Check the Engine Coolant Temperature (ECT) Sensor
ECT sensor is a thermistor device which changes resistance proportionate to temperature changes. ECT sensor inputs coolant temperature to the PCM. ECT sensor is threaded into heater outlet fitting or coolant passage.
PCM monitors engine operating conditions by input received from engine sensors. Control of output actuators determines fuel mixture and idle speed. PCM is located behind right kick panel.
The engine control system consists of the PCM, relays, modules, sensors, switches and actuators. The PCM sends out electrical reference signals to engine sensors and then analyzes the return signals. The engine sensors supply the PCM with specific information, in the form of electrical signals, to determine engine operating conditions.
Constant Control Relay Module (CCRM)
CCRM interfaces with the PCM to control cooling fan, A/C clutch and fuel pump operation. The CCRM also incorporates electronic engine control power relay to supply power to the EEC-V system.
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