2010 Polaris Sportsman 850 Service Manual, Page 53Get this manual

2010 Polaris Sportsman 850 Service Manual, Page 53

ELECTRONIC FUEL INJECTION FUEL LINE Quick Connect RemovalInstallation CAUTION Verify fuel system has been depressurized before
damaged, repair; if contaminated, cleanReconnect and check functionIf problem persists, perform sensor bench test according
to the specific sensor requirements (if applicable)If the sensor bench tests pass, disconnect the connector at the ECU and
perform continuity check between the sensor connector and the appropriate pin at the ECU connector (all connections for that
sensor)Wiring resistance should be less than one (1) ohmIf the resistance is high (or open), wiring harness inspection is
required (including thorough inspection of the ECU connector for contamination or damage)If the sensor passes and the wiring
passes inspection, and reconnecting the ECU does not resolve the issue, then at that point known-good ECU (from another Polaris
850) may be used to test for problem resolution Never attempt to service any fuel system component while engine is running
or ignition switch "on" USE CARE when removing or installing the ECU connector, as well as all other harness connections