Detroit DD15 GHG14 (2014-16) Fault Code: SPN 520323 FMI 4 (ACM) High Side Digital Output Circuit Failed Low
DESCRIPTION:
High side digital output circuit failed low.
MONITORED PARAMETER:
DEF dosing unit voltage.
TYPICAL ENABLING CONDITIONS:
DEF dosing enabled.
MONITOR SEQUENCE:
None
EXECUTION FREQUENCY:
Continuous when enabling conditions met.
TYPICAL DURATION:
Five seconds
DASH LAMPS:
1. MIL
2. CEL
ENGINE REACTION:
Derate 25%
VERIFICATION:
Parked regen
PROBABLE CAUSES:
1. DEF Dosing unit connector.
2. Wiring between the DEF dosing unit and ECM.
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