Coolant High Temperature Indicator Testing; Temp Light Temperature Sensor Test; Polaris Dragont Ignition Operation - Polaris 2003 Pro X Service Manual

Coolant High Temperature Indicator Testing

Lamp Circuit Test
1. Remove wire from temperature sensing switch located under thermostat housing.
2. With engine idling, ground wire to engine. The temperature warning lamp on the console should light. If not,
replace the lamp assembly or inspect wiring for shorts or open circuit.

Temp Light Temperature Sensor Test

The temperature/warning switch is normally open.
1. Set the multitester on the ohms ( ) scale.
2. Disconnect the lamp wire.
3. Connect one test probe to the switch terminal and the other to engine ground. The meter should show an open
circuit (OL). This indicates a normally open switch. If the switch were heated to approximately 205 F, the
contact in the switch would close and the reading would be less than .4 ohms.
CAUTION:
If attempting to heat the sensor to close the contacts, heat only in a water bath. Never subject the sensor to an
open flame to attempt to close the contacts as sensor damage will result.

Polaris DRAGONt Ignition Operation

Your 2003 Polaris 440 Pro--X snowmobile is equipped with an ignition--system feature which improves competi-
tion performance by increasing exhaust--system temperature. The Dragont ignition system provides maximum
"holeshot" performance for racing applications.
WARNING: Dragon mode in creases the exhaust--system temperature and causes engine misfire and backfire.
Flammable materials and vapors can be ignited resulting in fire and explosion which may cause serious injury,
death, or property damage. Read Owner's Manual. Always follow all instructions and warnings.
Additional information regarding Dragon mode operation:
S
The Dragont ignition system is intended for competition use only.
S There is no benefit to using Dragon mode for normal trail riding.
S
Unnecessary, extended, or excessive use of Dragon mode can result in severe engine damage
which is excluded from Polaris Warranty coverage.
S
Dragont mode usually heats up the exhaust system within 5 to 20 seconds, depending upon
the initial temperature of the exhaust system.
S
Two different sounds may be heard when using Dragont mode. One sound is an erratic misfire
heard when the exhaust system is heating up. The other sound is a consistent misfire (with a
slight rise in engine RPM) when the exhaust system is at target operating temperature.
S
Dragont mode keeps the engine speed to between 4500 and 5100 RPM.
S
Be sure that the clutch engages at 5300 RPM or above to prevent forward creep of the vehicle.
See your dealer if clutch needs to be adjusted.
To use Dragont mode at the start of a race:
1. Warm up the engine and track using the procedure in the Owner's Manual.
2. When staged at the starting line, depress and hold the Dragon (horn) button.
3. Slowly advance the throttle to the wide--open position while keeping the button depressed.
4. Release the button when the start flag drops.
5. The vehicle will launch forward at wide--open throttle.
ELECTRICAL
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