Caution, Features and controls, Malfunction indicator lamp (mil) – Polaris 2003 Frontier User Manual
Page 31: Mil diagnostic code summary
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FEATURES AND CONTROLS
Malfunction Indicator Lamp (MIL)
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.
MIL Diagnostic Code Summary
CODE
MIL
Description
21
Yes
Lost synchronization
Synchronization of crankshaft position lost
22
Yes
Throttle position sensor circuit error
Sensor signal is shorted to ground or at battery potential
23
Yes
RAM error
Hardware failure or serial EEPROM not initialized or failure
24
Yes
Speed circuit / sensor error
Crankshaft position sensor failure (if MIL stays on when cranking
there is no speed sensor input)
31
Yes
System too lean
Lambda sensor shorted to ground or battery voltage
32
Yes
02 Sensor circuit error
Short to battery or no activity detected
33
No
System too rich
Short term adaption at upper or lower limit.
34
No
Maximum adaption limit reached
Long-term adaption at upper or lower limit
42
Yes
Temperature sensor circuit error
Sensor short to ground/battery voltage/implausible signal
61
NA
End of sequence message
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.
CAUTION