Tps (Throttle Position Sensor); Replacement Procedure - Arctic Cat Wildcat EFI 1994 Service Manual

AR201
NOTE: If the barometric sensor has failed,
the ECU will automatically go to the baro­
metric pressure shown below for each model. If
these readings appear, replace the ECU.
Model Barometric
Pre;~~;& I
' J - - - - - - - - - - - - - - - - - I - - - - - - - - - - - - - ­
1994 700 EFI 880 mmHg
(34.~~.':l:...D~
Hg)
I
TPS
(Throttle Position Sensor)
Replacement Procedure
To replace the Throttle Position Sensor on the 1994
700 EFI models, follow the procedure below.
In order to complete the procedure, you will need
EFI test harness (pIn 0644-181) and a good digital
multitester (pIn 0644-191).
TPS Removal
NOTE: It is important that the throttle shaft
is completely closed for this procedure.
1. Disconnect the throttle cable from the throttle
shaft. •
2. Rotate the idle screw counterclockwise until it
no longer contacts the throttle shaft stop. The
throttle shaft should now be completely closed.
Open the throttle shaft by hand and release it,
allowing the shaft to snap closed several times.
3. Disconnect the TPS wiring harness from the
main harness; then remove the two screws
securing the TPS to the throttle body housing
and remove the sensor.
TPS Installation
1. Apply a light coat of silicone grease to the area
around the outside of the TPS flange.
2. Install the new TPS onto the throttle shaft by
aligning its "flat" with the throttle shaft "flat".
3. Install the two screws, flat washers, and lock
washers securing the sensor to the throttle
body. Do not tighten at this time.
4. With all switches in the OFF position, discon­
nect the main harness from the ECU and insert
the EFI Test Harness (pin 0644-181) between
the ECU and main harness.
5. Connect the TPS wiring harness to the main
harness.
6. Set the digital voltmeter on the DC voltage
scale; then touch its leads to pins 3 and 17 and
turn on the snowmobile switches.
Fig. 3-93
0729-602
7. While observing the digital voltmeter, slowly
rotate the sensor until .538 volts is observed on
the LCD (Liquid Crystal Display) of the multime ­
ter. While holding the sensor in this pOSition,
tighten the two screws securely, which secure
the sensor to the throttle body.
8. Gently snap the throttle open and closed sev­
eral times to check the TPS voltage. If it has
changed from the .538 speCification, loosen the
two screws which secure the sensor and make
necessary adjustments.
9. Connect the throttle cable to the throttle shaft.
79