The Mechanics of ABC News' Unintended Toyota Acceleration Hoax

[101lifts2]

Originally Posted by pauldun170

http://jalopnik.com/5488464/the-mech...eleration-hoax

The drawing they depicted does not make any sense...

VCP1 = 5V Reference for APP 1.
VCP2 = 5V Reference for APP 2.
VPA1 = Signal Circuit for APP 1.
VPA2 = Signal Circuit for APP 2.
EP1 = Low Reference for APP 1.
EP2 = Low Reference for APP 2.

So basically they are shorting the 5V reference for APP1 to the signal circuit of APP 2. If this happens a high voltage DTC will set for the APP2 and the pedal will default to 0%. Then, the APP1 signal voltage will be raised because they are shorting the APP 2 signal (which is shorted to 5V) through a resistor. This may increase in the pedal angle of sensor 1, but since sensor 2 is outside of the normal sensor voltage range, the pedal default should be 0.

So unless Toyota trusts sensor 1 even if sensor 2 is shorted to 5V (which I've never seen and highly doubt), what this guy is touting is pure bullshit.