Tps Setting Adjustment; Idle Speed Stop - Arctic Cat Cougar Service Manual

FUEL SYSTEM-FUEL-INJECTED MODELS
zation, both throttle plates must begin to open at
exactly the same time and continue to be open
the same amount throughout their operating
range.
Throttle synchronization should not change
during normal operation, but you should check
it when the throttle body assembly is removed or
if the engine suffers from reduced performance
and synchronization problems are suspected.
Refer to Throttle Body Assembly Removal/In-
stallation in this chapter for synchronizing the
opening and closing of the two throttle valves.
CAUTION
Maintaining throttle cable free play is
critical to prevent throttle cable damage.
TPS Setting
On magneto-powered EFI systems, the throt-
tle position sensor (TPS) attached to the end of
the throttle body assembly at the factory, should
not be removed or adjusted. If the TPS is faulty,
the throttle body and TPS should be replaced as
a unit.
The throttle position sensor (TPS) on battery-
powered EFI systems has elongated mounting
holes to allow adjustment when installing. It may
be necessary to synchronize the TPS with the
throttle plates if the TPS has been replaced or
moved during servicing. Use the following pro-
cedure to adjust the position of the throttle posi-
tion sensor on battery-powered systems.
1. Open the hood and make sure the wiring.
harness is attached to the TPS.
2. Back out the idle speed screw (Figure 32) so
the throttle plates will close completely.
3. Open the throttle and allow it to snap closed
several times to make sure the throttle plates
close completely. If not, adjust the throttle cable.
4. Make sure the ignition switch is OFF, then
attach the diagnostic harness as described in this
chapter.
5. Loosen the screws attaching the TPS to the
throttle body.
255
6. Tum the ignition switch ON and measure the
voltage between pin No. 3 and pin No. 17 (Fig-
ure 5) of the diagnostic harness.
7. Rotate TPS, as required, until the voltage is
exactly 0.538 VDC, then tighten the TPS mount-
ing screws.
NOTE
If
the voltage measured between pins No.
3 and No. 17 keeps changing, the sensor
may be faulty. Before installing a new
sensor, be sure the throttle cable is not
sticking.
8. Open and close the throttle several times to
make sure the voltage remains the same as set in
Step 7. Readjust if necessary.
NOTE
Leave the diagnostic harness in place
until the idle speed stop has been set.
9. Set the idle speed stop as described in this
chapter.
Idle Speed Stop
Use the following procedure when adjusting
the idle speed stop on battery-powered EFI sys-
tems.
1. Check the TPS setting as described in this
chapter. Leave the diagnostic harness in place to
set the idle speed stop.
NOTE
If
the diagnostic harness is not yet in-
stalled, make sure the ignition switch is
OFF before attaching the diagnostic
harness as described in this chapter.
2A. Battery-Powered EFI Systems-Tum the ig-
nition switch ON and measure the voltage be-
tween pin No.3 and pin No. 17 (Figure 5) of the
diagnostic harness.
2B. Magneto-powered EFI Systems-Tum the
ignition switch ON and measure the voltage
between pin No. 20 (Figure 5) of the diagnostic
harness and ground.