New Beetle L4-2.0L (AZG) (2003)
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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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Exhaust system between catalyst and cylinder head must be free of leaks
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Coolant temperature must be at least 85 °C, see display group 04, display zone 3
Functional check
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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: Computers and Control Systems/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 measured value block" and confirm entry with Q button.
Indicated on display
Read measured value block
Input display group number XXX
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Press buttons 0, 3 and 0 for "Display group number 30" and confirm entry with Q button.
Indicated on display: (1 to 2 = Display zones)
Read measured value block 30
->
1
2
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Check status of oxygen sensor control after catalyst (display zone 2).
Specification: 1 1 0
NOTE:
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The first position of the 3 digit number block fluctuates between 0 and 1 (Heated oxygen sensor on and off).
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The third position of the 3 digit number block will be set to 1 only at increased exhaust temperature and part load.
Significance of 3 digit number block in display zone 2