Nate
SS2 is the speed sensor inside the front diff feeding the speedometer for US cars. Harvey is correct. Best not to be adding to confusion here, when enlightenment is what's called for.
The US wiring follows the same convention as the Australian wiring. The front sensor is not the same type, and operates in a different position, but it does measure the rotation [or speed, if you like] of the front axle, and is referred to in the diagnostics as SS2.
Joe
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