TT Coupe L4-1.8L Turbo (AWP) (2005)
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To test A/C cooling efficiency with switch removed, bridge terminals -1- and -2- on connector -B-.
NOTE: Refrigerant system remains closed due to Schrader valve under switch in line connection.
Checking
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Start engine.
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Switch compressor on (select AUTO mode).
If the compressor is activated:
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Disconnect harness connector -B- from switch.
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A/C Compressor will stop (low pressure switch open).
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Remove switch -A- and install harness connector -B-.
A/C Compressor will not be activated (low pressure switch open).
If the compressor is not activated:
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Disconnect harness connector -B- from switch -A- and bridge terminals -1- and -2- on harness connector -B-.
The compressor will be activated.
NOTE:
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If the compressor is activated when the terminals are connected together, refrigerant system pressure is low or system is empty (check refrigerant
system pressures.
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If the compressor is not activated and the measuring value block display indicates A/C pressure switch -F129- as the cut-off condition, there is an
open circuit in the wiring between A/C pressure switch -F129- and A/C control head -E87-. Trace and repair open circuit after performing
electrical test.