SPN 91 FMI 14 is the Detroit fault code for a fault of pedal not learned on the DD Series accelerator pedal circuit. This 2-page reference from the DiagTechPro library reproduces the official Detroit troubleshooting steps so a technician can work the fault in the correct order. It is a factory-style diagnostic guide, not a repair shortcut.
Official document details
| Brand | Detroit (Detroit Diesel) |
| Model coverage | DD13, DD15, DD16 – DD Series (EPA 2007–current) |
| System / Group | DD Series (EPA 2007-Current) / DTCs |
| Suspect Parameter Number | 91 |
| Failure Mode Identifier | 14 |
| Description | Fault of Pedal Not Learned |
| Coverage / Revision | GHG14 |
| Pages | 2 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification and description
- Accelerator Pedal (AP) harness voltage checks
- Common Powertrain Controller (CPC) circuit checks
- AP resistance and continuity checks
- Clearing codes and verifying the repair
SPN 91 FMI 14 diagnostic overview
SPN 91 FMI 14 covers a pedal-not-learned condition on the two-channel accelerator pedal. The procedure has the technician disconnect the AP, measure supply voltage between pins B and C and between pins D and E (both expected at 4.5 to 5.5 volts), then check the open circuit back to the CPC4 #1 connector and the pin A to pin 7 resistance before replacing the pedal. Each step is written as a yes or no decision, so the result of one measurement points directly to the next check or to the final repair action.
Applicable truck models and engines
It applies to Detroit DD13, DD15 and DD16 engines in the DD Series (EPA 2007 to current) family, and the library also carries the matching guide for the Series 60 (DDEC VI) platform. For factory support tools and warranty information, see Demand Detroit official resources.
Who needs this 91 FMI 14 manual
This document is intended for Detroit DD Series technicians who need a pin-by-pin voltage and resistance sequence to decide whether the accelerator pedal or its harness is at fault.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download it, view every page, and print the decision steps for use at the workshop bench.
Related manuals library
Sản phẩm liên quan cho hãng này
Cùng brand theo taxonomy hiện có trong catalog WooCommerce.
Detroit Diesel Reports 6.3
Detroit Reprogramming Station (DDRS) 7.11
DDDL Backdoor Password: A Comprehensive Guide
