Self-Study Program

57
"ON" conditions
The swivelling tow attachment ball head can only be extended or retracted under the following conditions:
– Vehicle must be stationary
– Tailgate must be open
– Button E474 must be operated
– No trailer attached
"OFF" conditions
The swivelling movement may be stopped under the following conditions:
– Anti-pinch protection
– By altering the supply voltage, i.e. if the supply voltage is less than 9 V or more than 15 V, the swivel-out
operation will be stopped
– By changing an "ON" condition
– Attaching a trailer
– Vehicle road speed greater than 6 kph
Initialisation
The electric swivelling tow attachment must be initialised after the following conditions occur:
– Fault memory entry "mechanical fault", "implausible signal" or "electrical fault in electrical circuit"
– After a terminal 30 Reset (e.g. disconnecting the battery) if the tow attachment was not in its end position
– After replacing the electric swivelling tow attachment
– After replacing the trailer detector control unit J345
During the initialisation procedure, the system "learns" the two limit stops or the swivel distance.
The electric swivelling tow attachment ball head must complete a single swivel cycle in at least one direction
without interruption. The initialisation is complete at the most recent after a full swivel-in/swivel-out cycle has
been completed.
To initialise the system, the control button for the relevant direction of movement must be pressed until the
tow attachment ball head reaches the limit stop.
Alternatively, the initialisation can be performed with the diagnostic tester using the Final Control Diagnosis
function.
An initialisation is only possible under the following conditions:
– The trailer detector control unit J345 has not detected an attached trailer
– Vehicle road speed less than 6 kph
– Supply voltage between 9 and 15 V
– Tailgate open