SPN 924 FMI 4 is the Detroit DD Series diagnostic sheet that explains digital output 4 09 short to ground on GHG14 engines. This code is set by a short to ground on the pin 9 circuit of the Common Powertrain Controller (CPC4) #4 connector, reported as digital output 4 09. Detroit notes CPC4 digital outputs share an SPN with certain Motor Control Module (MCM2.1) faults, so the diesel diagnostic tool distinguishes between them. The sheet has the technician verify the PGR035 digital-output parameters in the parameters work window and, once configuration is confirmed, repair the short on the pin 9 circuit. This DiagTechPro library page outlines what the 2 pages PDF contains before you download it.
SPN 924 FMI 4 document details
| Brand | Detroit |
|---|---|
| Model coverage | Detroit DD Series (EPA 2007–Current) |
| System / group | CPC4 digital output 4 09 |
| Fault code (SPN / FMI) | 924 / 4 |
| Fault type | Digital output 4 09 short to ground |
| Emissions platform | GHG14 |
| Source | TruckFaultCodes.com (Copyright © 2017) |
| Pages | 2 |
| 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 924 FMI 4 sheet
Fleet technicians and Detroit-certified workshops troubleshooting this CPC4 digital output 4 09 fault need this sheet to follow the correct checks instead of guessing at parts. It suits technicians confirming parameter setup before repairing the pin 9 circuit back to the CPC4 #4 connector.
The complete 2 pages PDF is available in the DiagTechPro manuals library; a free account is required to download it.
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