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Detroit DD16 GHG14 (2014-16) Fault Code: SPN 3599 FMI 4 (MCM) Motor Control Module Internal Fuel Injector Power Supply Failed Low

DESCRIPTION:
Motor Control Module (MCM) internal fuel injector power supply failed low.

MONITORED PARAMETER:
MCM internal fuel injector power supply.

TYPICAL ENABLING CONDITIONS:
Always enabled

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Always enabled

TYPICAL DURATION:
Two seconds

DASH LAMPS:
1. MIL
2. CEL

ENGINE REACTION:
Derate 25%

VERIFICATION:
Engine Idle (1 minute).

PROBABLE CAUSES:
1. Doser heater.
2. Doser heater lines 1, 3, or 4.
3. ACM (Aftertreatment Control Module) failure.
4. Short to battery between ACM pins 9, 15, 39, or 2 and their components.
5. Reconnect items in #4 one at a time and clear the fault code after each connection. When fault becomes active, replace the components.

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