Converting an older Toyota to the new 2GR means adapting a few sensors. You can either run the engine coolant temperature sensor for the factory 2GR ECU parallel with the factory SW20 coolant temperature gauge sensor or use this one sensor for both!
Running this three-wire sensor will allow you use pins 1&2 for the factory 2GR setup and pin #3 for the factory AW11/SW20 gauge read out.
OEM or Equivalent Quality/Brands
Toyota Part Number(s): 89422-16010