SPN 2623 FMI 14 is the Detroit DD-Series diagnostic fault code document for the PWM accelerator pedal J1939 GAS1 and GAS2 signals are missing event, published on TruckFaultCodes.com (copyright 2017) and archived as a 1-page PDF in the DiagTechPro library. The document covers missing J1939 GAS1 and GAS2 accelerator pedal signals, starting with a check for related battery-voltage and CAN-line faults before the pedal itself is suspected.
SPN 2623 FMI 14 document details
| Brand | Detroit |
| Model coverage | Detroit DD-Series (DD13, DD15 and DD16), EPA 2007 and later |
| System / group | DD Series (EPA 2007-Current) / DTCs |
| Fault code (SPN) | 2623 |
| Failure mode (FMI) | 14 |
| Emissions calibration | All model years |
| Source | TruckFaultCodes.com (copyright 2017) |
| Pages | 1 |
| File size | 0.23 MB |
| Format | |
| Language | English |
The page records the official identifiers so a technician can confirm the exact code and calibration against the diesel diagnostic tool before starting any repair.
Document table of contents
- Fault code identification (SPN 2623 / FMI 14)
- GAS1 and GAS2 signals missing description
- Step 1 – Check for multiple codes (SPN 168, SPN 625/FMI 9)
- Controller Area Network (CAN) line repair
- Step 2 – CPC reprogramming check
- ServiceLink module configuration
The procedure first checks for multiple codes: Common Powertrain Controller battery-voltage faults on SPN 168, and Motor Control Module SPN 625/FMI 9, which points to a Controller Area Network line problem. If only the J1939 error is present, the technician then confirms whether the CPC has been recently reprogrammed and checks its configuration. Where the configuration is correct, ServiceLink is connected to determine which modules are configured for the vehicle and their communication status, so the correct module troubleshooting procedure can be followed.
Applicable truck models
This document applies to Detroit DD-Series diesel engines in the EPA 2007-and-later range, typically the DD13, DD15 and DD16 as covered by the All model years calibration shown on the file. Confirm the engine calibration and connector layout for your chassis on the official Detroit engine site before ordering parts.
Who needs this SPN 2623 FMI 14 manual
Technicians diagnosing a dead or erratic accelerator pedal on a Detroit DD-Series truck will use this page to separate a network fault from a pedal or configuration problem.
The complete 1-page PDF is available in the DiagTechPro manuals library, where a free account is required to download it.
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