Passat GLS Wagon L4-1.8L Turbo (AUG) (2001)
If oxygen sensor heater is not active:
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Test oxygen sensor heater before catalytic converter. See: Heater Check
If oxygen sensor or oxygen sensor control is not active:
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Test oxygen sensor wires
Additionally, for engine code ATW:
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Check oxygen sensor voltage
If specified value is obtained:
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Change to display group 32 as follows:
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Press -C- button.
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Press buttons -0-, -3- and -2- to select "Display group number 32". Press -Q- button to confirm input.
Indicated on display: (1 to 4 = display fields)
Read measuring value block 32
->
1
2
3
4
-
Check oxygen sensor adaptation values (additive) at idle in display field 1. Specification: -10.0 to 10.0 %
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Check oxygen sensor adaptation values (multiplicative) at partial throttle in display field 2. Specification: -10.0 to 10.0 %
If specified value is not obtained:
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Evaluation display group 32. Refer to "Scan Tool Testing/Measuring Value Blocks (Function 08)/Evaluating Measured Value Blocks/Evaluating
Display Groups 30 to 49, 99", See: Testing and Inspection
If specified value is obtained:
-
Change to display group 33 as follows: V.A.G 1551 Scan Tool (ST): Press button 3 VAG 1552 mobile scan tool: Press | button.
Indicated on display: (1 to 4 = display fields)
Read measuring value block 33
->
1
2
3
4
-
Observe oxygen sensor control in display field 1. Indication should oscillate in the range from -10.0 to 10.0 % by at least 2 %.
If specified value is not obtained:
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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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Free Heated Oxygen Sensor (HO2S) with a road test and repeat test.
Observe the safety precautions that apply to road tests.
If specified value in display field 1 is not obtained even after road test or if value does not fluctuate at least 2 %:
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Replace Heated Oxygen Sensor (HO2S) -G39-.