Arctic Cat HDX CREW 2017, Service Manual

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104
MANIFOLD ABSOLUTE PRESSURE/
INLET AIR TEMPERATURE (MAP/IAT)
SENSOR
 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 appropriate sensor (MAP sensor is
located on top of the throttle body; IAT sensor is
located on the right side of the air filter housing).
2. Select DC Voltage on the tester and turn the ignition
switch to the ON position.
3. Connect the leads as shown. If the meter does not
read 4.5-5.5 DC volts, check the ECM connector or
wiring.
4. Connect the appropriate sensor to the harness; then
using MaxiClips, connect the leads as shown. With
the engine running at idle speed, the meter should
read approximately 2.0 DC volts (MAP sensor) or
2.9 DC volts (IAT sensor).

NOTE: If the meter does not read as specified,
replace the sensor.
ENGINE COOLANT TEMPERATURE
(ECT) SENSOR

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. Connect the meter leads (selector in OHMS position)
to the sensor terminals.
2. Suspend the sensor and a thermometer in a container
of cooking oil; then heat the oil.

NOTE: Neither the sensor nor the thermometer
should be allowed to touch the bottom of the con-
tainer or inaccurate readings will occur. Use wire
holders to suspend the sensor and thermometer.
3. If the readings are not as indicated, the sensor must
be replaced.
4. Install the sensor and tighten securely; then connect
the leads.
SPEED SENSOR

NOTE: Prior to testing the speed sensor, inspect the
three-wire connector on the speed sensor for contami-
nation, 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 orange wire; then
connect the black tester lead to the black wire.
3. Turn the ignition switch to the ON position.
4. The meter will typically show battery voltage.
5. Leave the black tester lead connected; then connect
the red tester lead to the pink/white wire.
6. Slowly move the vehicle forward or backward; the
meter must show 0 and battery voltage alternately.
To replace a speed sensor, use the following procedure.
1. Disconnect the three-wire connector from the speed
sensor; then remove the cap screw securing the sen-
sor 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 cap screw (threads
coated with blue Loctite #242). Tighten securely.
CD071
Component data can be retrieved using the CATT II. Uti-
lize the Sensor Data screen.
Sensor Wire Color
MAP Black to Pink/Black
Red to Orange/Blue
IAT Black to Pink/Black
Red to Green/Red
Sensor Wire Color
MAP Black to Pink/Black
Red to Brown/White
IAT Black to Pink/Black
Red to Green/Red
Component data can be retrieved using the CATT II. Uti-
lize the Sensor Data screen.
! WARNING
Wear insulated gloves and safety glasses. Heated oil
can cause severe burns.
OIL TEMPERATURE OHMS
-20 °C (-4 °F) 19k
40 °C (105 °F) 1.13k
100 °C (212 °F) 0.15