SPN 5418 FMI 4 is the Detroit DD Series fault code for a Quantity Control Valve Low Side Error, and this two-page sheet lays out the description and troubleshooting steps. Published on TruckFaultCodes.com (Copyright 2017), it points to an MCM2.1 pin 2 circuit shorted to power or an internal short of the quantity control valve.
Official document details
| Brand | Detroit |
| Model coverage | DD13, DD15, DD16 (DD Series, EPA 2007-Current) and Series 60 DDEC VI |
| System/Group | DD Series (EPA 2007-Current) / DTCs |
| Fault code | SPN undefined FMI undefined |
| Source | TruckFaultCodes.com, Copyright 2017 |
| Pages | 2 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code description (SPN and FMI)
- Monitored parameter and enabling conditions
- Dash lamps (MIL, CEL) and 25% derate
- Conditions that set the code
- Troubleshooting steps 1 to 6
Applicable truck models
This sheet covers Detroit DD13, DD15 and DD16 engines in the DD Series (EPA 2007-Current) range, and the same code is cross-referenced on the Series 60 DDEC VI platform running a Three-Filter fuel system. For OEM-level service literature and engine coverage, see the official Detroit Diesel website.
SPN 5418 FMI 4 resistance and voltage test
After disconnecting the quantity control valve harness and zeroing the DVOM, resistance across pins 1 and 2 below 1.3 Ω condemns the valve, replaced with the Removal of the Quantity Control Valve — Three-Filter System procedure in Power Service Literature. A reading between 1.3 Ω and 1.4 Ω sends you to inspect the 120-pin MCM2.1 connector, then with ignition ON measure the voltage at pin 2: 0 volts means replacing the MCM2.1, while any voltage above 0 means repairing the short to battery. The code drives a 25% derate with MIL and CEL lit.
Who needs this SPN 5418 FMI 4 manual
DD Series technicians seeing a fuel-system derate turn to this 5418 FMI 4 manual to tell a harness short to power apart from an internally failed valve or a faulty MCM2.1.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download.
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