BECOME A MEMBER
Sign up with Facebook
I agree to the
Login with Facebook
NOT A MEMBER?
How do I check if the cooling fan ECU (attached.
2007 TOYOTA SIENNA
How do I check if the cooling fan ecu (attached to radiator) is working? Everything else seems to be working but I want to be sure before I replace this part.
have the same problem?
Wednesday, April 3rd, 2013 AT 2:31 AM
Are you referring to the temp sending unit? You need to check it for resistance.
Wednesday, April 3rd, 2013 AT 2:39 AM
No, I am referring to a black computer attached to the radiator. The two fans are wired to it.
Wednesday, April 3rd, 2013 AT 2:41 AM
1. INSPECT COOLING FAN ECU
a. Inspect the input voltage.
1. Disconnect the cooling fan ECU connector.
2. Turn the ignition switch to the ON position. Check the voltage of the +B terminal of the disconnected wire harness side connector.
9 to 14 V
If the result is not as specified, inspect the power source system (fusible link, fuse, wire harness and relay).
B. Inspect the cooling fan motor (See ON-VEHICLE INSPECTION ).
C. Measure the resistance between terminals RFC (ECM) and SI (cooling fan ECU) of the wire harness side connectors.
If the fan does not operate, there may be a short circuit.
If the fan remains operating, there may be an open circuit.
D. Inspect the ECM power source circuit and ground circuit.
Please consider a donation if we helped you
Wednesday, April 3rd, 2013 AT 5:54 AM
to post a reply.
Related Fan Replace/Remove Questions
How Do I Bleed Air From The Cooling System
My Engine Is Over Heating Just Replaced The Radiator Fans Do Not Work Fuses Are Good Head Gaskets Are Good How Do I Replace Fan Sensors...
Cooling Fan Runs Intermittently After Engine Is Shut...
The Cooling Fan Runs Intermittently After The Engine Is Shut Off. It Does This All Night Long Until The Battery Dies. It Will Kick On For...
1998 Toyota Sienna Air In Radiator
Engine Cooling Problem 1998 Toyota Sienna 6 Cyl Front Wheel Drive Automatic How Do I Get All The Air Out Of The Cooling System I...
2000 Toyota Over Heats
Your Suggestion Proved Generic And Useless. I Will Check The Thermostat. Radiator, And Water Pump. And Your Website Does Not Provide Back...
Ask a Car Question. It's Free!
Radiator Cooling Fan Replacement Chevrolet
Radiator Cooling Fan Replacement Chrysler PT
Find a car manual for your car
© 1999 - 2017 2CarPros, Inc.