Golf L4-2.0L (ABA) (1996)
Oxygen Sensor: Testing and Inspection
Heated Oxygen Sensor Control Test: After Converter
Special Tools, Testers And Auxiliary Items
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VAG 1551/1552 Scan Tool With VAG 1551/3 Adapter Cable
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VAG 1598/18 Test Box
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Multimeter (Fluke 83 Or Equivalent)
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Connector Test Kit VW 1594
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Wiring Diagram
Test Conditions
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Coolant temperature at least 80°C (176°F)
Functional Check
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Engine running at idle
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Connect VAG 1551/1552 scan tool and select "Engine Electronics" address word 01.
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 and press -Q- button to confirm input.
Indicated On Display
Read Measuring Value Block HELP
Input display group number XXX
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Press buttons -1-, -1- and -6- to input display group 116 and press -Q- button to confirm input.
Indicated On Display (1-4 = Display Fields).
Read Measuring Value Block 116-->
1 2 3 4
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Note HO2S Voltage (display Field 3).
Display Group 116: Display Fields 1-4
Continuation
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Carry out test drive to remove possible residue from HO2S and repeat the check.
If the specification in display field 3 is not attained even after a test drive:
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Check O2S heating.
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Increase engine speed to above 3000 RPM.
If the value in display field 3 remains constant.