The Cummins fault code 195 troubleshooting manual is the official Cummins procedure for diagnosing Coolant Level Sensor 1 Circuit – Voltage Above Normal or Shorted to High Source. The electronic control module (ECM) provides a 5 volt supply to the engine coolant level sensor using a common sensor supply circuit. The ECM also provides a ground on the sensor return circuit. The engine coolant level sensor provides a signal to the ECM on the engine coolant level sensor signal circuit. This sensor signal voltage changes based on the coolant level in the expansion tank. The amber warning lamp behaviour, the exact conditions that set and clear the code, and the guided steps that isolate the Coolant Level Sensor 1 Circuit are documented in order.
Cummins fault code 195 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 | 195 — SPN 111, FMI 3/3 |
| PID | P111 |
| Warning lamp | Amber |
| Year / Revision | 2010-12 (CM2250) |
| Pages | 15 |
| File size | 0.3 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 Sensor 1 Circuit 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 195 manual
Diesel technicians and workshop owners servicing Cummins CM2250 platform engines use this file to work SPN 111, FMI 3/3 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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