by numberplate on Tue, 27 Dec 2016 3:23 +0000
it can be done , but its a safety feature as has been mentioned. If you get desparate and really need to do it , download the wiring diagrams from the Toyota website , find the speed sense wire ( SPD ) going from the speedo to the audio unit , and cut that. Violet color , pin 7 at head unit , pin 19 at speedo. Use this mod at your own risk.