System Overview: Notes

The engine cooling fan system consists of a belt driven cooling fan, with a mechanical fan clutch, mounted to the water pump. Vehicles sold in hot climates may be equipped with an auxiliary cooling fan system. The auxiliary cooling fan system consists of 2 electric cooling fans and 3 fan relays. The cooling fan relays are arranged in a series/parallel (S/P) configuration. This allows the engine control module (ECM) to operate both fans together at low or high speeds using 2 fan control circuits. The cooling fans receive positive voltage from the cooling fan relays, which receive battery positive voltage from the underhood fuse block. The auxiliary cooling fans are supplied a ground at G107.