Operation CHARM
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Audi
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1991
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90 Quattro 20V L5-2309cc 2.3L DOHC (7A)
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Repair and Diagnosis
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Heating and Air Conditioning
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Testing and Inspection
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Component Tests and General Diagnostics
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Quick-Checks
Quick-Checks
1.
A/C Select Switch and Compressor:
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Switch A/C select switch ON A/C compressor clutch should engage with an audible "click" and drive the compressor
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Switch A/C select switch OFF A/C compressor clutch should disengage ("click")