Does anyone have any circuit information on what the ECM quad driver QDM3 controls on a '95 SE?

-b

I don't see a number 3 driver in the book. What code number are you getting?

It'* not a code, per se -- I'm looking at the ALDL data itself (mode 1, message 0 ECM response). Byte 57 is the "IOD port A input mode word," and bit 6 apparently corresponds to QDM3 normal/fail. It isn't throwing an error code, so I'm just curious if I'm misinterpreting the data, if this particular error doesn't throw a code, or what.

But all the datastreams specs I've seen list it as QDM3 -- they list 5 of them altogether, from 1 to 5.

Maybe it'* called QDM C instead of 3?

-b

There may be five, but the dealer manual says that the Tech 1 tool only recognizes QDM 1, 2, and 4.

Then I'll ignore 3 and 5 Solves that problem rather nicely.

Thanks!

Oh, for future reference -- what do QDMs 1, 2, and 4 control?

-b