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90CS Quattro V6-2.8L (AAH)
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Technical Service Bulletins
Control Assembly: Technical Service Bulletins
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A/C Control Head - On Board Diagnostic Information
Overview
A/C Control Head on-Board Diagnostic (OBD) Display, Checking
On-Board Diagnostic (OBD) Display, Channels 1-61
Malfunctions Displayed on Diagnostic Channel 1
Diagnostic Channel 52 - Graphics Channel 1
Diagnostic Channel 53 - Graphics Channel 2