SPN 524289 FMI 4 identifies the Detroit DD Series fault “Diesel Particulate Filter (DPF) regen switch short to ground on the CPC4 #4 connector pin 17 circuit” for engines on the GHG14 emissions platform. This fault-code sheet documents SPN 524289 / FMI 4 together with the diagnostic steps a technician follows with a diesel diagnostic tool.
Official document details
| Brand | Detroit (Detroit Diesel) |
| Model coverage | DD Series diesel engines (EPA 2007-Current) |
| System / Group | DTCs — fault code reference |
| Publication no. | TruckFaultCodes.com reference, 2017 |
| Year / Revision | GHG14 |
| Pages | 1 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification
- Fault description
- Identify the DPF regen switch circuit
- Review CPC4 #4 connector pin 17
- Reference OEM wiring schematic
- Module and OEM references
Applicable truck models covered
This fault-code sheet applies to Detroit DD Series diesel engines on the GHG14 emissions platform. It describes the diesel particulate filter (dpf) regen switch short to ground on the cpc4 #4 connector pin 17 circuit condition reported under SPN 524289 / FMI 4. Detroit documentation notes that some CPC4 digital outputs share an SPN with Motor Control Module (MCM2.1) faults, so the diesel diagnostic tool makes the distinction. For official service resources, see Detroit’s official website.
Understanding SPN 524289 FMI 4
This sheet identifies the fault as “Diesel Particulate Filter (DPF) regen switch short to ground on the CPC4 #4 connector pin 17 circuit”. Using a diesel diagnostic tool, the procedure first checks for related Common Powertrain Controller (CPC) battery-voltage codes and other active faults, then works through the documented steps. The sheet points the technician to the pin 17 circuit of the CPC4 #4 connector and to Original Equipment Manufacturer (OEM) wiring schematics, noting that CPC4 digital outputs can share an SPN with MCM2.1 faults.
Who needs the SPN 524289 FMI 4 sheet
Detroit diesel technicians, DD Series fleet workshops and mobile repair units use this fault-code sheet to read the condition correctly, follow the right diagnostic path with a diesel diagnostic tool, and reference Original Equipment Manufacturer literature for the matching wiring schematics before making a repair.
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