Detroit DD15 EPA10 (2010-13) Fault Code: SPN 4353 FMI 4 (ACM) Diffuser Heater Circuit Failed Low

DESCRIPTION:
Diffuser heater circuit failed low.

MONITORED PARAMETER:
Diffuser Heater

TYPICAL ENABLING CONDITIONS:
1. DEF Tank Temperature is less than -3.33°C (26°F).
2. Ambient Temperature is less than 10°C (50°F).

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Continuous when enabling conditions met.

TYPICAL DURATION:
Two seconds

DASH LAMPS:
1. MIL
2. CEL

ENGINE REACTION:
Derate 10%

VERIFICATION:
Output component test.

NOTE: If code not active, release vehicle to customer.

PROBABLE CAUSES:
1. DEF metering unit diffuser heater.
2. DEF metering unit diffuser heater connector/harness.
3. DEF doser valve.

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