Test point 19
Write error, Flash
Value range
Fault code 38
Replace display and operator control unit.
Test Point 20
Test point 20
Video interface
Value range
Fault code 39
Replace display and operator control unit.
Test Point 21
Test point 21
Fault, memory interface
Value range
Fault code 40
Replace display and operator control unit.
Test Point 22
Test point 22
Fault, photo sensor
Control module faulty
Value range
Fault code 41
Replace display and operator control unit.
Test Point 1
Test point 1
Outside sensor on right does not function
Fault code 1
This fault is stored in the following cases:
1. Open circuit in the supply lead to the outside sensor on right.
2. Short to B+ in the supply lead to the outside sensor on right.
3. Short to ground in the supply lead to the outside sensor on right.
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.
Test Point 2
Test point 2
Inside sensor on right does not function