Ohmmeter display <5 Ohms
- 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 Ohms
- 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.
Test Point 25
Test point 25
Pot. 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 pot. left rearview mirror.
2. The potentiometer is faulty.
3. The control module is faulty.
Elimination:
- Replace support with gear unit.
- 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 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
Ohmmeter display <5 Ohms
- If no fault is detected in the wire but the fault is still present, replace the control module.
Test Point 26
Fault code 32
This fault is stored in the following case:
- Switch for memory seat adjustment (1, 2, or 3), or switch for seat adjustment (e.g. Fore-and-aft adjustment forward) is continuously switched.
Elimination:
- Erase fault memory and read it out again after a waiting time of 60 seconds.
Proceed as described below if the fault is still present:
- Select menu item Input signals.
The following button positions can be read out in the menu item Input signals.
- Button M
- Button 1
- Button 2
- Button 3
- Fore-and-aft adjustment forward
- Fore-and-aft adjustment backward
- Backrest forward
- Backrest backward
- Front height upward
- Front height downward
- Rear height upward
- Rear height downward