Passat Sedan L4-1781cc 1.8L Turbo (AEB) (1999)
Oxygen Sensor: Testing and Inspection
Oxygen Sensor After Catalyst
Oxygen Sensor Heating After Catalyst Checking
Oxygen sensor heating (for Oxygen sensor after Three Way Catalyst), checking
Special tools, testers, measuring instruments and auxiliary items required
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VAG 1551/1552 Scan Tool with VAG 1551/3B adaptor cable
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VAG 1598/22 Test Box
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Fluke 83 Multimeter
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VW 1594 Adaptor kit
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Wiring diagram
Check conditions
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Fuse 29 must be OK.
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Battery Voltage 11.5 Volts minimum
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Fuel pump relay must be OK
Test sequence
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Connect VAG 1551/1552 Scan Tool, See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting
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Start engine and let idle
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Press 0 and 1 buttons to select "Address word" 01 "Engine electronics"
Display will appear as shown
Rapid data transfer
HELP
Select function XX
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Press 0 and 8 buttons to select Function 08: "Read measuring value block"
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Press Q button to enter input
Display will appear as shown
Read measuring value block
HELP
Input Display group number XXX
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Press 0, 4 and 1 buttons to select "Display group 41"
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Press Q button to enter input
Display will appear as shown (1 to 4 = Display zones)
Read measuring value block 41
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