Arctic Cat Sno Pro 120 Service Manual page 240

3. Install the sensor to the throttle body. Do not tighten
at this time.
4. Adjust the TPS (see appropriate Adjusting TPS in
this sub-section).
5. Disconnect the adjustment tool harness from the
TPS. Connect the snowmobile TPS harness to the
newly installed or adjusted TPS.
 NOTE: Before installing the TPS harness connector,
apply dielectric grease to the connector pins.
6. On the 800 cc, install the resonator and expansion
chamber.
ADJUSTING TPS (1100 cc)
 NOTE: Adjusting the TPS is for out of warranty
snowmobiles only.
 NOTE: The throttle shaft must be against the throt-
tle stop for this procedure.
CAUTION
Never adjust the throttle plate stop screw and nut. The
idle circuit is controlled by the ISC valve.
1. Disconnect the harness connector from the TPS.
2. Loosen the screw(s) of the throttle position sensor to
allow adjustment.
3. Using Throttle Position Sensor (TPS) Adjustment
Tool Kit, connect its wiring harness to the TPS. Con-
nect the red and black digital voltmeter leads to the
white and black jacks of the TPS adjustment tool.
4. While observing the digital voltmeter, slowly rotate
the sensor until idle voltage specification is observed
on the LCD of the multimeter. While holding the
sensor in this position, tighten the screw(s) securing
the sensor to the throttle body securely.
5. Gently snap the throttle open and closed several
times to check the TPS voltage. If it has changed
from the idle voltage specification, loosen the
screw(s) securing the sensor and make necessary
adjustments.
6. With the idle position set to specification, compress
the throttle lever to the full-open position. The full-
open specification should be observed. Gently snap
the throttle lever open and closed several times and
note if the reading remains within the specification.
 NOTE: If, after adjusting the Throttle Position Sen-
sor to the IDLE specification, the FULL-OPEN is less
than 4.30 volts, recheck the IDLE setting. If the IDLE
setting is correct, replace the sensor.
Engine Idle
1100 cc Non-Turbo 1.10-1.14
1100 cc Turbo 0.69-1.11
REPLACING TPS (1100 cc)
 NOTE: Replacing the TPS is for out of warranty
snowmobiles only.
5-6
Full-Open
4.30-4.50
4.00-4.20
Removing
 NOTE: On the F/M/XF non-turbo, remove the hood,
seat (see Section 8), and gas tank (see Section 4). On
the F/M/XF turbo, remove the hood, upper console,
and lower console.
1. Disconnect the throttle cable from the throttle pul-
ley.
2. Disconnect the TPS wiring harness from the TPS;
then noting the position of the TPS, remove the
screw(s) securing the TPS to the throttle body hous-
ing and remove the sensor. Account for the O-ring
fitting into the groove of throttle body.
Installing
1. Apply a light coat of silicone grease to the area
around the outside of the TPS flange and into the O-
ring groove. Install the O-ring into the groove.
2. Install the new TPS onto the throttle shaft by align-
ing the "flats" on the throttle shaft cam with the
alignment points of the sensor; then rotate the sensor
until properly positioned on the throttle body.
3. Install the screw(s), flat washer(s), and lock
washer(s) securing the sensor to the throttle body. Do
not tighten at this time.
4. Adjust the TPS (see appropriate Adjusting TPS in
this sub-section).
5. Disconnect the adjustment tool harness from the
TPS. Connect the snowmobile TPS harness to the
newly installed or adjusted TPS.
 NOTE: Before installing the TPS harness connector,
apply dielectric grease to the connector pins.
ZJ254A
TZ119A