit

Fault code 20
This fault is stored in the following cases:
1. There is an open circuit in the wire to the pot right rearview mirror.
2. The potentiometer is faulty.
3. The control module is faulty.

Elimination
- Replace support with transmission.
- Actuate switch for memory seat adjustment.

The text in the fault memory changes from present to not present if the cause of the fault has really been eliminated.

- If the fault is no longer present, erase the fault memory.
- If the fault is still present, there is a fault in the wire.

For a fault in the wire, proceed as described below:
- Disconnect mirror plug from the control module.
- Disconnect support with transmission plug.
- Use an ohmmeter to check for open circuit on the support plug Pin 5 and the mirror plug on the control module Pin 11.
Ohmmeter display < 5 Ohm
- Use an ohmmeter to check for open circuit on the support plug Pin 7 and the mirror plug on the control module Pin 4.
Ohmmeter display < 5 Ohm
- Use an ohmmeter to check for continuity on the support plug Pin 3 and Pin 5.
- If no fault is detected in the wire, replace the control module.