2009-2010 Ski-Doo REV-XP/XR 2 Stroke and REV-XR 1200 4-TEC Service Manual, Page 323Get this manual
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Section 04 FUEL SYSTEM Subsection 04 (E -TEC DIRECT FUEL INJECTION)
APS Inspection
Open RH side panelIf resistance value is correct, wiringconnectors are good sensor and Ensure sensor hose