This CPC4 frequency output circuit sheet documents Detroit SPN 3480 FMI 5, an open on pin 15 of the Common Powertrain Controller (CPC4) #4 connector for frequency output 4. It checks the parameter setup before any wiring repair. Follow it in order.
Official document details
| Brand | Detroit |
|---|---|
| Model coverage | DD Series (EPA 2007-Current); also filed under Series 60 (DDEC VI – EPA 2007) |
| System / Group | DTCs — Frequency Output 4 – Open Circuit on CPC4 #4 Connector Pin 15 |
| Fault code | SPN 3480 / FMI 5 |
| Source | www.TruckFaultCodes.com (© 2017) |
| Pages | 1 |
| File size | 0.2 MB |
| Format | |
| Language | English |
CPC4 frequency output circuit diagnostic guide
With the key on and the diagnostic tool connected, the technician opens the parameters work window and confirms that PGR009 frequency output is configured for the correct device, such as a tachometer. If the parameters are wrong they are set properly; if they are correct, the short to ground on the pin 15 branch of the CPC4 #4 connector is repaired, with the wiring schematic taken from Original Equipment Manufacturer (OEM) literature. It is a short, configuration-then-wiring reference.
Document table of contents
- Fault code identification: SPN 3480, FMI 5
- Fault condition: open circuit on CPC4 #4 pin 15
- Frequency output parameter verification (PGR009)
- Pin 15 wiring repair with OEM schematic
Applicable truck models
This procedure applies to Detroit DD Series engines built for EPA 2007 and later, covering GHG14 calibrations as printed on the document cover, and the identical SPN/FMI sheet is also filed under Detroit Series 60 (DDEC VI, EPA 2007). Confirm the emissions platform on your truck and cross-check the connector and pin numbers against the official Detroit engine support site before making any repair.
Who needs this CPC4 frequency output circuit manual
A technician on a GHG14 Detroit truck with a frequency output complaint, such as a dead tachometer feed, uses this sheet to confirm the parameter setup before repairing the controller wiring.
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