Fault code 2567: Diagnosis/troubleshooting

NOTE:

When troubleshooting, the status of the fault must be observed!
Use a suitable test cable (charged with > 5 W) or a trailer, which you know is OK, to check whether the fault is present on the vehicle.

DIAGNOSIS/TROUBLESHOOTING PROCEDURE

Work instruction			Display OK	If not OK
1	Connect test cable (tool) or OK trailer to trailer socket and check whether functions are present or whether the fault is recurring		Fault exists in trailer; repair light, plug connection or wiring → End	Go to Step 2
2	Check fault memory in the trailer hitch control module for [F8] fault		'Short circuit to ground' - Light is not lit Go to Step 3 'Short circuit to B+' - Light is lit continuously Go to Step 4
3	Check wiring in vehicle between trailer hitch control module and trailer socket for a short circuit to ground	Switch off ignition Pull off plug A on trailer hitch control module Check resistance between trailer socket, pin 2, and ground	∞ Ω Go to Step 4	Repair wire or replace wiring harness → End
4	Check wiring in vehicle between trailer hitch control module and trailer socket for a short circuit to B+ (see note)	Push on plug A of trailer hitch control module Switch on ignition Check voltage between trailer socket, pin 2, and ground	< 0.3 V Go to Step 5	Repair wire or replace wiring harness → End
5	Check ground leads	Measure resistance between trailer socket, pin 3, and vehicle ground	< 5 Ω Go to Step 6	Repair wire or replace wiring harness → End
6	Trailer hitch control module		→ End