The Cummins fault code 3374 troubleshooting document is a 2-page factory diagnostic reference for the Cummins ISM and ISX CM871 (2007-09) engine platform, covering ABS SAE J1939 brake control (SPN 1818, FMI 31/11). This is an information-only fault code. This page summarises what the manual contains so a technician can confirm it matches the code before downloading.
Official document details
| Brand | Cummins |
| Model coverage | ISM & ISX CM871 (2007-09) |
| System / group | ISM CM871 (2007-09) / DTCs |
| Circuit | ISX and ISM SAE J1939 Multiplexing Circuit / Anti-lock Braking (ABS) Controller |
| Fault identifiers | SPN 1818 · FMI 31/11 |
| Source | TruckFaultCodes.com (© 2017) |
| Pages | 2 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Cummins fault code 3374 overview
This is an information-only fault code. Certain anti-lock braking (ABS) controllers communicate with the electronic control module (ECM) over the SAE J1939 data link, and under some driving conditions the ABS controller sends a cruise-control inhibit message so cruise control is temporarily disabled. Verify the ECM calibration is correct; no mechanical repair is required.
The document lists possible causes including:
- An ABS controller inhibit message sent over the SAE J1939 data link
- Certain driving conditions detected by the anti-lock braking controller
- Cruise control temporarily disabled — information only, no failure
Document table of contents
- Description
- Shop Talk
- Component Location
- Troubleshooting Steps
Applicable truck models covered
This procedure applies to Cummins ISM and ISX engines built on the CM871 (2007-09) electronic control platform, as fitted by truck makers using this Cummins driveline. The ECM is on the fuel-system side of the engine; the SAE J1939 data link wiring and ABS controller location vary by OEM. For wiring, connector, and CPL detail, refer to the Cummins official engine support site or the OEM service manual.
Who needs this Cummins fault code 3374 manual
Fleet technicians and workshop owners diagnosing a temporary cruise-control inhibit on ISM or ISX CM871 engines use this reference to follow the factory step order instead of guessing at the anti-lock braking circuit. The full PDF is available in the DiagTechPro manuals library, and a free account is required to download.
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