1990-1998 Arctic Cat Snowmobiles Repair Manual, Page 248Get this manual
238 6If the test in Step fails to operate both injectors, check the following: aCheck the 10 amp fuse (Figure 3)bCheck the battery voltageIt should be 12.6 voltscCheck the dropping resistor as described in this chapterdCheck the wiring harness and connectors for proper connection and broken wireseIf all else checks okay, the problem could be the ECU7If the test in Step checks okay, but the injector fails to operate, clean all pin connectors and make sure that all are properly connected8If the system still fails to operate, check resistance of the injector unit and the injector timing sensor as described in this chapterInjector unit-models prior to 1997The injectors (Figure 13) can be checked by measuring the resistance as follows1Detach the wire connector from the injector2Use an accurate ohmmeter to measure the resistance between the terminals of the injector3The correct resistance is 1.53-2.07 ohmsIf the resistance is incorrect, replace the injectorNOTE The ECU chip and the injector units must be properly matchedA red, yellow or blue paint spot should be on the ECU chip, the ECU housing and each of the injector unitsFor the system to operate correctly, the marks of each unit must be the same as the marks on the other partsWhen ordering replacement parts, know the marking code of the other components