Fault 19 / Fault Code 45

19: Full differential locking button Fault code - 45 -

Possible Causes, Elimination, Remarks

The fault is also recorded if the full locking button (the traction switch on the center console) is held in the "Engage locks" for longer than 10 seconds.

1. Check whether an operating error or a genuine fault has occurred. For this check, enter Menu 3 = Switch inputs with the System Tester.
Desired System Tester display with:
Switch in central position : OPEN
Switch turned to right and held : ON
Switch turned to left and held : OFF

2. If a genuine fault has occurred, pull the plug off the full locking switch.
Checking the full locking switch:

Correct continuity between PIN 1 and PIN 3 when switch is turned to right and held.

Correct continuity between PIN 1 and PIN 5 when switch is turned to left and held.

3. Checking wiring / earth/ground and positive potential:

The current must be positive at PIN 3 of the switch plug when the ignition is switched on (- battery voltage I control unit plug attached). Earth/ground must be present at PIN 5 of the switch plug. Check that there is no break in the wire between control unit plug PIN 28 and PIN 1 of the switch plug.

Make sure that this wire has no short to earth/ground or to the positive side.