Q: What is the operation and testing procedure for the electric fan in the cooling system?
A: These models have a two-speed electric fan regulated by the PCM and fan relays. The fan functions at low speed during warm idle and at high speed when coolant temperature reaches 221 degrees F. Two high-speed relays ensure cooling even if one fails. Continuous fan operation may indicate sensor or relay issues. To test, warm the engine and check if the Radiator fan activates. If not, inspect the fuses, test the fan motor, and check the power supply to the low-speed fan relay. If necessary, replace the fan motor.