The cooling fan of the engine is not functioning. Could I have the wire diagram for the cooling system?
Feb 27, 2025 at 7:28 PM
Cooling fan not functioning, wiring diagram for the cooling system needed?
2001 TOYOTA SIENNA
BLESSING EWOBOR
- MEMBER
- 753 POSTS
Advertisement
JACOBANDNICKOLAS
- ✓ASE Certified Mechanic
- 110,194 POSTS
Hi,
Before tearing into the circuit, run power directly to the fans to make sure they are functional. If they are, keep in mind there are three relays. I just took a look and from what I'm seeing, fan relay 1, located in under the hood in the engine compartment, must work for the other two to get power. I would start there.
I attached the wiring schematic below for you. I had to cut the pic in two to make it readable. I did overlap the two so you can follow from one to the next.
I hope this helps. Let me know if you have questions.
Take care,
joe
See pics below.
Before tearing into the circuit, run power directly to the fans to make sure they are functional. If they are, keep in mind there are three relays. I just took a look and from what I'm seeing, fan relay 1, located in under the hood in the engine compartment, must work for the other two to get power. I would start there.
I attached the wiring schematic below for you. I had to cut the pic in two to make it readable. I did overlap the two so you can follow from one to the next.
I hope this helps. Let me know if you have questions.
Take care,
joe
See pics below.
Images (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Click here to log in and view diagram.
Feb 28, 2025 at 8:39 PM
Thank you very much.
Mar 1, 2025 at 8:48 AM
STRAILER
- ✓ASE Certified Mechanic
- 54,832 POSTS
JACOBANDNICKOLAS is one of our best, let us know if you need anything else.
Mar 3, 2025 at 10:27 AM
Thank you.
Mar 4, 2025 at 11:04 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.