SPN 1348, FMI 5 - Fuel Pump Relay Coil Open

SPN 515, FMI 16 - RPM Above Fuel Rev Limit Level

Diagnostic Aids

NOTE: If any other DTCs are present, diagnose those first.

Ensure that no programmed governor speeds exceed the limit set in the diagnostic calibration for Max Gov Override Speed Check mechanical operation of the throttle Check the engine intake for large air leaks downstream of the throttle body

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SPN 515, FMI 0 - RPM Above Spark Rev Limit Level

• Spark Rev Limit- Crankshaft Position Sensor • Check Condition-Engine Running • Fault Condition-Engine speed greater than the Spark Rev Limit speed as defined in the diagnostic calibration • Corrective Action(s): Illuminate MIL and/or sound audible warning or illuminate secondary warning lamp, disable ignition coils. Recommend disabling closed loop and adaptive learn fueling corrections while fault is active • Non-emissions related fault

This fault will set anytime the engine RPM exceeds the limit set in the diagnostic calibration for the latch time or more. This speed overrides any higher max governor speeds programmed by the user. This fault is designed to help prevent engine or equipment damage and will disable the ignition coils to reduce engine speed. In addition, the throttle will be lowered in order to govern the engine to the speed set in the diagnostic calibration for Max Gov Override and the fuel injectors or gaseous fuel control actuator will be disabled to reduce the engine speed below the speed set in the diagnostic calibration for Fuel Rev Limit.

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