This 8-page PDF is a Fault Code 3715 DTCs troubleshooting guide covering the diagnostic and repair procedure for SPN 188 / FMI 16 — Engine Speed At Idle, Data Valid But Below Normal Operating Range, Moderately Severe Level. The document details the conditions that trigger the fault, the ECM response, step-by-step guided diagnostics, and the criteria for clearing the code on ISB6.7 CM2250 and ISX CM2250 engines.
Official Fault Code 3715 DTCs document details
| Brand | Cummins |
| Model coverage | ISB6.7 CM2250 (2010-12), ISX11.9 CM2250, ISX15 CM2250 |
| System / Group | Diagnostic Trouble Codes (DTCs) — Engine Speed at Idle |
| Publication no. | — |
| Year / Revision | Last Modified 11-Jun-2010 |
| 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 Code (SPN 188 / FMI 16)
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk — Possible Causes
- Associated Procedures — ECM Calibration Code (Procedure 019-032)
- Step 1: Check for Active Fault Codes (1A, 1B — fuel system faults)
- Step 2: Check the Engine RPM (2A — crankshaft/camshaft position sensor faults; 2B — INSITE™ RPM verification; 2C — alternate fuel source check)
- Step 3: Check ECM Calibration and Clear Fault Codes (3A — calibration update; 3B — disable and clear fault code)
Applicable truck models
This procedure applies to Cummins ISB6.7 CM2250, ISX11.9 CM2250, and ISX15 CM2250 electronically controlled diesel engines. These powertrains are found in medium- and heavy-duty trucks from manufacturers such as Kenworth, Peterbilt, Freightliner, and International, as well as certain bus and industrial applications from the 2010–2012 model-year range. The ECM monitors engine speed via the crankshaft and camshaft position sensors and sets Fault Code 3715 when idle speed exceeds governed idle by 50 rpm for 30 seconds. For additional technical resources visit the official Cummins website.
Who needs this Fault Code 3715 DTCs manual
Diesel mechanics and workshop owners diagnosing an amber CHECK ENGINE or MIL lamp triggered by an idle-speed overshoot on CM2250-governed engines will find the guided steps, INSITE™ service tool procedures, and sensor cross-references essential for efficient repair.
The full PDF is available in the DiagTechPro manuals library; a free account is 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
