ZR-1 Net Registry Forums - View Single Post

tccrab · 10-26-2006

How old is the battery?
Have you tried cleaning the battery terminals?
If it's not putting out 12V, all kinds of problems can surface.

The ECM 51 indicates that there's a problem with the PROM.
The CCM 41 indicates problems with serial data from the ECM.
The ASR 72 I believe also indicates problems with serial data from the ECM.

This is pointing to the ECM as the culprit.
This is not especially good news, as the ECM's are rather difficult to find.
I replaced mine last month because of a fuel injector problem and was luckily able to order one directly from my local Chevy dealer. Since then, it appears that GM has run out of stock.

Good luck!

TomC
'90ZR1 #792

10-26-2006	#4
tccrab Join Date: Oct 2004 Location: Folsom CA Posts: 1,661	Re: Service ASR trouble How old is the battery? Have you tried cleaning the battery terminals? If it's not putting out 12V, all kinds of problems can surface. The ECM 51 indicates that there's a problem with the PROM. The CCM 41 indicates problems with serial data from the ECM. The ASR 72 I believe also indicates problems with serial data from the ECM. This is pointing to the ECM as the culprit. This is not especially good news, as the ECM's are rather difficult to find. I replaced mine last month because of a fuel injector problem and was luckily able to order one directly from my local Chevy dealer. Since then, it appears that GM has run out of stock. Good luck! TomC '90ZR1 #792