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Tundra cooling fan kits available!
I have been wanting to install cooling fans on the Tundra for a while and have done so much research, I looked at all the cooling fans that Toyota has installed on there vehicles in the last 10 yrs and noticed that the Sienna has the cooling fans that would come the closest to fitting in size and it has the overflow tank that is mounted to the cooling fan assembly. I noticed that the sienna uses a cooling fan control module but wasn't sure how it worked, so I decided to call TRD sparks about my Questions, he referred me to the TIS website so I registered and payed for two days to research the Sienna diagrams and noticed that the Cooling fan control module is controlled by the ECM via a signal wire, #43. I then checked the tundra diagrams and noticed on the same connector on the ecm #43 controls the cotrol valve for the air injection. That pretty much a tells me why toyota decided not use cooling fans on the tundra, I think they figured out that the heads were dirty and had no choice but use the cooling fan circuit for the air injection, if we could only figure out how to program the ECM, we would have cooling fans. The Sienna cooling fans could still be used they would just need the control haness and module. I was just really hoping that the contol signal could be tapped into on the ecm so we could have control over the fans.
Last edited by texasranger96; 09-22-2012 at 03:07 AM.