Radiator Cooling Fan Motor: Description and Operation

DESCRIPTION
The fan control system consists of:
1. Two one-speed engine cooling fan motors attached to a fan shroud located behind the radiator.
2. The radiator electric motor is wired to operate only when the ignition switch is in the RUN position, thereby preventing radiator electric motor operation after the ignition switch is turned to the OFF position.

WARNING: Disconnect the radiator electric motor prior to performing any underhood service since the radiator electric motor could cycle if the ignition switch is left in the on position even though the engine is not running.

OPERATION
The cooling fan system is controlled during vehicle operation by the Constant Control Relay Module (CCRM) and the Powertrain Control Module (PCM) which will energize the radiator electric motor under the following conditions:
1. The engine temperature is higher than normal. Radiator electric motor starts running at 102° C (215° F) and stops running at 99° C (210° F).
2. A/C clutch is engaged.

NOTE: The normal operation and cycling of the radiator electric motor causes the temperature gauge indicator to read between the mid-point and upper portion of the temperature gauge scale. The slightly higher indicator reading returns to mid-point when radiator electric motor operation begins.