Quote:
Originally Posted by ROLLGUY
Thank you Tim for the great information!
"In your first sentence above you indicated you were able to see 6 codes and erase 4 - this indicates at that time your scan tool was able to see/communicate with the N3/9 CDI main control unit. As I recall the glow-plug output stage error is from the CDI control unit?"
I was not able to erase any codes in the CDI control unit, I only get the "fault Communication with ECU". Yes the glow-plug output stage error is from the CDI control unit. It had 2 codes that were stored and current. The other 4 were stored. My scan tool is able to communicate with all the modules, and will read and clear all codes except for the CDI module, it will not clear codes. That is the part that is baffling me. The car starts and runs, battery charging at 14.6 volts, but has a CEL and glow plug light on constantly.
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I still don't think I'm getting my point across.... Let's try it this way.
Right now, today at this moment can you communicate with the CDI control module N3/9? Can you get a menu that shows you options to take to read codes or look at live data in the N3/9 module?
I have a couple of aftermarket scan tools that I use as a backup to my SDS system, its not at all uncommon for those tools to not communicate with some of the control modules in the car. I've also seen them communicate with a module on one day and not communicate on another day.