Detroit DD15 GHG14 (2014-16) Fault Code: SPN 5435 FMI 7 (ACM) Non Diesel Exhaust Fluid Flow Situation

NOTE: This code sets when the aftertreatment control module (ACM) detects that the diesel exhaust fluid (DEF) pump speed is too low when activated.

DESCRIPTION:
Non DEF flow situation.

MONITORED PARAMETER:
DEF pump speed.

TYPICAL ENABLING CONDITIONS:
DEF pump enabled and cannot operate above a DEF pump speed threshold.

MONITOR SEQUENCE:
DEF pump is enabled.

EXECUTION FREQUENCY:
Service tool and infrequent in-use checks during on DEF dosing conditions.

TYPICAL DURATION:
Two seconds

DASH LAMPS:
1. MIL
2. CEL

ENGINE REACTION:
Derate 25%

VERIFICATION:
Selective catalyst reduction airless dosing system (SCR ADS) self-check.

NOTE: If codes 4374-3, 4374-4, or 4374-5 are active, fix those first.

PROBABLE CAUSES:
1. Inspect the DEF pump harness wiring & connector.
2. Failed DEF pump.