2001 Ski-Doo Factory Shop Manual Volume One, Page 90Get this manual
Section 03 TROUBLESHOOTING Subsection 05 (ELECTRICAL SYSTEM)
SYMPTOM CONDITION TestInspection
RER (ROTAX ELECTRONIC REVERSE) DOES NOT WORKNORMAL USE1Check idle speedaWrong idle speedAdjust according to specification (refer to TECHNICAL DATA)2Check spark plugaFaulty spark plugReplace3Check drive belt deflectionaWrong deflectionAdjust according to specification (refer to TECHNICAL DATA)4Check carburetor synchronization and air screw adjustmentaWrong adjustmentAdjust according to specification (refer to TECHNICAL DATA) and read carburetor subsection5Check electrical connectionsaBad electrical connections or damaged wiresClean or replace6Check MPEMaFaulty MPEMReplace
CONDITION TestInspection
AT HIGH ALTITUDE1Check high altitude cap continuityaBroken jumper inside high altitude capReplace high altitude cap