2004 Skidoo ZX Series Service Manual, Page 327Get this manual

Section 06 ENGINES MANAGEMENT (2-TEC) Subsection 02 (COMPONENT INSPECTION AND ADJUSTMENT)
If out of specification, replace the sensorIf resistance tests good, reconnect the ATS and disconnect the connector DA on the ECM7 2
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Using multimeter, recheck resistance value between terminals and 21If resistance value is correct, try new ECMRefer to ECM REPLACEMENT procedures elsewhere in this sectionNOTE: Check if wiring harness shows any signs of scoring prior to replace the ECMIf resistance value is incorrect, repair the connectors or replace the wiring harness between ECM connector and the ATS

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