This SPN 51 FMI 10 reference covers the Detroit DD Series intake throttle valve abnormal rate-of-change fault on the GHG14 platform. It is part of the DiagTechPro truck manuals library and preserves the original TruckFaultCodes.com Detroit fault-code library (Copyright 2017).
Official document details
| Brand | Detroit |
|---|---|
| Model coverage | Detroit DD Series (EPA 2007-current) engines; the same fault-code procedure is also filed under the Detroit Series 60 (DDEC VI, EPA 2007) group. |
| System / Group | DD Series (EPA 2007-Current) / DTCs |
| Fault code | SPN 51 / FMI 10 |
| Source | TruckFaultCodes.com Detroit fault-code library (Copyright 2017) |
| Pages | 3 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Fault description and enabling conditions
- Valve icing note
- ITV commanded-position tests
- ITV motor resistance and replacement
Diagnostic steps in the SPN 51 FMI 10 document
The document warns the code can set falsely in extreme cold from valve icing, then commands the Intake Throttle Valve (ITV) to 20, 50 and 90 percent and checks the actual position falls within tolerance. If it does not, the harness connector is inspected for bent or corroded pins and ITV motor resistance is measured between pins 4 and 5; above 10 ohms the valve is replaced.
The Intake throttle position abnormal rate of change condition on Detroit DD Series trucks is read and cleared with DiagnosticLink (formerly DDDL); the SPN and FMI pair identifies the exact circuit and failure mode. Confirm the code is active and capture freeze-frame data before running the pinpoint tests, then clear it and road-test the truck to verify the repair has held.
Applicable truck models and engines
This document applies to Detroit DD Series (EPA 2007-current) engines; the same fault-code procedure is also filed under the Detroit Series 60 (DDEC VI, EPA 2007) group. For factory service data, parts and warranty information, consult Detroit’s official DD engine support.
Who needs the SPN 51 FMI 10 manual
It helps DD Series technicians separate a genuine throttle-actuator fault from cold-weather valve icing before replacing the ITV.
The complete PDF is available in the DiagTechPro manuals library; a free account is required to download it.
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