Cooling Fan - Cannondale 5002401 Service Manual

each injector harness connector. Crank the
engine over. If the light flashes evenly on each
connector, voltage is available at the injectors.
3. If the light fails to flash for either injector, check
the fuel injector wiring circuit for continuity. Con-
sult the vehicle's wiring diagram.
COOLING FAN (ATV
The positive (+) cooling fan terminal is always "hot,"
- even with the ignition switch OFF. This terminal is
connected directly to the positive battery voltage
through the main fuse.
NOTE :
The ECU switches the negative side of the cooling
fan circuit to ground when engine temperature
reaches the ON point. It breaks the ground contact
when the temperature drops to the OFF point. The
ON and OFF points are determined by the ECU
operating code.
Cooling Fan (ECU switching)
ON
85°C
Consult the vehicle wiring diagram for circuit
details.
Static Test - Resistance
1. Disconnect the main harness connector from the
cooling fan coupler.
2. Measure the resistance between the two fan
leads. The resistance should be less than 1 Ohm;
if it is go to the next test.
If it is more than 1 Ohm, replace the fan.
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© 2002 Cannondale Corporation - All Rights Reserved
1. Disconnect the main harness connector from the
OFF
80°C
20
Dynamic Test - Operate
cooling fan coupler.
WARNING
Spinning fan blades can cause the fan to
jump on the workbench possibly resulting
in severe injury.
If the fan is removed from the vehicle radi-
ator, be sure to secure the cooling fan to
the work bench. And, position the fan so
that the blades can spin freely when ener-
gized. Keep your hand clear of the blades
and wear eye protection.
2. Connect a 12 V (+) battery voltage source to
the red fan lead. Connect the 12V (-) lead to
the black fan lead. If the fan runs, it is OK.
Check to make sure the airflow is correct;
there is a flow direction indicator on the fan
housing. Airflow should be drawn through
the radiator from the front of the vehicle to the
back. Go to the next step.
If the fan does not operate normally (e.g.,
stops and starts, or spins slowly or not at all),
replace the fan.
3. Set the multi meter to VDC or Vdc (20 volt
range).
Connect the positive meter probe to harness
coupler CN22 pin A.
Connect the negative meter probe to ground.
Battery voltage should be present.
If battery voltage is not present, check the
main fuse or connections to the battery. If the
main fuse and battery connections are OK,
Check for an open or short circuit in the
cooling fan circuit. Consult the vehicle wiring
diagram. Take corrective action.
If the fan circuit is OK, check the coolant
sensor.
If the coolant sensor is OK, replace the ECU.