Cooling Fan Description
The electric cooling fans aid air flow through the radiator. Electric motors
attached to the radiator support drive the fans. Coolant temperature activates
the fans. A switch can activate the fan motor when the air conditioning compressor
is operating. In order to prevent overheating, the Powertrain Control Module
(PCM) regulates the voltage to the cooling fan relay, which activates the
fan when the engine coolant temperature exceeds 106°C (220°F).
Electric Cooling Fans
Electric motors drive the engine cooling fans. The motors are attached
to the fan shroud at the rear of the radiator. The left and the right fans
have 5 blades, and these are 299.0 mm (11.77 in) in diameter.
The fans have two speeds, high and low.
Cooling Fan Relays
The engine cooling fan relays provide the high current necessary for
the cooling fan motors based on a low current signal coming from the Powertrain
Control Module (PCM). This signal is a function of the following inputs: