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Detroit DD15 GHG14 (2014-16) Fault Code: SPN 3597 FMI 3 (MCM) High Side Digital Output 1 Circuit Failed High

DESCRIPTION:
High side digital output 1 circuit short to power.

MONITORED PARAMETER:
High side digital output 1 circuit.

TYPICAL ENABLING CONDITIONS:
Always on

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Continuous when enabling conditions met.

TYPICAL DURATION:
One second

DASH LAMPS:
1. MIL
2. CEL

ENGINE REACTION:
Derate 25%

VERIFICATION:
Ignition key cycle.

PROBABLE CAUSES:
For 2010 EPA Engines:
1. Short to power between pin 1 of the Jake brake solenoid and pin 66 of the MCM 120-pin connector.
2. Short to power between pin 2 of the Jake brake solenoid and pin 91 of the MCM 120-pin connector.

For 2014 EPA Engines:
1. DEF Dosing unit harness connector.
2. Short to battery voltage between pin 4 of the harness side of the DEF dosing unit harness connector and pin 3 of the ECM 120-pin connector.
3. Short between pin 3 of the harness side of the DEF dosing unit harness connector and pin 22 of the ECM 120-pin connector.

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