Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1993CAPRICE WAGON RWD V8-350 5.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSCOOLANT TEMPERATURE SENSOR/SWITCH (FOR COMPUTER)DESCRIPTION AND OPERATION
1993 Chevrolet Caprice Wagon RWD V8-350 5.7L
Coolant Temperature Sensor/Switch (For Computer): Description and Operation
1993 Chevrolet Caprice Wagon RWD V8-350 5.7LSECTION Description and Operation
Coolant Temperature Sensor (CTS):
The engine coolant temperature sensor is a thermistor that is located in the engine coolant flow. When the coolant temperature is low, the sensor produces a high resistance. When the coolant temperature is high, the sensor produces a low resistance.
The computer sends a 5.0 volt signal to the coolant temperature sensor through a resistor in the ECM and measures the voltage. The voltage will be high or low depending on coolant temperature. By varying the voltage, the computer will sense engine coolant temperature.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.