This Cummins 3724 EGR valve troubleshooting document provides the complete diagnostic and repair procedure for Fault Code 3724 — Battery 1 Voltage Data Valid But Below Normal Operating Range — on CM2250-controlled engines. It details circuit descriptions, conditions for setting and clearing the fault, guided troubleshooting steps, and ECM replacement authorization procedures across seven pages.
Official Cummins 3724 EGR valve document details
| Brand | Cummins |
| Model coverage | ISB6.7 CM2250, ISC8.3 CM2250, ISL9 CM2250, ISX11.9 CM2250, ISX15 CM2250, QSB6.7 CM2250, QSL9 CM2250, GX CM2250 |
| System / Group | Diagnostic Trouble Codes (DTCs) — EGR Valve Device Driver |
| Publication no. | — |
| Year / Revision | Last modified 28-Dec-2010 |
| Pages | 7 |
| 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 Fault Code 3724 (PID P168 / SPN 168 / FMI 17)
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Associated Procedures Table (Procedure 019-031, Procedure 019-032)
- Guided Step 1 — Check the Fault Codes / Check the ECM
- Guided Step 1B — Check Inactive Counts of Fault Code 3724
- Guided Step 2A — Check if an ECM Calibration Update is Available
- Guided Step 2B — Disable the Fault Code
Applicable truck models
Fault Code 3724 applies to all Cummins CM2250-platform engines installed in medium- and heavy-duty trucks. Specific engine families listed are the ISB6.7, ISC8.3, ISL9, ISX11.9, ISX15, QSB6.7, QSL9, and GX CM2250. The associated bulletin numbers referenced include 4022254 (ISB6.7), 4022257 (ISC8.3/ISL9), 4022250 (ISX15/GX), 2883445 (ISX11.9), 4022256 (QSL9), and 4022255 (QSB6.7). For official Cummins technical resources, visit Cummins official website.
Who needs this Cummins 3724 EGR valve manual
Diesel mechanics and workshop owners diagnosing an amber CHECK ENGINE or MIL lamp triggered by low voltage at the EGR valve device driver on any CM2250 engine need this guide. It walks through ECM fault verification, inactive count checks, calibration revision comparison via INSITE™ electronic service tool, and the authorization process for ECM replacement.
When Fault Code 3724 is active, the ECM disables EGR valve actuation and defaults the valve to the closed position. The guided steps first confirm whether the code is still active after an engine restart, then check inactive occurrence counts. If counts exceed three, ECM replacement authorization is required per Procedure 019-031. A calibration update check via Procedure 019-032 follows before final fault clearing. Repair validation requires starting the engine and idling for one minute.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
Related manuals library
Sản phẩm liên quan cho hãng này
Cùng brand theo taxonomy hiện có trong catalog WooCommerce.
Cummins INSITE 9.3 – The Essential Diagnostic Tool for Cummins Engines
Cummins Calterm Version 5.16 – Advanced ECM Control and Precision Tuning for Cummins Engines
Cummins InCal CE – The Calibration and Configuration Tool for Cummins Engines
