AC Issues-Part2
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Race Director
Joined: Sep 1999
Posts: 10,008
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From: cincinnati ohio
CI 5-6-7-8-9-10 Veteran
AC Issues-Part2
OK guys. We have a 01 Z06 and after heads,cam, FAST90/90 and supporting mods we have an AC system that will blow cold but will not stay engaged. It will cycle on and off intermittently. Freon level is full. I use HP Tuners and when monitoring status bits in the scanner we see that the VCM is constantly requesting AC and the disable pressure is steady state and never reached. Although we have all these truths you can watch the AC Status and AC Clutch Status goes on and off although the request stays on. We have many codes that i usually see with these things but one code in particular shows more often than to many different modules. Code U1064 shows up as an error to the HVAC,Convenience,Entertainment and HUD Module. The code reads as such.....Loss od Communications with DIM. A second code that shows up in a few is U1016 and it reads as a Loss of Class 2 Communication with VCM. Any ideas guys?
