Can someone enlighten me as to where it resides on the ECU? Everything I see has a plug in it and yes, it's a noob question... Cheerz, Joel
you ca do an on-ECU error code scan by twisting the screw potentiometer that is on the ECU, and counting the blips of the Red LED.
those Blips on the LED also flash in sync with the check engine light on the dash for easier viewing. (well mine do I am yet to find if all Z32's are made equal)
sorry I meant than when the trimpot is turned on the ecm that the check engine light flashes with the led on the ecm. I personally have never seen the check engine light on even though I had a dud set sensor at the start. that was throwing a code but I only saw it by going into diagnostic mode.