Coolant Temperature Sensor — Checking Functionality and Replacement (Chevrolet Trailblazer 1)

1. The coolant temperature control system consists of an indicator (or emergency lamp), which is located on the instrument panel, and a sensor installed on the engine. On the vehicles described, the coolant temperature sensor is an information sensor for the fuel and exhaust system (see chapter 6), as well as a device for determining the temperature of the coolant.

2. When the engine overheat indicator is triggered, check the coolant level in the system and then make sure that the circuit connectors between the temperature sensor and the indicator are secure.

3. Check the functionality of the sensor (see chapter 6). If the sensor is not working, replace it as described in this chapter.

4. If the temperature sensor is in good condition, carry out diagnostics of the measuring unit at a branded or other specialized station. To perform diagnostics, an electronic scanner is required, since the sensor is directly connected to the operation of the microprocessor of the RCM control system.

(The original article is on the website: ChevyMan.ru)