Passat Wagon L4-1781cc 1.8L Turbo (AEB) (1998)
Oxygen Sensor: Testing and Inspection
Oxygen Sensor Before Catalyst
Oxygen Sensor Heating Before Catalyst Checking
Oxygen sensor heating (Oxygen sensor before 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 OK.
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Battery Voltage 11.5 Volts minimum
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Fuel pump relay OK
Test sequence
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Connect VAG 1551/1552 Scan Tool, See: Powertrain Management/Computers and Control Systems/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 buttons 0, 4 and 1 to select "Display group 41"
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Press Q button to enter input