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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