The Cummins ISM code 1893 service document is a 7-page PDF fault-code sheet that covers the EGR Valve Control Circuit fault (code 1893) on Cummins ISM CM871 engines. It sets out the SPN, FMI and warning-lamp data, a plain-language description of the EGR valve, and the step-by-step checks a technician follows to confirm, repair and clear the fault.
Official document details
| Brand | Cummins |
| Model coverage | ISM CM871 (2007-09) / DTCs; ISX CM871 (2007-09) / DTCs |
| System / group | ISM CM871 (2007-09) / DTCs |
| Fault code | 1893 (PID S324, SPN 3251, FMI 2) |
| Warning lamp | Amber |
| Source | TruckFaultCodes reference, Copyright © 2017 |
| Pages | 7 |
| File size | 0.4 MB |
| Format | |
| Language | English |
Document table of contents
- Description
- Shop Talk
- Component Location
- Troubleshooting Steps
- Circuit Diagram
Applicable truck models
This fault-code sheet applies to Cummins ISM CM871 (2007-09) engines and, where noted in the document, the related ISX CM871 platform used in on-highway trucks fitted with the EGR valve. Verify that the ECM calibration matches the engine before starting diagnosis. Current engine specifications and service policy are published on the Cummins official website.
Cummins ISM code 1893 troubleshooting steps
The exhaust gas recirculation (EGR) valve is a smart device and receives commands from the engine electronic control module (ECM) via the SAE J1939 data link. The EGR valve performs its own internal diagnostics and reports failures back to the primary engine ECM using the SAE J1939 data link. The troubleshooting routine walks through key-on diagnostic-tool checks, inspection of the EGR valve, and verifying that the fault goes inactive after the repair. The sheet reports fault code 1893 with SPN 3251, FMI 2 and an amber lamp so the technician can confirm the right diagnostic tree.
Who needs this Cummins ISM code 1893 manual
Heavy-duty truck technicians and workshop owners diagnosing the EGR valve on Cummins ISM CM871 engines need this reference. It documents the fault code 1893 conditions, likely causes and the checks required to close the repair correctly the first time.
The full PDF is available in the DiagTechPro manuals library — a free account is required to download.
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