This Cummins fault code 196 document is a 29-page diagnostic PDF for the engine coolant level sensor circuit on Cummins ISB6.7 CM2150 applications. It explains two-wire and three-wire sensor paths, fault conditions, connector checks, OEM harness tests, and INSITE service tool verification steps. The file is listed as Code 196.pdf and was last modified in the source extract on 20-Jul-2010.
Official Cummins fault code 196 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150 (2007-09); extract also references ISB, ISC and ISL with CM2150 |
| System/Group | DTCs; Engine Coolant Level Sensor 1 Circuit |
| Publication no. | 08-fc196 |
| Year/Revision | Last Modified: 20-Jul-2010; opening page also shows 03-Dec-2008 |
| Pages | 29 |
| File size | 0.6 MB |
| Format | |
| Language | English |
Document table of contents
- Fault Code Path Selection
- 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
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check the fault codes
- Guided Step 2 – Check the engine coolant level sensor and circuit
- Guided Step 3 – Check the OEM harness
- Guided Step 4 – Clear the fault codes
Applicable truck models
This procedure covers Cummins ISB6.7 CM2150 engines from the 2007-09 group and references ISB, ISC and ISL with CM2150 for the engine coolant level sensor 1 circuit. The document does not list truck makes or chassis models; sensor location is described as typically in the radiator top tank or surge tank, with final location to be checked in the OEM troubleshooting and repair manual. For brand background and official service resources, visit Cummins.
Who needs this Cummins fault code 196 manual
Workshop owners, diesel mechanics, and electrical diagnostic technicians need this manual when an amber CHECK ENGINE light is linked to Coolant Level Sensor 1 Circuit voltage below normal or shorted to a low source. It is also useful when confirming whether the fault path is for a two-wire sensor or a three-wire sensor.
The diagnostic content describes ECM supply voltage, sensor resistance behavior, fault setting thresholds, and the loss of low-coolant engine protection when the code is active. For two-wire sensor troubleshooting, the steps check active and inactive codes, inspect sensor connector pins, verify circuit response, and test the OEM harness for pin-to-pin and pin-to-ground shorts. For three-wire sensor troubleshooting, the steps include sensor supply fault checks, 4.75 to 5.25-VDC supply and return verification, circuit response checks, open circuit resistance checks, and possible ECM replacement authorization after other repairs are eliminated.
Referenced service actions include using INSITE™ electronic service tool, checking ECM calibration on QuickServe® Online, cleaning or repairing damaged connectors, repairing or replacing the OEM wiring harness, disabling the fault code, and clearing inactive fault codes after repair. The full PDF is available in the DiagTechPro manuals library, free account required to download.
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