GTI V6-2.8L (BDF) (2002)
A/C Signal: Testing and Inspection
With Manufacturer's Scan Tool
A/C Compressor Signal, Checking
Special tools, workshop equipment, testers, measuring instruments and auxiliary items required
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VAG 1551 Scan tool (or VAG 1552) with VAG 1551/3 adapter cable
NOTE: All functions which could previously be performed with VAG 1551/1552 can also be performed with the VAS 5051.
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VAG 1526 Hand multimeter or VAG 1715 multimeter
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VAG 1594 Adapter set
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VAG 1598/31 test box
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Electrical Wiring Diagrams
Test prerequisites
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The fuses must be OK.
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The battery voltage must be at least 11.5 V.
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All electrical accessories, e.g. lights and rear window heating must be switched off.
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Selector lever must be in position "P" or "N" on vehicles with an automatic transmission.
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Air conditioner functioning OK.
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Air conditioner must be turned off.
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Vehicle at room temperature (warmer than + 15 degrees C).
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No Diagnostic Trouble Code (DTC)s must be stored in DTC memory.
See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Reading Diagnostic Trouble Codes
Test sequence
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Connect VAG 1551 Scan tool (or VAG 1552) and select engine electronics control module with the "Address word" 01. When doing this the
engine must be running at idle speed
Indicated on display:
Rapid data transfer
HELP
Select function XX