The Detroit engine speed signal fault-code sheet is a Detroit DD Series (EPA 2007-Current) troubleshooting document for an engine-speed signal that is not available over the Controller Area Network. It reproduces the official fault identification, the monitored parameters or service notes printed on the document, and the recommended diagnostic actions a heavy-duty technician follows step by step.
Detroit engine speed signal document details
| Brand | Detroit |
| Model coverage | Detroit DD Series engines (DD13, DD15 and DD16) from EPA 2007-Current, with equivalent coverage noted for Series 60 (DDEC VI) applications. |
| System / Group | DD Series (EPA 2007-Current) / DTCs |
| Publication no. | Not printed on document; sourced from Detroit Power Service Literature |
| Year / Revision | © 2017 |
| Pages | 1 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification — SPN 190 / FMI 9
- Reprogramming check (ACM, MCM, CPC)
- Module power-down and re-check
- Escalation to CPC SPN 625 FMI 9 procedure
Applicable truck models
Detroit DD Series engines (DD13, DD15 and DD16) from EPA 2007-Current, with equivalent coverage noted for Series 60 (DDEC VI) applications. Fault code SPN 190 / FMI 9 is diagnosed with a diesel diagnostic tool such as DDDL or DDRS. For factory procedures and the latest module software, see the Detroit Diesel official website.
Diagnostic steps and checks
The routine first asks whether the Aftertreatment Control Module, Motor Control Module or Common Powertrain Controller was recently reprogrammed; if so, clearing the codes and releasing the vehicle is enough when they do not reactivate. Otherwise the technician keys off, disconnects the diagnostic tool and waits five minutes for the modules to power down, keys back on, reconnects the diesel diagnostic tool, and if the codes are still active follows the full 2010 CPC SPN 625/FMI 9 PT-CAN procedure.
Who needs this Detroit engine speed signal manual
This troubleshooting sheet suits Detroit-certified technicians and independent heavy-duty workshops that read SPN 190/FMI 9 on a scan tool and want the factory decision tree, pin references and component checks before replacing parts.
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