This Cummins coolant level fault document is a 6-page troubleshooting PDF for Fault Code 197 on CM2250 engines. It explains the coolant level sensor circuit, fault conditions, ECM actions, clearing conditions, associated procedures, and INSITE™ guided diagnostic steps.
Official Cummins coolant level fault document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, ISX11.9 CM2250, QSL9 CM2250, QSB6.7 CM2250 |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Engine Coolant Level Sensor Circuit |
| Publication no. | Not stated in the extract; related bulletin numbers include 4022254, 4022257, 4022250, 2883445, 4022256, and 4022255 |
| Year/Revision | Last Modified: 11-Jun-2010; troubleshooting section Last Modified: 03-Jan-2011 |
| Pages | 6 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- FAULT CODE 197
- 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 1A – Check for Fault Code 197.
- Guided Step 2 – Check ECM calibration and clear fault codes.
- Guided Step 2A – Check if an ECM calibration update is available.
- Guided Step 2B – Disable the fault code.
Applicable truck models
This file applies to Cummins CM2250 engine families listed in the procedure table: ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, ISX11.9 CM2250, QSL9 CM2250, and QSB6.7 CM2250. The extract identifies the coolant level sensor as a switch typically located in the radiator top tank or surge tank, with final sensor location referred to the OEM service manual. For official manufacturer information, visit Cummins official website.
Who needs this Cummins coolant level fault manual
This manual is useful for mechanics, fleet technicians, and workshop owners diagnosing Fault Code 197, SPN 111, FMI 1/18, where the ECM detects low engine coolant level or a coolant level sensor signal above 3-VDC for more than 30 seconds. It supports checks for coolant loss, connector coolant contamination, sensor replacement decisions, ECM calibration revision review, and clearing faults with INSITE™ electronic service tool.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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