If what I've found is accurate, the speedometer itself takes the VSS AC signal and converts it to a DC output that is then sent to 3 other components. The receiving components are ECCS (ECU), Power Steering and Cruise Control. So the ECU itself does not tell the Power Steering Control Unit to adjust the amount of assist.
At the moment I am attempting to confirm what type of output the speedometer is sending. Some search results state its a frequency output of 2Hz - 120Hz, others listed it as a PWM ranging from 0v to 5v, and all of them agree its DC.
I'm still digging through related posts on the forum here as well, though a lot of links on older posts are dead.
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Silver ·
im not sure if my auto is behaving itsself or not
it seems to shift well particually in the first two gears but seems to shift later into third unless i back off a bit.
there are no fault codes from the basic check and the oil looks clean and not burnt.
should an oil change and a clean of the filter sort it out or could it be a solinoid.
is it likly there is any physical damage to the box?