New Beetle GLS L4-2.0L (AVH) (2001)
A/C Signal: Testing and Inspection
Signal From/to Air Conditioning System, Checking
Special tools and equipment
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Scan tool VAG 1551 or vehicle system tester V.A.G 1552 with cable VAG 1551/3B
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Test box V.A.G 1598/31
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Hand multimeter V.A.G 1526 or multimeter V.A.G 1715
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Adapter set V.A.G 1594
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Wiring diagram
Test conditions
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All fuses must be Ok
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The battery voltage must be at least 11.5 V
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All electrical consumers, e.g. lights and rear window heating must be switched off
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No DTCs must be stored in DTC memory. Refer to "Clearing Trouble Codes/With Manufacturers Scan Tool/DTC Memory Checking and
Erasing" See: Testing and Inspection
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Air conditioner functioning OK
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Air conditioner must be switched off
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Vehicle at room temperature (warmer than +15 °C)
Test sequence
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Connect scan tool VAG 1551 (V.A.G 1552). Start engine and select "Address word" 01 of engine control module. Engine must be running at idle
speed.
Connecting scan tool and selecting Engine Control Module (ECM). Refer to "Scan Tool Testing/Scan Tool Connecting and Initial
Checks/VAG1551 Scan Tool" See: Testing and Inspection
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 (1-4 = Display zones)
Read Measuring Value Block 50
->
1
2
3
4
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Check specifications for air conditioner (display zone 4)