Has anyone in here ever replaced the CIS contoller on a 190e2.6?

Is it simply plug and go?, or does software have to be uploaded and parameters set etc?

I have two reasons to suspect the CIS controller is faulty.
1) NO current at all going to FI controlls such as air/idle valve or EHA. They just sit there asleep and inactive. This explains why I couldn't get my my Lambda adjusted.

2) I took the cover offt the CIS controller and there is a burned spot on the circiut board.

Do you think I found the problem?

Blue

 

GUYS!GUYS!GUYS!

I pulled the wiper,blower, and evaporator assy out to inspect computer harness and found three chewed wires! So nowI found theproblem and the cause, hopefully.

I carefully repaired the wires and wrapped them very well.
The rectifier diode in the CIS computer was toasted. You could see and smell that ithad smoked.

I didn't have any diodes, and our local RadioShack had closed so I borrowed two out of my wife's cell phone charger. (I'll get her a new one today, I had to smash it open.)

Then I removed the old diode, cleaned up the board a little, and soldiered in the replacement, cleaned-up again, then tested my work with an old anolog meter.

I re-installed the CIS controller after the field repair, and my car cranked on the first hit. The Lambda was WAY too rich, so I adjusted it again, and this time got it close. The EHA is working finally, which I had already replaced.Oh well, I have a spare now.

I'm still going to get a new CIS controller. I trust my own work, but after all that one has been through, and considering its age, its time for a new one. But it did help me find the problem. I'll keep it as a back-up. Photos attached.