Test Point 25

TEST POINT 25
Potentiometer mirror Left Vertical Short Circuit

Fault Code 27
This fault is stored in the following cases:
1. There is a short circuit in the wire to the potentiometer left rearview mirror.
2. The potentiometer is faulty.
3. The control module is faulty.

Fault Effect: No automatic adjustment possible

Elimination:

- Replace support with gear unit.

- Actuate switch tor 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 plug at support with gear unit.

- Disconnect mirror plug from the control module.

- Use an ohmmeter to check for continuity on the support plug Pin 5 and Pin 7.

- Use an ohmmeter to check for open circuit on the support plug Pin 3 and the mirror plug on the control module Pin 5

Display: < 5 ohms

- If no fault is detected in the wire but the fault is still present, replace the control module.