TROUBLESHOOTING 22
229
Faults Possible cause Action
High oil consumption Engine oil too thin (low viscos-
ity)
– Change the engine oil and the oil filter,
clean the oil screens. ( p. 213)
Headlight and position light are
not functioning
Fuse 6 blown – Change the fuses of individual power
consumers. ( p. 180)
Turn signal, brake light, and
horn are not functional
Fuse 6 blown – Change the fuses of individual power
consumers. ( p. 180)
Time is not (correctly) dis-
played
Fuse 7 is blown – Change the fuses of individual power
consumers. ( p. 180)
– Set the clock. ( p. 80)
12 V battery discharged Ignition was not switched off
when vehicle was parked
– Charge the 12-V battery. ( p. 174)
The 12-V battery is not being
charged by the alternator
– Check the charging voltage.
– Check the open-circuit current.
The combination instrument
shows nothing on the display
Fuse 7 is blown – Change the fuses of individual power
consumers. ( p. 180)
– Set the clock. ( p. 80)
Speedometer in combination
instrument not functioning
Speedometer wiring harness is
damaged or plug-in connector
is oxidized
– Check the wiring harness and plug-in
connector.
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