SPN 1761 FMI 4 is the Detroit code raised when the DEF tank level sender circuit has failed low, and this sheet walks the harness and Aftertreatment Control Module (ACM/ACM2.1) checks that isolate it. Follow it before replacing the sender.
Official document details
| Brand | Detroit |
| Model coverage | DD13, DD15, DD16 (EPA 2007-current) |
| System / group | DEF / SCR aftertreatment — level sensor circuit |
| Fault code | SPN 1761 / FMI 4 |
| Publication no. | Not printed on sheet |
| Year / revision | Reference dated 2017 |
| Pages | 1 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Fault header: SPN 1761 / FMI 4 — DEF tank level sensor circuit failed low
- Monitored parameter and verification conditions
- Step 1 — disconnect and inspect the sender connector
- Step 2 — repair short to ground at ACM pin 109
SPN 1761 FMI 4 troubleshooting steps
This is a short one-page procedure. Step 1 disconnects the DEF tank temperature/level sender and Step 2 inspects its connector for bent, spread or corroded pins. If pin damage is found it is repaired; if the connector is clean, the fault is a short to ground between pin 1 of the sender and pin 109 of the Aftertreatment Control Module (ACM), which is repaired directly. The sheet lists the monitored parameter as the DEF tank level sensor, always enabled, with a typical two-second duration and MIL and CEL lamps.
Applicable truck models
This procedure covers Detroit DD-series engines — DD13, DD15 and DD16 on the EPA 2007-current platform with SCR aftertreatment — and shares its SPN/FMI structure with related Series 60 DDEC VI applications. Confirm the emissions calibration (EPA07, EPA10 or GHG14) before probing any pin. For engine serial-number and calibration confirmation, use the Detroit Diesel official support site.
Who needs the SPN 1761 FMI 4 manual
Diesel technicians and aftertreatment specialists use this sheet to test the DEF tank temperature/level sender wiring, distinguish a short or open from a failed sender, and identify the exact ACM pins before ordering parts.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download. Source: Detroit SPN/FMI fault-code reference (© 2017); circuit values are measured with the Detroit Diesel Diagnostic Link (DDDL) and a calibrated multimeter.
Related manuals library
Sản phẩm liên quan cho hãng này
Cùng brand theo taxonomy hiện có trong catalog WooCommerce.
Detroit Diesel Reports 6.3
Detroit Reprogramming Station (DDRS) 7.11
DDDL Backdoor Password: A Comprehensive Guide
