SPN 511403 FMI 9 is the Detroit Diesel fault-code service sheet that documents a generator (charging system) terminal W allocation error on the pulse/rev signal. It combines the standard J1939 code checks with a charging-system inspection of the alternator and battery. This DiagTechPro library page summarizes what the 2-page PDF contains so a technician can confirm it is the right document before downloading.
Official document details
| Brand | Detroit (Detroit Diesel) |
|---|---|
| Model coverage | DD Series (EPA 2007-Current); Series 60 DDEC VI (EPA 2007) |
| System / group | GHG14 diagnostic trouble codes |
| Suspect Parameter Number | 511403 |
| Failure Mode Identifier | 9 |
| Source | TruckFaultCodes.com, © 2017 |
| Pages | 2 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Step 1: connect the diesel diagnostic tool
- Step 2: check CPC4 SPN 168 and SPN 625 CAN faults
- Steps 4-7: alternator belt, mounting, operation, battery
- Steps 8-10: power-down and re-check sequence
- Escalation: OEM wiring-schematic material
SPN 511403 FMI 9 diagnostic summary
After connecting the diesel diagnostic tool, the technician checks for multiple codes: any CPC4 SPN 168/FMI battery-voltage faults and any SPN 625 Controller Area Network (CAN) line faults are addressed first. If only this charging-system code is present, the sheet steps through the alternator drive belt, alternator mounting, alternator operation and battery condition, replacing or repairing each as required. When the fault stays inactive the codes are cleared; if it remains, the technician is directed to Original Equipment Manufacturer (OEM) wiring-schematic material or further powertrain-CAN troubleshooting.
Applicable Detroit truck models
This fault-code sheet applies to Detroit DD Series engines certified to EPA 2007 and later emissions standards, and it is cross-listed under the Detroit Series 60 (DDEC VI, EPA 2007) diagnostic set. For full engine specifications and support details, see the official Detroit website.
Who needs this SPN 511403 FMI 9 manual
Detroit technicians chasing a charging-system or terminal-signal complaint use this sheet to test the belt, alternator and battery in order before escalating to OEM wiring diagnosis.
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