2003 Polaris Frontier Owners Manual - Page 31

Malfunction Indicator Lamp (MIL) FEATURES AND CONTROLS The Frontier is equipped with a malfunction indicator lamp (CHECK ENGINE light) to assist your Polaris dealer in diagnosing problems. The MIL codes are for reference only. Full diagnostics must be performed by a Polaris dealer trained to service EFI systems. When enabled, the CHECK ENGINE light will blink in numerical sequences to indicate the type of failure. For example: two blinks, pause, one blink is the sequence for code 21. To enable the blink codes, put a 30 amp automotive fuse in the ACS bypass three times within 2 1/2 seconds, leaving it in the third time. NOTE: Disconnect the negative battery lead for 10 seconds to clear the code. CAUTION If the ACS 30 AMP bypass fuse is left in, electrical drainage will occur. To avoid electrical drainage, always remove the fuse from the ACS bypass AFTER the End of Sequence message (61) appears. MIL Diagnostic Code Summary CODE 21 22 23 24 31 32 33 34 42 61 MIL Yes Yes Yes Yes Yes Yes No No Yes NA Description Lost synchronization Synchronization of crankshaft position lost Throttle position sensor circuit error Sensor signal is shorted to ground or at battery potential RAM error Hardware failure or serial EEPROM not initialized or failure Speed circuit / sensor error Crankshaft position sensor failure (if MIL stays on when cranking there is no speed sensor input) System too lean Lambda sensor shorted to ground or battery voltage 02 Sensor circuit error Short to battery or no activity detected System too rich Short term adaption at upper or lower limit. Maximum adaption limit reached Long-term adaption at upper or lower limit Temperature sensor circuit error Sensor short to ground/battery voltage/implausible signal End of sequence message 29