SPN 3510 FMI 4 is documented in this Detroit DD Series fault code reference PDF, which covers the 5V Sensor Supply Bank 2 Circuit Failed Low condition on Detroit engines. The 2-page document lists the fault description, the step-by-step troubleshooting sequence and the connector measurements a technician uses to confirm the repair.
Official document details
| Brand | Detroit |
|---|---|
| Model coverage | Detroit DD Series (EPA 2007-Current) engines across all model years using the MCM |
| System / group | DD Series (EPA 2007-Current) / DTCs |
| Diagnostic code | FMI 4 / SPN 3510 |
| Year / revision | Source dated 2017 |
| Pages | 2 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification: SPN 3510, FMI 4
- 5V sensor supply bank 2 failed low
- Component isolation with diagnostic tool
- Sensor-by-sensor disconnection
- Engine harness 31-pin check
- Harness or MCM replacement
Applicable truck models and engines
This fault code applies to Detroit DD Series (EPA 2007-Current) engines across all model years using the MCM, and the DiagTechPro library also files it under the Series 60 (DDEC VI, EPA 2007) DTC set. The diagnostic references the Motor Control Module (MCM) used on these Detroit powertrains. See the manufacturer’s Detroit official website for current engine specifications and dealer support.
SPN 3510 FMI 4 troubleshooting overview
With the diesel diagnostic tool connected and the ignition on, the technician disconnects the listed sensors one at a time, watching whether the fault goes inactive. The list includes the fuel line pressure, fuel compensation pressure, engine oil pressure, inlet manifold pressure/temperature, DPF inlet and outlet pressure sensors, intake throttle valve and camshaft position sensor. If no single component clears the fault, the engine harness 31-pin connector and finally the MCM 120-pin connector are disconnected, with a note to check the aftertreatment sensor box harness for chafing.
Who needs this SPN 3510 FMI 4 manual
Detroit-certified technicians, independent truck repair shops and fleet maintenance teams will use this reference to follow the factory diagnostic sequence with a diesel diagnostic tool before replacing any control module or sensor.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download it, alongside the related Detroit Power Service Literature.
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