2005 Ski-Doo REV Series Shop Manual, Page 285Get this manual
Section 06 ENGINE MANAGEMENT (SDI) Subsection 03 (COMPONENT INSPECTION, REPLACEMENT AND ADJUSTMENT)
If resistance value is incorrect, repair the connectors or replace the wiring harness between ECM connector and the CTS
Replacement
Drain cooling systemDisconnect CTS connector and remove CTSInstall the new CTS and torque to 12 Nm (106 lbfin)Reinstall remaining removed partsRefill engine coolant and bleed cooling systemRefer to LIQUID COOLING SYSTEM section
If tests are not good, continue to check the continuity of the rest of the APS circuit on the harnessDisconnect the connector from the ECMUsing multimeter, check continuity of circuits as per following tableCIRCUIT NUMBER (ECM CONNECTOR A) A-3 A-4 A-18 APS CONNECTOR PIN PIN PIN 3
AIR PRESSURE SENSOR (APS)
If wiring harness is good, try new ECMRefer to ECM REPLACEMENT procedures elsewhere in this sectionOtherwise, repair the connectors or replace the wiring harness between ECM connector and the APS
Replacement
Disconnect APS connector and remove the APSThe ATS is retained with screwInstall the new APS