SPN 600 FMI 19 is the Detroit DD Series diagnostic fault-code sheet (SPN 600 / FMI 19) that documents a J1939 cruise control coast switch signal from source #1, #2, or #3 that is erratic. This 1-page PDF, drawn from the Detroit / Detroit Diesel Corporation (DDC) troubleshooting reference (© 2017), gives the workshop the exact measured checks needed to confirm and repair the fault rather than guess at it.
SPN 600 FMI 19 document details
| Brand | Detroit (Detroit Diesel Corporation) |
| Model coverage | DD Series (EPA 2007-Current); Series 60 (DDEC VI, EPA 2007) |
| System / Group | Diagnostic Trouble Codes (DTCs) – SPN 600 / FMI 19 |
| Source | Detroit / DDC diagnostic troubleshooting reference |
| Year / Revision | © 2017 |
| Pages | 1 |
| File size | 0.22 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code definition (SPN 600, FMI 19)
- Multiple-code checks
- CPC and MCM cross-checks
- Troubleshooting steps
- CPC reprogramming verification
- Cruise control coast switch diagnosis
Fault definition and diagnosis
Diagnosis starts by checking for multiple codes: Common Powertrain Controller (CPC) battery-voltage faults (SPN 168) and a Motor Control Module (MCM) SPN 625/FMI 9 that would require troubleshooting and repairing the Controller Area Network line first. If only a J1939 error is present, the technician confirms whether the CPC was recently reprogrammed and follows the coast switch source #1, #2 and #3 checks in the sheet.
Applicable truck models
It applies to Detroit DD Series engines (EPA 2007 to current) and Series 60 (DDEC VI, EPA 2007) vehicles using the J1939 cruise control coast switch inputs. For engine specifications and authorised service information, see the official Detroit engine website.
Who needs the SPN 600 FMI 19 manual
Diesel technicians and workshop owners diagnosing this Detroit DTC with DiagnosticLink or ServiceLink use it to follow the manufacturer sequence step by step, and to confirm the SPN 600 / FMI 19 repair before returning the truck to service.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download it.
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