Detroit DD16 EPA07 (2007-09) Fault Code: SPN 647 FMI 3 (MCM) Fan Circuit Short to Power

DESCRIPTION:
Fan stage 1 circuit failed high.

MONITORED PARAMETER:
Fan control solenoid.

TYPICAL ENABLING CONDITIONS:
Always enabled

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Always enabled

TYPICAL DURATION:
2 seconds

DASH LAMPS:
CEL

ENGINE REACTION:
None

VERIFICATION:
Engine Idle: One minute.

PROBABLE CAUSES:
1. Wiring between the fan control solenoid and the 120-pin MCM connector.
2. Fan control solenoid failure.

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