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Motronic 2.9 ECU Pin 33 and 54

4K views 1 reply 1 participant last post by  Vanagon Nut 
#1 ·
Hey folks.

So this Jetta 2.0 is in a Vanagon. It has run ok for thousands of miles but has had a few consistent minor issues.

I went through the harness, again, using several different versions of wiring diagram. I found:

No ground to ECU 33. ("sensors ground") This has been corrected. Associated sensors were connected to ground however.
VOM on ECU 1 and 54, no power, ign. off. I may have wired it to the 15 buss. Ran out of daylight to check.

What exactly does the ground to ECU 33 do?
What difference will it make if I wire ECU 54 to B+ (constant power)?

Thanks. Neil.
 
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