2006 Ski Doo REV Service Shop Manual, Page 227Get this manual
Section 05 ENGINE MANAGEMENT (POWER TEK) Subsection 03 (COMPONENT INSPECTION, REPLACEMENT AND ADJUSTMENT)
Before replacing an ECM, always check electrical connectionsMake sure that they are very tight and they make good contact and that they are corrosion- freeParticularly check ECM ground connectionsEnsure that contacts are good and cleanA "defective module" could possibly be repaired simply by unplugging and replugging the ECMThe voltage and current might be too weak to go through dirty wire pinsCheck carefully if pins show signs of moisture, corrosion or if they look dullClean pins properly and then coat them prior to assembling as follows: NOTE: Do not apply dielectric grease or other lubricant on the ECM connectorsIf the newly replaced ECM works, try the old one and recheck if it worksEnsure that all electronic components are genuine.Any modification on the wiring harness may lead to generate fault codes or bad operationNOTE: For diagnostics purposes, use Vehicle Communication Kit (VCK)See DIAGNOSTIC PROCEDURES for proper connectorsadaptorsNOTE: After disconnecting ECM connector for test and then reconnecting it, it will be necessary to READ data from vehicle again to re-enable B.U.D.ScommunicationOtherwise, the following message will appear at some point