New Beetle GLS L4-1.8L Turbo (AWV) (2001)
A/C Signal: Testing and Inspection
Signal From/to Air Conditioning, Checking
Special tools, test equipment and auxiliary items
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VAG 1551 scan tool or VAG 1552 mobile scan tool with VAG 1551/3B cable
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VAG 1598/31 test box
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VAG 1526 hand multimeter or VAG 1715 multimeter
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VAG 1594 adapter set
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Electrical Wiring Diagram
Test conditions
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All fuses must be OK
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Battery voltage must be at least 11.5 V
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Air conditioner functioning OK
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Air conditioner must be switched off
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All electrical accessories, e.g. lights and rear window defroster must be switched off
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No DTCs must be stored in DTC memory, Checking and Erasing DTC Memory. See: Testing and Inspection/Reading and Clearing Diagnostic
Trouble Codes/Reading Diagnostic Trouble Codes
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Vehicle at room temperature (warmer than +15 °C)
Test sequence
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Connect VAG 1551 scan tool ((VAG 1552). Start engine and select "Address word" 01 of Motronic Engine Control Module (ECM) -J220-.
Engine must be running at idle speed.
Indicated on display
Rapid data transfer
HELP
Select function XX
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Press buttons -0- and -8- for function "Read measuring value block" and confirm entry with -Q- button.
Indicated on display
Read measuring value block
Input display group number XXX
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Press buttons -0-, -5- and -0- for "Display group number 50" and confirm entry with -Q- button.
Indicated on display (1 to 4 = Display zones)
Read measuring value block 50
->
1
2
3
4
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Check specifications for air conditioner (display zones 3 and 4)