Having the same problem, spoke to Toyota mechanic friend of mine and said its most likely the AC relay.
The problem with your air conditioning light blinking in the 4runner is a bad relay. Toyota has updated the relay to part #90987-02028. Call your local Toyota dealership for this relay. You can buy it at the parts counter. It is about $65. It takes 1 minute to replace. This same procedure is for the Camry and other Toyota models with the same blinking AC light, but the relay part number might differ.
R134
how do I remove the climate control from a 1999 toyota 4runner
Freon but you can convert over to the new stuff
A 1991 Toyota 4runner is bigger than a 1990 4runner
it mounted on the throttle body
Below the center console.
There is no recall for the Toyota 4runner transmission. Some Toyota's have had break problems that may have started the recall rumors on some Toyota products but, there is no recall for the Toyota 4runner transmission.
The 2012 Toyota 4Runner has 24 valves.
The 2012 Toyota 4Runner has a V6 engine.
The 2010 Toyota 4Runner has 16 valves.
The 2014 Toyota 4Runner has 24 valves.