GENERAL INFORMATION
The cooling system is designed to keep every part of the engine at appropriate temperature in whatever condition the engine may be operated. The cooling method is of the water-cooled, pressure forced circulation type in which the water pump pressurizes coolant and circulates it throughout the engine. If the coolant temperature exceeds the prescribed temperature, the thermostat opens to circulate the coolant through the radiator as well so that the heat absorbed by the coolant may be radiated into the air. The radiator is the corrugated fin, cross flow type. The water pump is of the centrifugal impeller type and is driven by the drive belt from the crankshaft.
CIRCUIT OPERATION
- Based on the signal from the engine coolant temperature sensor and the signal from the vehicle speed sensor < M/T > or the secondary pulley speed sensor signal (vehicle speed signal) from the transaxle control module (TCM) < CVT >, and the A/C switch signal from the A/C-ECU, the engine control module (ECM) sends the radiator fan and condenser fan control signal to the ETACS-ECU via CAN bus line.
- Based on the radiator fan and condenser fan control signal from the ECM, the ETACS-ECU turns ON/OFF the radiator fan relay, condenser fan relay, and the fan control relay to control the rotation of the radiator fan motor and condenser fan motor.
TECHNICAL DESCRIPTION
- If the radiator fan and condenser fan do not operate, the radiator fan motor, the condenser fan motor, the radiator fan relay, the condenser fan relay, the fan control relay, the ETACS-ECU may be defective.
- The CAN bus line, ETACS-ECU, CVT system, A/C system, or MFI system may also be defective.