Test Point 19

Fault, Fault Code 21 Test Point 19

Pot. mirror right horizontal short circuit

Possible causes, elimination, notes
This fault is stored in the following cases:
1. There is a short circuit in the wire to the pot. right rearview mirror.
2. The potentiometer is faulty.
3. The control module is faulty.

Elimination:
1. Replace support with gear unit.
2. 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 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 short circuit on the support plug Pin 5, wire colour yellow, and Pin 7, wire colour pink.

If no short circuit is detected.
- Use an ohmmeter to check for open circuit on the support plug Pin 3 and the mirror plug on the control module Pin 5 Ohmmeter display < 5 Ohms.
- If the fault is still present, replace control module.