Golf GL L4-2.0L (AZG) (2001)
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Multimeter Fluke 83 or equivalent
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VAG1594 connector test kit
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Wiring diagram
Test requirements
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All fuses must be OK.
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Battery voltage must be at least 11.5 volts.
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Fuel Pump (FP) relay must be OK.
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Connect V.A.G 1551 scan tool (VAG1552). Start engine and select the Engine Control Module (ECM) using address word 01. See: Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting
Indicated on display:
Rapid data transfer
HELP
Select function XX
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Press buttons -0- and -8- to select "Read measuring value block" function 08. Press -Q- button to confirm input.
Indicated on display:
Read measuring value block
Enter display group number XXX
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Press buttons -0-, -4- and -1- to select "Display group number 41". Press -Q- button to confirm input.
Indicated on display: (1 to 4 = display fields)
Read measuring value block 41
->
1
2
3
4
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Let engine run at idle for 2 minutes.
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Check the status of the oxygen sensor heater in display field 2:
Display: Htng.bef.cat.ON,
Htng.bef.cat.OFF (alternating)
NOTE: Depending on the operating condition of the engine, oxygen sensor heating can be switched on or off, i.e. the indications in display field 2 or 4
can be either Htng.bef.cat.ON or can alternate between Htng.bef.cat.ON/Htng.bef.cat.OFF.
If indications do not resemble description:
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Press -> button.
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Press buttons -0- and -6- to select "End data transfer" function 06. Press -Q- button to confirm input.
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Switch ignition off.