A4 Quattro Sedan L4-1.8L Turbo (AWM) (2001)
A/C Signal: Testing and Inspection
A/C Compressor Shut-off, Checking
Special Tools and Equipment
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VAG1526A
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VAG1527B
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VAG1594A
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VAG1598/31
-
VAS5051 with VAG5051/1
NOTE:
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The A/C compressor signal communicates to the ECM that the compressor will be switched on in 140 ms.
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The Engine Control Module (ECM) can switch off the A/C compressor via the same wire connection.
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Engine Control Module (ECM) switches off A/C compressor:
- - during hard acceleration (Wide Open Throttle 1st gear)
- - in emergency mode (emergency operation)
- - after initiating basic setting (function 04)
Test requirements: