Test Point 4

Test point 4
Outside sensor on left does not function

Fault code 4
This fault is stored in the following cases:
1. Open circuit in the supply lead to the outside sensor on left.
2. Short to B+ in the supply lead to the outside sensor on left.
3. Short to ground in the supply lead to the outside sensor on left.

Elimination:
Delete fault memory, disengage reverse gear and switch off ignition. Then switch on ignition, engage reverse gear again and read out fault memory.

If the fault reappears, check plug on sensor for open circuit.

If there is no open circuit, check for continuity with an ohmmeter from sensor connector pin 1 to pin 4 and pin 1 to pin 2. Continuity should not be measured.

If no short circuit can be detected, replace sensor.