The SPN 925 FMI 4 document is a Detroit DD Series diagnostic trouble code guide covering the digital output 3 17 short to ground on the CPC4 #3 connector condition and its step-by-step troubleshooting. This 1 page PDF is compiled from the TruckFaultCodes.com Detroit fault codes reference (© 2017) for the DD Series (EPA 2007-Current) / DTCs set. It is written for workshop diagnostics rather than general reading.
Official document details
| Brand | Detroit |
| Model coverage | Detroit DD Series (EPA 2007-Current) engines |
| System / Group | DD Series (EPA 2007-Current) / DTCs |
| Diagnostic trouble code | SPN 925/FMI 4 — Digital Output 3 17 Short to Ground |
| Publication no. | Not stated (TruckFaultCodes.com DTC reference) |
| Year / Revision | © 2017 |
| Pages | 1 |
| File size | 0.2 MB |
| Format | |
| Language | English |
SPN 925 FMI 4 document sections
- Fault code identification: SPN 925/FMI 4 — digital output 3 17 (short to ground on CPC4 #3 pin 17)
- Connecting the diesel diagnostic tool and opening the parameters work window
- Verifying PGR035 digital output parameters for the configured component
- Fixing the short to ground on pin 17 of the CPC4 #3 connector per OEM literature
Applicable truck models covered
The SPN 925 FMI 4 fault applies to trucks fitted with Detroit DD Series (EPA 2007-Current) engines and the associated Common Powertrain Controller and Motor Control Module modules, covering GHG14 calibrations. The procedure references Common Powertrain Controller, CPC4 connector, diesel diagnostic tool and OEM literature, and works through verifying the PGR035 digital output parameters, then fixing the short to ground on pin 17 of the CPC4 #3 connector. Confirm the engine and emissions configuration against the vehicle build before ordering parts; verify current procedures on the Detroit Diesel official site.
Who needs this SPN 925 FMI 4 manual
This reference suits Detroit-certified technicians and fleet workshop owners diagnosing the digital output 3 17 short to ground on the CPC4 #3 connector condition on DD Series engines. Every troubleshooting step and decision branch from the original PDF is preserved so the on-vehicle diagnosis can be followed in sequence, and the document names the exact connectors, pins and modules involved. Use it alongside a Detroit-compatible scan tool such as DDDL or DDRS.
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