Auxiliary Water Pump: Description and Operation

The electric coolant pump is used on all vehicles. The pump is located in the left side of the engine compartment near the battery.

The pump is controlled by the ATC control module and is only operational under the following conditions:
1. Vehicle speed below 27 Km/h (17 mph).
2. Coolant temperature above 65° C (150° F) but less than 110° C (230° F).
3. Any blower speed setting.
4. Temperature heat setting above the halfway setting (60% heat).
5. The pump will turn off at speeds above 48 Km/h (30 mph).
6. The pump will turn off if the coolant temperature rises above 110° C (230° F).