The Cummins fault code 197 troubleshooting manual is the official Cummins procedure for diagnosing Coolant Level – Data Valid But Below Normal Operational Range – Moderately Severe Level. The coolant level sensor is a switch and is used to measure the level of the engine coolant in the radiator top tank. The coolant level sensor is immersed in the coolant and returns a different signal voltage when immersed in coolant versus being out of the coolant. The Electronic Control Module (ECM) monitors the change in voltage caused by changes in the resistance of the sensor to determine the level of the engine coolant. The amber warning lamp behaviour, the exact conditions that set and clear the code, and the guided steps that isolate the Coolant Level are documented in order.
Cummins fault code 197 document details
| Brand | Cummins |
|---|---|
| Model coverage | Cummins ISX11.9 CM2250 (2010-12), ISX12 CM2250 (2010-12) engines |
| System / Group | ISX11.9 CM2250 (2010-12) / DTCs |
| Fault code | 197 — SPN 111, FMI 1/18 |
| PID | P2560 |
| Warning lamp | Amber |
| Year / Revision | 2010-12 (CM2250) |
| Pages | 6 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview and Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- Conditions for Setting the Fault Codes
- Action Taken When the Fault Code is Active
- Associated Procedures and Troubleshooting Steps
- Guided circuit-response and connector checks
- Conditions for Clearing the Fault Code
Applicable truck models covered
This document applies to Cummins ISX11.9 CM2250 (2010-12), ISX12 CM2250 (2010-12) engines, within the shared Cummins CM2250 platform diagnostics. The guided steps rely on the Cummins INSITE electronic service tool to read active fault codes, monitor sensor data and confirm the repair once the Coolant Level has been serviced. Always confirm engine and calibration coverage against the official Cummins engine support site before ordering parts.
Who needs this Cummins fault code 197 manual
Diesel technicians and workshop owners servicing Cummins CM2250 platform engines use this file to work SPN 111, FMI 1/18 in the correct order instead of guessing at parts. It lists every conditions block, associated procedure and guided circuit-response check, with the connector and harness inspection points and the specification each step expects. Following the troubleshooting steps in sequence keeps the repair accountable and lets the technician confirm the fault is inactive once verified with the Cummins INSITE electronic service tool.
The full PDF, including the complete guided troubleshooting tree and specifications, is available in the DiagTechPro manuals library; a free account is required to download it.
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