Arctic Cat Sno Pro 120 2011, Service Manual

Page: 268 / 535

5
5-7
REPLACING TPS

NOTE: Replacing the TPS is for out of warranty
snowmobiles only.

NOTE: It is important that the throttle shaft is in the
completely closed position for this procedure.
Removing
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.
3. Disconnect the TPS wiring harness from the TPS;
then noting the position of the TPS, remove the two
screws securing the TPS to the throttle body housing
and remove the sensor. Account for the O-ring which
fits into groove of throttle body.
Installing
1. Apply a light film of silicone grease to the O-ring.
Install the O-ring into the groove.
MS399
2. Install the new TPS onto the throttle shaft by align-
ing the “flats” on the throttle shaft cam with the
“flats” on the sensor; then rotate the sensor until
properly positioned on the throttle body.
MS400A
3. Install the two screws, flat washers, and lock washers
securing the sensor to the throttle body. Do not
tighten at this time.
4. Adjust the TPS - see Adjusting TPS in this sub-sec-
tion.
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.
Throttle Position Sensor
(4-Stroke)

NOTE: On the non-turbo models, remove the air
silencer. Proceed to Air Silencer (1100 cc Non-Turbo)
sub-section in Section 3 and follow steps 1-12 of
REMOVING.

NOTE: On the turbo models, remove the console
and left-rear spar panel.
VERIFYING TPS ADJUSTMENT TOOL
Before using the TPS adjustment tool, verify its battery
condition. The battery used in the tool is a 9-volt battery.
To check battery condition, use a digital volt/ohmmeter
set on DC volt scale. Test between the adjustment tool
black and red jacks. Insert the red lead of the digital volt-
meter into the red jack of the adjustment tool and the
black lead of the digital voltmeter into the black jack of
the adjustment tool. The green power light of the ana-
lyzer should now be illuminated. If voltage is found
below 4.9 volts, replace the battery.

NOTE: The appropriate Test Harness must be
plugged into the analyzer for testing voltage. Always
verify battery voltage is at least 4.9 DC volts for accu-
racy.
CHECKING TPS

NOTE: If the snowmobile is in warranty, breaking
the seal on the idle screw jam nut or the Phillips-head
screws on the TPS will void warranty. If the TPS is
tested out of specification, the throttle body must be
replaced. If the snowmobile is out of warranty, pro-
ceed to Adjusting TPS.
Model
TPS TOOL
(DC VOLTS)
ANALYZER TOOL
(DC VOLTS)
500 cc Full-Closed 0.412-0.414
Idle 0.710-0.818 0.710-0.818
Full-Open 3.472-4.048 3.470-4.046
600 cc Full-Closed 0.412-0.414
Idle 0.646-0.754 0.646-0.754
Full-Open 3.472-4.485 3.470-4.485
DIAGNOSTIC TOOL
800 cc Full-Closed 0.412-0.414
Idle 0.646-0.754 3.99° -6.66°
Full-Open 3.472-4.485 74.97°-89.37°
1000 cc Full-Closed 0.392-0.394
Idle 0.591-0.699 4.75°-7.55°
Full-Open 3.477-4.054 77.39°-91.66°
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