Coolant Temperature Sensor/Switch (For Computer): Description and Operation

Coolant Temperature Sensor.:

Coolant Temperature Sensor (CTS) Wiring.:

DESCRIPTION
The coolant temperature sensor is identical to the air temperature sensor. it is mounted in a coolant passage located in the cylinder head. The signal received by the PCM indicates the temperature of the engine coolant, which is an indication of engine operating temperature. This sensor input is used by the PCM for fuel enrichment, ignition timing, EGR operation, canister purge control, idle speed control, and Closed Loop fuel control.

Coolant Sensor And Intake Air Sensor Resistance Chart.:

SENSOR RESISTANCE CHART
The chart lists the resistances of the air temperature sensor and coolant temperature sensor as compared to sensor resistance.