This fault code 2963 DTCs document is a diagnostic procedure for an engine coolant temperature fault on CM2150 engines. It explains the coolant temperature sensor circuit, the conditions that set the code, ECM response, clearing logic, and the first troubleshooting step using INSITE™ electronic service tool.
Official fault code 2963 DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150 (2007-09); extract also references ISB, ISC, ISL, ISBe, ISDe, B3.3, QSB3.3, and ISLe CM2150 service manuals |
| System/Group | DTCs; ISB, ISC, and ISL – Engine Coolant Temperature Sensor Circuit |
| Publication no. | Not stated for this PDF; referenced manuals include Bulletin 4021578, 4021597, 4021540, 4021569, and 4021630 |
| Year/Revision | Last Modified: 20-Jul-2010 |
| Pages | 4 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- FAULT CODE 2963
- 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 for sensor circuit fault codes.
- Guided Step 1A – Check for Fault Codes 144 and 145.
Applicable truck models
This file applies to Cummins ISB6.7 CM2150 (2007-09) coverage and discusses the engine coolant temperature sensor circuit used by the ECM to monitor coolant temperature from a 5-volt signal circuit. The extract also names ISB, ISC, and ISL engines and points technicians to CM2150 service manuals for ISB CM2100 and CM2150, ISBe and ISDe CM2150, B3.3 and QSB3.3 CM2150, ISC and ISL CM2150, and ISLe CM2150 when the Engine Coolant Temperature Above Normal symptom tree is needed. For manufacturer information, visit the Cummins official website.
Who needs this fault code 2963 DTCs manual
Workshop owners, diesel mechanics, and fleet diagnostic technicians need this manual when a Cummins ECM logs SPN 110 FMI 0/15 with coolant temperature above the engine protection warning limit. It is also useful before replacing parts, because the first guided check asks whether Fault Codes 144 and 145 are active and directs the repair path accordingly.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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