This document is a Cummins 2963 fault code troubleshooting PDF for engine coolant temperature above the protection warning limit. It explains the coolant temperature sensor circuit, fault conditions, INSITE™ checks, ECM calibration review, and fault clearing steps for CM2250 engines.
Official Cummins 2963 fault code document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250, with associated coverage for ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX15 CM2250, and other listed Cummins platforms |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Engine Coolant Temperature Sensor Circuit |
| Publication no. | 4022254 for ISB6.7 CM2250 associated procedure reference |
| Year/Revision | Last Modified: 11-Jun-2010; troubleshooting section Last Modified: 30-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 the Fault Codes
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- FAULT CODE 2963 – Engine Coolant Temperature – Data Valid But Above Normal Operating Range – Least Severe Level
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Monitor coolant temperature.
- Guided Step 2 – Check ECM calibration and clear fault codes.
- Guided Step 2B – Disable the fault code.
Applicable truck models
This file applies to Cummins electronic engine platforms listed in the procedure table, including ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX15 CM2250, and ISX11.9 CM2250. The associated procedure table also references ISF2.8 CM2220 E, ISF2.8 CM2220 AN, ISF3.8 CM2220 AN, ISB4.5, ISB6.7, ISD4.5, and ISD6.7 CM2150 SN, ISL8.9 CM2150 SN, ISM11 CM876 SN, and ISZ13 CM2150 for coolant temperature sensor and ECM calibration code procedures. See the manufacturer at Cummins official website.
Who needs this Cummins 2963 fault code manual
Workshop technicians, fleet mechanics, and diagnostic tool users need this manual when a truck reports SPN 110 FMI 0/15 and the coolant temperature value is above 107°C [225°F]. It supports checks with INSITE™ electronic service tool, comparison to a mechanical gauge or known value, coolant temperature sensor replacement reference Procedure 019-019, ECM Calibration Code Procedure 019-032, and fault code clearing after the temperature falls below the stated threshold.
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