2003 Ski-Doo ZX Series Factory Shop Manual, Page 288Get this manual
Section 06 ELECTRICAL Subsection 06 (TESTING PROCEDURE)
After procedure is completed, ensure engine idle speed with engine hot is 18002000 RPMStop the engine
SYSTEM TESTING IGNITION SYSTEM TESTING SEQUENCE
In the case of ignition problems, check the following in the prescribed order until the problem can be solved1Sparkingspark plug condition2Electrical connectors3Ignition switch, DESS switch or tether cut-out switch and engine cut-out switch4Ignition generator coil5Trigger coil6MPEM voltage (liquid cooled models only)7High voltage coil (liquid cooled models only)8Buzzer testing
ACCESS TO MPEM CONNECTORS
Fan Cooled Models To ease electrical readings on MPEM connectors, connector cap must be removedHold connector in hands then lift both tabs to remove connector cap
LIGHTING SYSTEM TESTING SEQUENCE
1Electrical connectors2Magneto output (lighting generator coil)