CAUTION:

Be careful not to let your hands or other objects get caught in the rotating parts.
Since some of the power supply circuits are shared with other system, check such system other than the radiator fan system for faulty conditions before proceeding any further.
Since more than one faulty conditions may occur simultaneously, once work is done perform "Basic Inspection of Radiator Fan System" to confirm that the system is working properly.
Since battery discharge may occur, charge the battery as necessary. Ref. to STARTING/CHARGING SYSTEMS (H4DO)>BATTERY>CHARGE .
Use the check board when measuring the ECM terminal voltage and resistance. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>GENERAL DESCRIPTION>PREPARATION TOOL>HOW TO USE CHECK BOARD .

Operating condition:

Radiator fan operates depending on the radiator fan operation mode related to engine coolant temperature or the radiator fan operation mode related to A/C compressor load, whichever is higher as an operation mode.

Radiator fan operation mode related to engine coolant temperature (idle stop state)

Courtesy of SUBARU OF AMERICA, INC.
Radiator fan operation mode related to A/C compressor load

Courtesy of SUBARU OF AMERICA, INC.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Radiator Fan System: Inspection: Notes

Use the Manual With the Right Hardware

When to See a Mechanic