Cooling fan only operates on low speed?

2013 TOYOTA HIGHLANDER
135,000 MILES • 3.5L • V6 • 4WD • AUTOMATIC
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VOODOOSKYLINE
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  • 1 POST
The cooling fan turns on and off with A/C compressor but only at low speed. Checked tested relay, fuses. Tested cooling fan, highspeed works on bench. When the coil sensor is disconnected the cooling fan switches on to high-speed for a moment before shutting down.
Jul 8, 2023 at 1:24 PM
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JACOBANDNICKOLAS
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Hi,

The system isn't designed to run in high until it reaches between 212 and 216 F degrees. It still not working at that point?

If that is the case, take a look through the pics below. It provides basic on-vehicle diagnostics for the cooling fans ECU. Take a look at them and let me know if you are comfortable performing them.

Let me know.

Take care,

Joe

See pics below.
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Jul 9, 2023 at 8:04 PM