This document is a Cummins 3492 troubleshooting manual for Fault Code 3492 on CM2250 engine control systems. It covers the real time clock abnormal rate of change fault, the ECM-based engine off timer, INSITE™ checks, calibration review, and fault clearing. The file is an 8-page PDF intended for diagnostic reference during shop repair work.
Official Cummins 3492 troubleshooting document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; extract also lists ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, QSL9 CM2250, QSB6.7 CM2250, GX CM2250, and selected CM2150 engines in associated procedures. |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Engine Control Module (ECM) |
| Publication no. | 4022254 for ISB6.7 CM2250 associated procedures; other bulletin numbers appear for other engine models. |
| Year/Revision | Last Modified: 11-Jun-2010 and 08-Dec-2010; file year unknown. |
| Pages | 8 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- Conditions for Setting the Fault Codes
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check the fault codes.
- Guided Step 2 – Verify fault condition and check ECM calibration.
- Guided Step 3 – Check ECM calibration and clear fault codes.
Applicable truck models
This Cummins fault document is centered on Fault Code 3492, SPN 251 FMI 10, for the real time clock inside the electronic control module. The file information identifies ISB6.7 CM2250 coverage, while the document extract also references ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, QSL9 CM2250, QSB6.7 CM2250, and associated CM2150 engine procedures. It describes a stuck or inaccurate engine off timer, an amber CHECK ENGINE lamp or MIL response, and no stated effect on engine performance. For manufacturer information, visit Cummins official website.
Who needs this Cummins 3492 troubleshooting manual
Workshop owners, diesel mechanics, and fleet technicians need this file when INSITE™ electronic service tool shows Fault Code 3492 active or inactive and the repair path requires ECM calibration review. It is also useful when confirming whether Fault Code 111 is active, checking ECM code and revision number, or validating the repair with a key OFF for 1 minute and key ON for 15 minutes.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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