This Detroit H bridge ground troubleshooting sheet documents fault code SPN 3464/FMI 4, H-Bridge 1 Circuit Shorted to Ground, on Detroit DD Series engines. The one-page document records the fault definition, monitored parameter and engine reaction for the intake throttle valve driver. It is a concise reference for identifying the short.
Official document details
| Brand | Detroit |
|---|---|
| Model coverage | DD Series diesel engines (DD13, DD15, DD16), EPA 2007 and newer |
| System / Group | DD Series (EPA 2007-Current) / DTCs |
| Fault code | SPN 3464 / FMI 4 |
| Emission tier | EPA10 / GHG14 |
| Publication no. | Detroit Power Service Literature (via TruckFaultCodes.com, © 2017) |
| Pages | 1 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Detroit H bridge ground table of contents
- Fault code identification: SPN 3464, FMI 4
- Fault name: H-Bridge 1 Circuit Shorted to Ground
- Monitored parameter: intake throttle valve
- Dash lamps (MIL, CEL) and 10% derate
- Enabling conditions: key on, engine off
Applicable truck models
This document applies to Detroit DD Series diesel engines certified to EPA10 and GHG14 standards, covering the H-bridge 1 driver circuit that controls the intake throttle valve. The code sets when that circuit shorts to ground. See Detroit’s official service literature portal for the authoritative Detroit repair procedures.
Who needs this Detroit H bridge ground manual
Technicians who read SPN 3464/FMI 4 will use this sheet to confirm the definition of an H-bridge circuit shorted to ground before circuit testing. It suits workshop owners logging the fault for Detroit repairs.
The full PDF is available in the DiagTechPro manuals library — a free account is required to download. It is offered for reference alongside your Detroit diesel diagnostic tool. DiagTechPro catalogues Detroit fault-code documents so technicians can locate the exact SPN and FMI they are chasing without paging through a full engine service manual. Each entry lists the page count, file size and emission tier up front, and links to the closely related codes shown below so a diagnosis can move quickly from one fault to the next.
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