Radiator Cooling Fans

NOTE: For radiator cooling fan relay testing, see RELAYS under RELAYS & SOLENOIDS.

The ECU controls radiator cooling fan(s) based on vehicle speed, engine coolant temperature and A/C switch position. The following tables list correct cooling fan operation based on certain conditions. See appropriate A/C SWITCH ON or A/C SWITCH OFF table.

If cooling fan does not operate as specified, see RADIATOR (COOLING) FAN CONTROL diagnostic chart. Diagnostic chart is not available for Pathfinder and Pickup.