Page 24 Technical Information 40.2010
TI_40_2010_13_01_02.fm
9.2 Ohmmeter and plug connections
An ohmmeter (multimeter) with a diode tester is
required for the following test procedures.
To ensure a reliable contact:
– Use appropriate test probes
– Do not widen or bend plugs and connector tags
– Unplug and plug in plug connections by hand
whenever possible in the direction of the
connector tags – do not insert them on a slant or
tilt or widen them
– Plug must be seated firmly
9.3 Checking screwed and plug connections
A reliable connection must be ensured for
communication between control unit, switching
device and solenoid valve. If communication
between control unit and solenoid valve is
interrupted or faulty, the control unit does not initiate
an ignition spark. Thus if there is no ignition spark,
first check the plug connections and wiring harness
between control device and solenoid.
9.3.1 Checking screwed connections
. Screws (1) tight
. Leads (2) completely and firmly in the cable
lugs (3)
9.3.2 Checking plug connection on solenoid
. Plug (4) must be seated completely and firmly in
the recess of the solenoid
9.4 Connecting the M-Tronic test lead to the
diagnostic jack
. Remove the filter cover
. Remove stopper (1) – diagnostic jack is
accessible
. Connect M-Tronic test lead 5910 840 0903 to
the diagnostic jack
After disconnecting the test lead, reseal the
diagnostic jack with the stopper.
2
2
5903TI007 KN
3
1
3
4
5903TI008 KN
5903TI009 KN
1
5903TI010 KN
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