Operation Manual

74 MS 241 C
– Connect M-Tronic test lead to
multimeter
: Insert black plug (1) in the "com"
/ "ground" jack and the red
plug (2) in the "volt" / "ohm" jack
– Set multimeter to "diode test"
: Test diode on
switchgear (3) (microswitch) in
accordance with multimeter
instruction manual
If the switchgear (microswitch) is
intact and the Master Control lever
is set to the } position, the
following target values will be
attained:
– Measurement in direction of flow,
target value: 0.3 volts to 0.7 volts
– Move the Master Control lever to
position F
– Measurement in direction of flow,
required: 1.2 volts to infinity
– Observe display, e.g., (O.L.)
or (1.)
– If the required values are not
attained, replace switchgear and
repeat test procedure, b 8.4
– If the required values are not
attained again, replace wiring
harness; it may be possible to
reuse the previous switchgear,
b 7.7.2
1
2410RA230 TG
2
3
Versions with manual fuel pump
– Install holder with fuel pump,
push new fuel hose onto
connector and press fuel return
line into the guide, b 8.2.3
Versions with heating
– Install holder with heating switch,
press leads in and on and into the
guides, b 8.2.3
– Reassemble remaining parts in
reverse order
8.2.6 Checking the wiring
harness
– Carry out test preparations,
b 8.2.1
– Check contacts and operation,
b 8.2.3
– Set Master Control lever to
position STOP 0
: Lift retaining tab (arrow) and
remove angled plug (1)
– Check angled plug, dismantle
and clean if necessary, b 7.7.2
2410RA166 TG
1
Checking the ground connection
: Measure the resistance between
blade receptacle (1) with black
lead and screw (2) at the control
unit
Target value: < 10 ohms.
: Measure the resistance between
contact spring (1) and screw (2)
at the control unit
Target value: < 10 ohms.
If the target values are not
attained
– Check electrical leads for
interruption, e. g., cable
breakage – if necessary, replace
wiring harness, b 8.2.6
2410RA231 TG
1
2
2410RA232 TG
2
1