Beetle L4-1781cc 1.8L Turbo (APH) (1999)
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Fuse 43 must be OK
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The battery voltage must be at least 11.5 V
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Fuel pump relay must be OK
Test sequence
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Connect scan tool VAG 1551 (VAG 1552). Start engine and select "Address word" 01 of engine control module. When doing this the engine must
be running at idle speed. Connecting scan tool and selecting engine control module. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial
Checks/VAG 1551 Scan Tool", See: Powertrain Management/Computers and Control Systems/Testing and Inspection
Indicated on display
Rapid data transfer
HELP
Select function XX
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Press keys 0 and 8 for the function "Read measuring value block" and confirm entry with Q key.
Indicated on display
Read measuring value block
Input display group number XXX
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Press keys 0, 4 and 1 for "Display group number 41" and confirm entry with Q key.
Indicated on display (1-4 = Display zones)
Read measuring value block 41
->
1
2
3
4
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Check status of HO2S in display field 2.