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a8 tech · 08-04-2007, 03:24 PM

You need to check why there is no communication via Kwire,if the voltage at the Kwire diagnostic pin is ok and all supply feeds and earths ok at climatronic unit then it would make sense that the climatronic unit is defective.This could easily be overcome by swapping the unit for another from a doner vehicle to get the diagnostic pricess started.The problem you have here is that no diagnostic communication means that no values can be checjed in measured blocks however other control units for example read the a/c compressor activation,look in engine ecu measured value blocks for compressor readings channel 50
050,1,Engine Speed,(actual),Specification (Idle): 650...750 RPM\nSpecification (Load): 1900...2200 RPM\nRange: 0...6800 RPM
050,2,Engine Speed,(specified)
050,3,A/C Readiness,,Range: A/C-Low / A/C-High
050,4,A/C Compressor,,Range: Compr.OFF/Compr.ON

08-04-2007, 03:24 PM	#2 (permalink)
a8 tech Expert Join Date: Apr 2007 Location: not telling you Posts: 619 Gallery: (0)	You need to check why there is no communication via Kwire,if the voltage at the Kwire diagnostic pin is ok and all supply feeds and earths ok at climatronic unit then it would make sense that the climatronic unit is defective.This could easily be overcome by swapping the unit for another from a doner vehicle to get the diagnostic pricess started.The problem you have here is that no diagnostic communication means that no values can be checjed in measured blocks however other control units for example read the a/c compressor activation,look in engine ecu measured value blocks for compressor readings channel 50 050,1,Engine Speed,(actual),Specification (Idle): 650...750 RPM\nSpecification (Load): 1900...2200 RPM\nRange: 0...6800 RPM 050,2,Engine Speed,(specified) 050,3,A/C Readiness,,Range: A/C-Low / A/C-High 050,4,A/C Compressor,,Range: Compr.OFF/Compr.ON __________________ i use vag com 805 Last edited by a8 tech : 08-04-2007 at 03:30 PM.