SPN 715 FMI 3 is the Detroit DD Series diagnostic sheet that explains vehicle speed short to power on GHG14 engines. This code flags a vehicle speed fault caused by a short to power on the pin 12 circuit of the Common Powertrain Controller (CPC) #4 connector. Detroit notes CPC4 digital outputs share an SPN with certain Motor Control Module (MCM2.1) faults, so the diesel diagnostic tool makes the distinction between the MCM and the CPC when it reads the code. Wiring schematic detail is taken from the OEM literature. This DiagTechPro library page outlines what the 1 page PDF contains before you download it.
SPN 715 FMI 3 document details
| Brand | Detroit |
|---|---|
| Model coverage | Detroit DD Series (EPA 2007–Current) |
| System / group | CPC digital output / vehicle speed |
| Fault code (SPN / FMI) | 715 / 3 |
| Fault type | Vehicle speed short to power |
| Emissions platform | GHG14 |
| Source | TruckFaultCodes.com (Copyright © 2017) |
| Pages | 1 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification (SPN and FMI reference)
- Fault description and affected circuit
- Step-by-step troubleshooting procedure
- Parameter configuration and connector checks
- Circuit repair instructions
Applicable truck models and engines
This fault sheet applies to Detroit DD Series engines built to the GHG14 emissions platform. It is used with the Detroit diesel diagnostic tool, and with ServiceLink where module configuration must be confirmed. Detroit publishes these fault codes through TruckFaultCodes.com, and the same SPN can appear on more than one module, so confirm the reading before ordering parts. For engine coverage and official service literature, see the Detroit official support site.
Who needs the SPN 715 FMI 3 sheet
Fleet technicians and Detroit-certified workshops troubleshooting this CPC digital output fault need this sheet to follow the correct checks instead of guessing at parts. It suits technicians confirming the reading belongs to the CPC output before tracing the pin 12 short to power.
The complete 1 page PDF is available in the DiagTechPro manuals library; a free account is required to download it.
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