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NEVADA 750
RUN/STOP switch
Function
It tells the control unit if the driver wishes to enable engine start-up or to keep the engine running.
Operation / Operating principle
If the driver wants to shut off the engine or to disable engine start-up, the switch should be open, i.e.
the Marelli control unit should not detect voltage at PIN 26 of the control unit connector.
Level in wiring diagram:Start-up enabling switches.
Location:
Electrical characteristics:
PIN:
red/grey cable (watching the cable harness):
Orange/red cable (cable harness side): always voltage 12 V (with key on)
DIAGNOSIS
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strument panel. If voltage continues to be approximately 5V, restore the pink cable (there is
a short circuit at + 5V). In case there is a short circuit to ground connection of PIN 12 of the
instrument panel connector: Check the earth insulation of the sensor connector pink cable:
if there is a connection, restore the cable harness; if it is earth insulated, check that sensor
resistance is correct: if not OK, replace the sensor; if it is OK, replace the instrument panel
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sensor: right light switch
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connector: near the headstock, right side
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STOP position: the circuit is open
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RUN position: closed circuit (continuity)
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voltage 0 V with engine kill in STOP;
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12 V with engine kill in RUN.
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Engine does not start: disconnect the connector and with switch set to RUN, check if there
is continuity between the two grey/light blue and red/green cables (sensor side): if there is
not continuity, replace the sensor; if there is continuity, check the connector. If it is not OK,
restore cable harness; if it is OK, with key set to ON, check that there is voltage on the
orange/red cable (cable harness side); if there is no voltage, restore cable harness; if there
is voltage, check earth insulation of the red/grey cable (cable harness side). If there is con-
tinuity with ground connection, restore the cable harness; if it is OK, set the key to KEY OFF
and check the control unit connector; if it is OK, replace the Marelli control unit
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Engine does not shut off with switch in "STOP": disconnect the connector and with switch
in STOP, check if there is continuity between the two grey/light blue and red/green cables
(sensor side); if there is continuity, replace the switch; if there is not continuity, it means that,
with KEY ON, the red/grey cable (between switch and main injection relay) and/or the grey/
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Electrical system
ELE SYS - 55
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