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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going to resove the 5 cylinder issue i have this weekend (or at leat hope lol)
ive done an engine swap into a new car, (the coilpacks & injectors themselves workt fine when engine was runnig in old car)
im expecting the rest of the connections on the loom to be all green/corroded, as the temp sensor one was foul!
so after cutting & cleaning the temp sensor resoved the over fueling issue,
i can see the first couple of injectors, which are on the inside of the intake plenum things lol
where are the others? hiding underneath at the back? is the balance bar hard to remove?
any tips on cleaning the injector connections be great, (the coilpack connections look clean & healthy)
but ive a feeling the injectors are smelly (i cant think what else would make it run on 5)