Detroit fault code SPN 2797 FMI 3 is the TruckFaultCodes.com diagnostic sheet for the Fuel Injector Needle Control Valve Cylinder 1, 2, 3 Shorted to Battery Power condition on Detroit DD-series engines. This 1 page reference lists the fault identification, monitored conditions where shown, and the step-by-step troubleshooting the technician follows in the shop.
Official document details
| Brand | Detroit |
|---|---|
| Model coverage | Detroit DD Series (EPA 2007-Current) |
| System / Group | DD Series (EPA 2007-Current) / DTCs |
| Publication no. | Not printed; TruckFaultCodes.com reference |
| Year / Revision | 2017 |
| Pages | 1 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification (SPN 2797 / FMI 3)
- Description and engine reaction
- Front injector harness disconnect
- Voltage test at the MCM side
- Short-to-power repair or harness replacement
SPN 2797 FMI 3 troubleshooting steps
The sheet monitors Injector Needle Control Valve Cylinder 1, 2, 3. Enabling conditions are engine speed at idle or higher. Typical duration is 2 seconds, the dash lamps are MIL and CEL, and the engine reaction is 25 percent derate.
The single-page routine disconnects the front fuel injector harness 14-pin connector, then with the ignition on measures the voltage between pin 1 on the Motor Control Module (MCM) side of that connector and ground. Voltage present indicates a short to power between the harness and pin 25 of the 120-pin MCM connector, which is repaired; if no voltage is present the under valve cover fuel injector harness is replaced using the three-filter system removal procedure in Power Service Literature.
Applicable truck models
This sheet applies to Detroit DD-series diesel engines (the DD13, DD15 and DD16 family) built under the EPA 2007-Current emissions platform, in its EPA10 / GHG14 calibration. Engine and emissions specifications should always be confirmed against the vehicle build; full engine information is published on the Detroit Diesel official site.
Who needs this SPN 2797 FMI 3 manual
Technicians with a 25 percent derate and a front-bank injector control valve shorted to battery power use this sheet to confirm a short to power before replacing the harness. It is a quick bench reference rather than a full workshop manual, so the named removal steps still route back to Power Service Literature and, where escalation is needed, to the Detroit Customer Support Center.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download it.
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