Electronic Fuel Injection Error Codes - Arctic Cat Cougar Service Manual

256 CHAPTER SEVEN
3. Tum the idle speed stop screw (Figure 32),
as required, to set the measured voltage to 0.82-
0.825 VDC.
scribed in this chapter. If the closed setting is
correct, the sensor is faulty.
4A. Battery-Powered EFI Systems-Open the
throttle fully and observe the voltage between
pin No. 3 and pin No. 17 (Figure 5).
NOTE
If
the measured voltage keeps changing,
the sensor may be faulty. Before install-
ing a new sensor, be sure the throttle
cable is not sticking.
4B. Magneto-powered EFI Systems-Open the
throttle fully and measure the voltage between
pin No. 20 (Figure 5) of the diagnostic harness
and ground.
6. Start the engine and observe the idle speed.
After the engine reaches operating temperature,
the engine should idle smoothly and speed
should be stable at 1500 rpm.
5. If the wide-open voltage is not 3.81-4.23
VDC, recheck the TPS closed setting as de-
Table 1 ELECTRONIC FUEL INJECTION ERROR CODES
Monitor light symbol Possible cause
1996 and earlier models*
1 long, 1 short Open or short in Throttle Position Sensor (TPS).
1 long, 3 short Open or short in intake air temp sensor.
1 long, 4 short Open or short in engine coolant temp sensor.
2 long, 1 short Faulty #1 (MAG) injector control circuit in ECU or open
or short in circuit to the #1 injector.
2 long, 2 short F~ulty #2 (PTO) injector control circuit in ECU or open
or short in circuit to the #2 injector.
4 long, 1 short Open or short in the injector timing sensor.
4 long, 2 short Open or short in the ignition timing sensor.
1997-on models**
1 flash Open or short in Throttle Position Sensor (TPS).
2 flashes Open or short in engine coolant temp sensor.
3 flashes Open or short in intake air temp sensor.
4 flashes Open or short in the barometric pressure sensor.
5 flashes Faulty fuel injectors.
*The EFI of 1996 and earlier models uses the vehicle battery to energize the system.
**The EFI of 1997-on models is the magneto-powered type and power must be supplied by an external source
via the diagnostic harness.