Test Point 3

Fault, Fault Code 22 Test Point 3

Data lead, PCM-navigation unit Short to ground Short to B+

Possible causes, elimination, notes

Short to ground
1. Pull off plug II on the display and operator control unit.
2. Pull off plug on the navigation unit.
3. Check lead from navigation unit plug pin 5 to plug II pin 4 for short to ground.

Short to B+
1. Pull off plug II on the display and operator control unit.
2. Pull off plug on the navigation unit.
3. Check lead from navigation unit plug pin 5 to plug II pin 4 for short to B+.