Coolant Temperature Sensor - Test
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Personal injury can result from escaping fluid under pressure. If a pressure indication is shown on the indicator, push the release valve in order to relieve pressure before removing any hose from the radiator. |
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| Tools Needed | Quantity | |
| 348-5430 | Multi-Tool Gp | 1 |
| 274-8062 | Connector Fitting | 1 |
| 5P-4674 | O-Ring Adapter | 1 |
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| Illustration 1 | g02961256 |
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Test location (1) Plug | |
If you suspect that the coolant temperature sensor is inaccurate, perform the following procedure:
Note: Ensure that the coolant level is at the correct level before performing this test.
- Remove plug (1).
- Install the 348-5430 Multi-Tool Gp.
- Connect the Caterpillar Electronic Technician (ET) to the service tool connector. Start Cat ET.
- Start and run the engine until the temperature reaches the desired range according to the test thermometer.
- Monitor the coolant temperature on Cat ET. Monitor the coolant temperature on the test thermometer.
- Compare the coolant temperature on Cat ET to the coolant temperature on the test thermometer. If the two measurements are comparable, the sensor is okay. If the two measurements are not comparable, there may be a problem with the sensor. Install a new sensor and verify that the problem is resolved.
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