This FCV failed self test sheet documents Detroit SPN 3482 FMI 7, set when the fuel cutoff valve does not pass its self test. It gives a short repair-and-verify routine centred on the hydrocarbon doser. Follow it to replace the correct assembly and confirm the fix.
Official document details
| Brand | Detroit |
|---|---|
| Model coverage | DD Series (EPA 2007-Current); also filed under Series 60 (DDEC VI – EPA 2007) |
| System / Group | DTCs — Fuel Cutoff Valve (FCV) Failed Self Test |
| Fault code | SPN 3482 / FMI 7 |
| Source | www.TruckFaultCodes.com (© 2017) |
| Pages | 1 |
| File size | 0.2 MB |
| Format | |
| Language | English |
FCV failed self test diagnostic guide
The routine directs the technician to replace the hydrocarbon (HC) doser block assembly, following the removal procedure in Power Service Literature, then to connect the diagnostic tool and run the Doser Fuel Line Purge service routine. A parked regeneration is performed afterward to confirm the valve now operates correctly. It is a component-replacement and verification procedure rather than a long circuit test, so the emphasis is on doing the purge and regeneration in order.
Document table of contents
- Fault code identification: SPN 3482, FMI 7
- Fault condition: fuel cutoff valve self-test failure
- Hydrocarbon doser block replacement
- Doser fuel line purge and parked regeneration
Applicable truck models
This procedure applies to Detroit DD Series engines built for EPA 2007 and later, covering all model years (EPA07, EPA10 and GHG14) 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 FCV failed self test manual
A diesel technician on any Detroit DD model year with a failed valve self test uses this sheet to replace the doser block, purge the fuel line and regenerate correctly instead of clearing the code and hoping.
The full 1-page PDF is available in the DiagTechPro manuals library; a free account is required to download.
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