Speed Sensor; Electronic Power Steering (Eps) - Arctic Cat 500 Service Manual

7. If the readings are not as indicated, the sensor must
be replaced.
MANIFOLD ABSOLUTE PRESSURE/
INLET AIR TEMPERATURE (MAP/IAT)
SENSOR (500/550/700)
 NOTE: Preliminary checks may be performed on this
component using the diagnostic mode on the LCD
gauge (see EFI Diagnostic System in this section).
1. Disconnect the MAP/IAT connector from the sensor
located on top of the throttle body.
2. Select DC Voltage on the tester and turn the ignition
switch to the ON position.
3. Connect the black tester lead to the black/pink wire and
the red tester lead to the orange/blue wire. The meter
should read 4.5-5.5 DC volts. If the meter does not
read as specified, check the ECM connector or wiring.
4. Connect the MAP/IAT to the harness; then using
MaxiClips, connect the red tester lead to the
brown/white wire and the black tester lead to the
black/pink wire. With the engine running at idle
speed, the meter should read approximately 2.5 DC
volts (MAP sensor signal).
5. Connect the red tester lead to the green/red wire.
With the engine at idle and at room temperature
(approximately 60° F), the meter should read
approximately 2.9 DC volts.
 NOTE: If the meter does not read as specified,
replace the sensor.

Speed Sensor

 NOTE: Prior to testing the speed sensor, inspect the
three-wire connector on the speed sensor for con-
tamination, broken pins, and/or corrosion.
1. Set the meter selector to the DC Voltage position.
2. With appropriate needle adapters on the meter leads,
connect the red tester lead to the voltage lead (V); then
connect the black tester lead to the ground lead (G).
3. Turn the ignition switch to the ON position.
4. The meter must show 6-12 DC volts.
5. Leave the black tester lead connected; then connect
the red tester lead to the signal lead (S) pin.
6. Slowly move the ATV forward or backward; the
meter must show 0 and 6-12 DC volts alternately.
 NOTE: If the sensor tests are within specifications,
the LCD gauge must be replaced (see Steer-
ing/Frame/Controls).
To replace a speed sensor, use the following procedure.
1. Disconnect the three-wire connector from the speed
sensor harness or from the speed sensor; then remove
the Allen-head cap screw securing the sensor to the
sensor housing.
2. Remove the sensor from the sensor housing account-
ing for an O-ring.
3. Install the new speed sensor into the housing with new
O-ring lightly coated with multi-purpose grease; then
secure the sensor with the Allen-head cap screw (threads
coated with blue Loctite #242). Tighten securely.
Electronic Power
Steering (EPS)
 NOTE: Certain models have been produced with
electronic power steering. The following information
is intended to be used when servicing these models.
The electronic power steering (EPS) system is an elec-
tro-mechanical device that utilizes 12 volt DC power to
drive a motor linked to the steering shaft to assist the
rider when rotating the handlebar. Rider steering inputs
are detected by a torque-sensing transducer assembly
within the EPS housing. These inputs are converted to
electronic signals by the transducer and control circuitry
to tell the motor which way to drive the steering shaft.
When no steering input (pressure on the handlebar) is
detected, no torque signal is generated, and no steering
assist is provided by the motor.
The EPS system is battery-system powered; therefore,
the battery must be in good condition and fully charged.
Power delivery and overload protection are provided by
CD885A
an EPS relay and 30-amp fuse, located under the seat in
the Power Distribution Module (PDM).
CD071
199