Arctic Cat XC 450 2016, Service Manual

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83
EFI Sensors/Components
FUEL INJECTOR
Voltage
Remove the connector from the fuel injector. Place the
red meter lead to the orange wire and black meter lead to
ground. With the ignition switch in the on position the
meter must read battery voltage.
Resistance
With the connector still removed from the injector, place
the red meter lead to either terminal; then connect the
black tester lead to the other terminal. Reading is typi-
cally 12 ohms.

NOTE: If voltage is not present, troubleshoot the
battery, connector pins, wiring harness, fuses, or
relay. If resistance is not present or largely out of
specification, replace the injector.
CRANKSHAFT POSITION (CKP)
SENSOR
Resistance
1. Disconnect the gray two-pin connector on the right
side of the engine just above the starter motor.
2. Set the meter selector to the OHMS position.
3. Connect the red tester lead to the green/white wire;
then connect the black tester lead to the blue/yellow
wire. The meter reading must be within specification.
Voltage

NOTE: The battery must be at full charge for this
test.
1. Set the meter selector to the DC Voltage position.
2. Connect the red tester lead to the green/white wire;
then connect the black tester lead to the blue/yellow
wire.
3. Crank the engine over using the electric starter. The
meter reading must be within specification.
OXYGEN (O2) SENSOR
The sensor is located in the exhaust pipe.
1. On the right side of the ATV, unplug the connector.
KC518A
2. On the sensor side of connector, connect the black
(negative) test lead to one white wire pin; then con-
nect the red (positive) test lead to the other white
wire pin.
3. With the meter in the OHMS position, the reading
should be between 6.7-10.1 ohms.

NOTE: If the meter does not read as specified,
replace sensor.
TEMPERATURE/MANIFOLD ABSOLUTE
PRESSURE (TMAP) 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 sensor 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 sensor to the harness; then using Maxi-
Clips, 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.
5. Connect the red tester lead to the green/red wire.
With the engine at idle and at room temperature
(approximately 68° F), the meter should read
approximately 2.9 DC volts.

NOTE: If the meter does not read as specified,
replace the sensor.
ELECTRIC FUEL PUMP/FUEL LEVEL
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).
Component data can be tested using the CATT II. Utilize
the Test screen.
Component data can be retrieved using the CATT II. Uti-
lize the Sensor Data screen.
Component data can be retrieved using the CATT II. Uti-
lize the Sensor Data screen.