Operation Manual

73MS 241 C
Measuring resistance
: Measure resistance between
plugs (1) and (2) of the M-Tronic
test lead
Target value: between 28 and
42 ohms
– If the target value is not attained,
check electrical leads for
interruption, e. g., due to cable
breakage between solenoid
valve and diagnostic jack, or
contact due to damaged
insulation
8.2.5 Checking the start
detection function
– Carry out test preparations,
b 8.2.1
– Check screwed and plug
connections, b 8.2.3
2410RA228 TG
1
2
: Set Master Control lever (1) to
position }; the cam on the
lever (2) must actuate the
microswitch (arrow) – clicking
sound
Versions with manual fuel pump
– Push out the holder with the fuel
pump and set it aside, b 8.2.3
Versions with heating
– Disconnect leads, push out the
holder with the heating switch
and set it aside, b 8.2.3
All versions
: Disconnect the plug (1) from the
solenoid valve (2) – the solenoid
valve must not be twisted; if
necessary, hold the solenoid
valve in place when
disconnecting the plug
2410RA222 TG
1
2
2
2410RA229 TG
1
: Lift retaining tab (arrow) and
remove angled plug (1)
– Check angled plug, dismantle
and clean if necessary, b 7.7.2
– Set Master Control lever to
position }
– Connect the test lead, b 8.2.2
2410RA166 TG
1