Quote:
Originally Posted by surreybc
I wonder why they get ground from the computer and not chasis then. The ones I can think of do have constant ground with ignition off because that is part of the trouble shooting check in fsm.The IACV is controlled by ground impulses from computer so a constant ground would mean it is on constantly. improving the computers ground might help also.
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The IACV and AAC valves are not included in the circuit the I added the ground to. I simply grounded the TPS, coolant temp sensor, and exhaust gas sensor directly. All those sensors use constant ground, not a switched or monitored ground circuit. The fact that all those sensors ground circuits are tied together confirms that there is nothing monitored or switched there. If you don't believe me then test it. You seem to be looking for an excuse not to try it rather than looking for a reason to try it.