Arctic Cat Wildcat EFI 1994 Service Manual page 56

Testing Resistance
1. Place the multimeter selector in the ohms posi ­
tion. Test between the red and black leads in
the throttle sensor connector. Test specification
is 5000 ohms
±
15 percent.
2. Test between the throttle sensor's black and
white leads, with the throttle in the idle position.
Test specification is 850 ohms
±
15 percent.
3.
Place the throttle in the wide-open-throttle
position. Test between the white and black
leads. Test specification is 5000 ohms
±
15
per­
cent.
4. Attach the multimeter to the throttle sensor
black and white leads; then compress
and
release the throttle lever. The resistance should
change as the throttle lever is compressed and
released. If the resistance does not change, the
sensor is not operating correctly.
• NOTE: See page 79 for replacement.
Testing Throttle Valve Sensor Line Voltage
NOTE: Before testing any EFI component
check the connection to ensure it is clean
and tight.
1. Turn the ignition switch to the OFF position.
Install the test harness
(pin
0644-181) by dis­
connecting the main harness from the ECU and
inserting the test harness connectors into the
ECU. Insert the main harness connectors into
the large black connector of the test harness.
2. Turn the ignition switch ON.
3. Using the multi meter set on the DC voltage
scale, test the throttle valve main line voltage
between pins 1 and 17. Voltage must measure
between 5.22 volts maximum and 5.02 volts
minimum.
Fig. 3-32
4. If no voltage is found, check the following com­
ponents:
A. Battery Voltage - must measure 12.6-12.8
volts. Charge battery if low.
B. Check to ensure all switches are ON and
that the throttle monitor low speed switch is
activated. The battery light on the console
should be ON at this time.
C. Check the brown fuse link wire for voltage at
its output end.
Battery voltage must be indi­
cated. Jf
not repJace
the .!;>,rowa
/'&'6'6 ((mt
D. Check the brown EFI relay.
5. If low voltage is indicated, disconnect the throt ­
tle sensor from the main harness. If the voltage
now reads within specifications, the throttle
sensor is faulty and must be replaced.
Testing Voltage
1. Turn the ignition switch OFF.
2. Disconnect the main harness from the ECU and
install the EFt test harness.
3. Turn the ignition switch ON.
4. Using a multimeter set on the DC scale, test
between pins 3 and 17.
5. With the throttle in the full-closed position, volt ­
age must measure between 0.77 volts minimum
and 0.87 volts maximum.
NOTE: The throttle shaft must be in the
full-closed position for the above test. If
the throttle cable is not allowing the throttle
shaft to fully close, the reading will measure too
high.
6. Compress the throttle lever to the wide-open ­
throttle position. Measure the voltage between
pins 3 and 17. Voltage must measure between
3.8 volts minimum and 4.2 volts maximum.
NOTE: The throttle cable must pull the
throttle lever to the full-open position for
an accurate test. If your reading is low, pull on
the throttle cable with your free hand to make
sure the throttle is in the full-open position. If
your reading is now within specifications,
adjust the throttle cable.
7. If the voltage tests are not within specifications
at the closed position, adjust or' replace the
throttle valve sensor.
0729-602
55