63TS 500i
7.1 Testing
7.1.1 Checking the screw
connection and plug
There must be a reliable connection
for communication between control
unit, injection valve and sensor. If
communication between control
unit, injection valve and sensor is
interrupted or faulty, the control unit
does not initiate an ignition spark.
– In the event of a malfunction or if
there is no ignition spark, first
check the firm seat of the plugs
on the control unit, then the screw
connection of the ground wire
and the seat of the spark plug
boot, b 7.4
: Unscrew screw (1) and remove
cover (2)
– Screw remains in cover
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The plugs (1, 2, 3, 4, 5) must be
seated completely in the bushings
of the control unit and must be
snapped into place.
– Remove shroud, b 6.4
: Screw (1) must be tight.
The ground wire (arrow) must be
seated completely and firmly in the
cable lug.
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7.1.2 Connect the injection
system diagnostic cable
: Unscrew screw (1) and
remove cover (2)
– Screw remains in cover
– Remove dirt from around the plug
on the control unit before
removing it
: Press lock (arrow) downwards by
hand and push out plug (1)
– Do not pull out the plug (1) by
the wires, do not use tools
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