45
Workshop notes
10
Workshop notes
10 .1
Maintenance information
TailGUARD is maintenance-free. In the case of system fault messages or an
assumed malfunction, the ultrasonic sensors must be checked for soiling first
and cleaned as required.
In the case of a TailGUARD fault message or failure of the indication for
operational readiness to appear (
Chapter "9 Operation", page 39) after
longer periods of being stationary with the ignition turned on, the vehicle must
be driven ahead a short distance until TailGUARD
detects the speed signal. The
next time the reverse gear is engaged, TailGUARD
is ready for operation again.
A system diagnostics must be carried out as the next step. Apart from reading
out the diagnostic memory, this function can also be used to activate individual
TailGUARD components directly to test their function.
10 .2
Diagnosis
Carry out a system diagnostics if you notice anything conspicuous or warning
lamps / indicators are lit.
Currently present as well as sporadically occurring faults are stored in the
diagnostic memory and can be displayed by means of the TEBS E Diagnostic
Software. Repair instructions are provided in the diagnostic software.
After faults have been eliminated, the diagnostic memory should always be
cleared.
10 .3
Repair and replacement
Defective cables and devices must be replaced with original WABCO products
of identical part number.
If ultrasonic sensors or the control unit are replaced, a start-up procedure via
system diagnostics must be carried out again.
When replacing the electronic control unit, the existing parameter set should be
extracted, if possible, and copied to the new control unit.
The cover needs to be removed to replace the electronic control units.
– Use a screwdriver with a minimum length of 11 cm to release the catch on
the housing to remove the cover – as illustrated in the figure below.
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