Cummins ISM Code 293 is the official Cummins fault code troubleshooting PDF that documents the oem temperature sensor circuit on ISM CM570 (1999-02) engines. This 6-page reference from the Cummins service literature explains the circuit, the likely causes behind the yellow warning lamp, and the step-by-step checks a technician follows to confirm the repair.
Official document details
| Brand | Cummins |
|---|---|
| Model coverage | ISM CM570, ISX CM570 and Signature CM570 (1999-02) |
| System / Group | Oem Temperature Sensor Circuit (DTCs) |
| Fault code | Code 293 · PID S154 · SPN 1083 · FMI 3/3 |
| Warning lamp | Yellow |
| Year / Revision | Copyright 2017 |
| Pages | 6 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Circuit description
- Component location
- Shop talk – possible causes
- Troubleshooting steps
- Fault code verification and clearing
Cummins ISM Code 293 troubleshooting summary
The OEM sensor signal is used by the ECM to monitor the OEM temperature. The OEM temperature is used by the ECM for the engine protection system. The location varies with the OEM. The manual walks through 11 labelled troubleshooting steps that inspect connectors and pins, measure circuit resistance, and verify the fault code is inactive after the repair.
The resistance of all temperature sensors varies with the
temperature.
Referenced Cummins service tools and part numbers: 3824510.
Applicable truck models
This procedure applies to Cummins ISM CM570, ISX CM570 and Signature CM570 engines built in the 1999-02 range, as used in Class 8 highway trucks. Always confirm the exact engine dataplate before servicing. Full engine specifications and dealer support are available on the Cummins official website.
Who needs this Cummins ISM Code 293 manual
Heavy-duty diesel technicians, fleet service managers and independent workshop owners diagnosing a Code 293 on the oem temperature sensor circuit rely on this document to follow the manufacturer procedure instead of guessing at parts. Because Code 293 shares its troubleshooting logic with the ISX CM570 and Signature CM570 platforms, a single PDF supports several Cummins engine families in the same workshop.
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