2006-2008 Polaris Snowmobiles FS/FST Service Manual., Page 120Get this manual
EFIIgnition Systems Wire Harness Diagnostics
Many of the diagnostics in Digital Wrench lead to checking the wire harnessA harness can have an open circuit, be shorted to ground, or shorted to +12VOpen circuits can be caused by broken wires, connectors with terminal not seated correctly, or poor crimping or broken wires at crimpBroken wires can be found by following the circuit diagram in Digital Wrench diagnosticsStart at the sensor and check continuity between each connector in the suspect circuitIf an open circuit is identified then the wire between the connectors needs replacementDuring this check the wires should be moved and pulled slightly to check for intermittent breaksThese can be found at crimps where the wire is crimped to terminal by the conducting wire as well as the plastic insulationThe wire may be broken at the crimp but the crimp on the insulation is holding the crimp togetherAs the wire harness vibrates and moves during operation the circuit makes intermittent contact causing the diagnostic codeIf there are no broken wires check for terminals that are not seated correctly in the connectorThis can cause break in the circuit because the male terminal does not seat in the female terminalCheck each connector in the circuit as the continuity test is performed in the search for broken wiresUse the same procedure to check for shorted wiresCheck the circuit from connector to connector until the short is located, then replace the harness or fix the circuit in the wire harnessWhen looking for wire shorted to +12v check for voltage in the circuit instead of checking continuityIntermittent diagnostic codes are most likely break or short in the wire harness or bad connector