Symptom
The customer complains about knocking, jerking or vibrations in the vehicle during acceleration. This can occur while driving both at partial load and full load.
Cause
This may be caused by a faulty fuel injector, which can result in misfiring. No fault codes are stored in the fault memory of the (DME) control unit in this case.
Remedial Action
Before replacing a transfer box, a test drive should therefore be performed to rule out the possibility that the drive train knocking is being caused by an injector. The following diagnostic drive must be performed for this purpose.
