198
Primary Voltage - ECM
(500/550/700)
1. Set the meter selector to the DC Voltage position;
then disconnect the two wires from the coil.
2. Connect the red tester lead to the orange wire and the
black tester lead to the blue/white wire.
3. Turn the ignition switch to the ON position. The
meter must show battery voltage.
Primary Voltage - ECM (1000)
NOTE: The ECM is located beneath the rear body
panel near the taillight.
1. Set the meter selector to the DC Voltage position; then
disconnect the orange primary wire from the coil.
2. Connect the red tester lead to the orange primary
wire; then connect the black tester lead to ground.
3. Turn the ignition switch to the ON position.
4. The meter reading must show battery voltage.
EFI Sensors/Components
CRANKSHAFT POSITION (CKP)
SENSOR
To test the CKP sensor, see Stator Coil/Crankshaft Posi-
tion (CKP) Sensor in this section.
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.
MANIFOLD ABSOLUTE PRESSURE
(MAP) SENSOR (1000 Models)
NOTE: Preliminary checks may be performed on
this component using the diagnostic mode on the
LCD gauge (see EFI Diagnostic System in this sec-
tion).
1. Disconnect the MAP connector from the pressure
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/green 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 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/green wire.
With the engine running at idle speed, the meter
should read approximately 1.5 DC volts.
NOTE: If the meter does not read as specified,
replace the sensor.
INLET AIR TEMPERATURE (IAT)
SENSOR (1000 Models)
NOTE: Preliminary checks may be performed on
this component using the diagnostic mode on the
LCD gauge (see EFI Diagnostic System in this sec-
tion).
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. On the sensor when the temperature reaches 20° C
(68° F), the meter should read approximately 2.45k
ohms.
4. On the sensor when the temperature reaches 50° C
(122° F), the meter should read approximately 800
ohms.
5. On the sensor when the temperature reaches 80° C
(176° F), the meter should read approximately 318
ohms.
6. On the sensor when the temperature reaches 110° C
(230° F), the meter should read approximately 142
ohms.
! WARNING
Wear insulated gloves and safety glasses. Heated oil can
cause severe burns.
