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 MANUALSCHRYSLER1999CIRRUS L4-2.4L VIN XREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSSENSORS AND SWITCHES - COMPUTERS AND CONTROL SYSTEMSCOOLANT TEMPERATURE SENSOR/SWITCH (FOR COMPUTER)DESCRIPTION AND OPERATION
1999 Chrysler Cirrus L4-2.4L VIN X
Coolant Temperature Sensor/Switch (For Computer): Description and Operation
1999 Chrysler Cirrus L4-2.4L VIN XSECTION Description and Operation
Engine Coolant Temperature Sensor-2.4L:
ENGINE COOLANT TEMPERATURE SENSOR-PCM INPUT
The coolant sensor threads into the front of the cylinder head. New sensors have sealant applied to the threads.
The PCM determines engine coolant temperature from the coolant temperature sensor. The coolant temperature sensor has one element. The element supplies coolant temperature signal to the PCM. The PCM supplies coolant temperature information on the CCD Bus to the Body Control Module (BCM) for the instrument panel gauge cluster.
As coolant temperature varies, the coolant temperature sensor resistance changes resulting in a different current draw from the PCM.
When the engine is cold, the PCM will provide slightly richer air-fuel mixtures and higher idle speeds until normal operating temperatures are reached.
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.