Arctic Cat Cougar Service Manual page 249

FUEL SYSTEM-FUEL-INJECTED MODELS
chip, the ECU housing and each of the
injector units. For the system to operate
correctly, the marks of each unit must be
the same as the marks on the other parts.
If
ordering replacement parts, know the
marking code of the other components.
4. Remove the spark plugs and ground the spark
plugs to the engine.
5. Tum switches ON.
NOTE
Step 6 checks the injector voltage to the
injector on the MAG side. Step 7 checks
the injector voltage to the injector on the
PTOside.
NOTE
These measurements are peiformed us-
ing reverse polarity to obtain an accu-
rate reading.
6. Connect the black (negative) voltmeter lead
to pin No.2 (Figure 5) of the diagnostic harness.
Connect the red (positive) voltmeter lead to
ground.
7. Operate the recoil starter rapidly while check-
ing the voltmeter reading. The voltmeter should
indicate approximately 8-10 volts. If the reading
is incorrect, repeat test. If the reading remains
incorrect, check the dropping resistor.
8. Repeat test for the PTO side injector by con-
necting the voltmeter to pin No.3.
®
239
Throttle position sensor-models
prior to
1997. Test the throttle position sensor (TPS),
with the engine not running.
1. Disconnect the electrical plug from the TPS
(Figure 14 ).
2. Use an ohmmeter to read the resistance be-
tween the terminals for the red and black wires.
Resistance should be 4250-6750 ohms.
3. With the throttle at idle, measure the resis-
tance between the black and white wires. Resis-
tance should be 722.5-977.5 ohms.
4. Open the throttle and measure the resistance
between the black and white wires again. Resis-
tance should be 4250-6750 ohms.
5. With the ohmmeter attached to the black and
white wires, move the throttle lever. The resis-
tance should change as the control is moved.
6. Make sure the ignition switch is OFF, then
connect the wiring harness to the terminal of the
throttle position sensor.
7. Attach the diagnostic harness as described in
this chapter.
8. Tum the ignition switch ON.
9. Measure the voltage between pin No. 1 and
pin No. 17 (Figure 5) of the diagnostic harness.
The voltage should be 5.22-5.02 VDC.
10. If the voltage measured in Step 9 is zero,
continue to check as follows.
a. Battery voltage should be 12.6-12.8 VDC.
b. Make sure all of the switches are ON and
working. The battery light on the console
should glow.
c. Check the condition of the 3 amp fuse (Fig-
ure 3).
d. If the voltage is low, but the checks in
substeps 1 Oa-1 Oc are okay, detach the wir-
ing harness from the throttle position sen-
sor. If the voltage in Step 9 is now within
limits, the throttle position sensor is faulty.
11. Measure the voltage between pin No. 3 and
pin No. 17 (Figure 5) of the diagnostic harness.
The voltage should be 0.82-0.825 VDC. If the
voltage is too high, make sure the throttle is at
idle position (fully closed) ..