Detroit SPN 3471 low Service Manual PDF 1 Pages

This Detroit SPN 3471 low troubleshooting sheet documents fault code SPN 3471/FMI 4, HC Doser Circuit Failed Low, on Detroit DD Series engines. It isolates a short to ground on the Electronic Dosing Valve (EDV) harness with resistance measurements. The monitored parameter is the HC doser circuit, carrying a 25% derate.

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 3471 / FMI 4
Emission tier	All years
Publication no.	Detroit Power Service Literature (via TruckFaultCodes.com, © 2017)
Pages	1
File size	0.2 MB
Format	PDF
Language	English

Detroit SPN 3471 low table of contents

Fault code identification: SPN 3471, FMI 4
Description: HC doser circuit, MIL/CEL lamps and 25% derate
Steps 1-2: disconnect EDV sensor and MCM 120-pin connector
Step 3: pin 1 EDV harness resistance to ground (5 ohm limit)
Step 4: pin 2 EDV harness resistance to ground
Decision: repair short circuit or replace the EDV

Applicable truck models

This procedure applies to Detroit DD Series diesel engines and checks the EDV sensor harness pins 1 and 2 for a short to the battery ground lug by the starter. A reading under 5 ohms indicates a harness short rather than a valve failure. See Detroit’s official service literature portal for the authoritative Detroit repair procedures.

Who needs this Detroit SPN 3471 low manual

Technicians who read SPN 3471/FMI 4 will use this single-page sheet to confirm a low (shorted) HC doser circuit before condemning the EDV. It suits workshop owners who want a fast, measurement-based decision.

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.