Electric Fan Switch
These vehicles do not use a separate cooling fan switch; the function of the cooling fan switch is integral with the Powertrain Control Module (PCM). The PCM receives a signal from the Engine Coolant Temperature (ECT) sensor, which it uses to decide when to turn the electric cooling fan on. To turn the cooling fan on, the PCM sends a signal to the Constant Control Relay Module (CCRM), which houses the cooling fan relay and relay control unit. The cooling fan relay and relay control unit operate the cooling fan until the PCM decides the fan should be turned off.
Removal & Installation
- Disconnect the negative battery cable.
- Disengage the wiring harness connector from the electric cooling fan.
If necessary for added clearance or access to the fan mounting bolts, remove the coolant overflow reservoir.
- Remove the cooling fan mounting fasteners, then lift the fan up and out of the engine compartment.
- If necessary, the fan and motor can be separated to replace either component, as follows:
If separated for replacement, assemble the fan and motor, as follows:
- Position the motor on the shroud bracket and install the retaining nuts. Tighten the nuts to 49-62 inch lbs. (5.5-7.0 Nm).
- Install the fan on the motor shaft using the retaining clip.
- Install the cooling fan in its original position, against the radiator.
- Install the mounting fasteners, and tighten them to 71-92 inch lbs. (8-10.5 Nm).
- If applicable, install the coolant overflow reservoir.
- Fasten the motor wiring connector to the harness. Make sure the lock finger on the connector snaps firmly into place.
- Connect the negative battery cable.
- Run the engine and check for proper fan operation.