Quote:
Originally Posted by LMP
Wiring continuity is still my prime suspect. I remember having tested continuity to the EGR valve right from the pins B1 , K3 at C111 and E2 at C110. WIth KEY ON and EGR plug connected, 12V is fed to all EGR coils and returns through the coils and wiring to all 3 contacts so you should measure 12V on each .
ABout transmission, if it shifts to all gears 1,2,3,4 then it is cleared from DTC 56 . If TCC applies then it is clear from DTC 26.
Tech 1 scanner is proprietary to GM...not on the market in as much as I know...
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I will check the EGR wiring again using a volt meter as you described. I will be sure to do a vigorous 'flex test' simultaneously.
Last road test I still had the MIL going out intermittently around 85 to 110 kph. I don't seem to get that when I rev the engine at a stand still, maybe up to 4000 rpm. Does that indicate anything to you?
It seems to always shift through all 4 gears. What indicator do I look for that the clutch is actually energizing, and it's not all just fluid coupling that's taking place? At what point does the clutch energize?