Passat Syncro Wagon V6-2.8L (ATQ) (2000)
Oxygen Sensor: Testing and Inspection
Heated Oxygen Sensor After Three Way Catalytic Converter, Check
Heated Oxygen Sensor (HO2S) After Three Way Catalytic Converter (TWC), Checking
Special tools and equipment
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V.A.G 1551 Scan Tool (or VAG 1552 mobile scan tool) with VAG 1551/3 cable
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VAG 1788/10 RPM adjuster
Test condition
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Coolant temperature must be at least 80°C, See Display group 04, display field 3
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Connect V.A.G 1551 scan tool (VAG 1552). Start engine and select Engine Control Module (ECM) using address word 01. Refer to Scan Tool
Testing/Scan Tool Connecting and Initial Checks/Connecting V.A.G 1551 Scan Tool See: Testing and Inspection/Reading and Clearing
Diagnostic Trouble Codes/Scan Tool Connecting/With Manufacturer's Scan Tool/Connecting VAG 1551 Scan Tool
Indicated on display
Rapid data transfer
HELP
Select function XX
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Press buttons -0- and -4- to select "Basic Setting" function 04. Press -Q- button to confirm input.
Heated Oxygen Sensor (HO2S) 2 bank 1 functional test
Indicated on display
Basic Setting
Input display group number XXX
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Press 0, 4 and 3 for function "display group number 43", and then press Q to exit from input mode.
Indicated on display (1 - 4 = display fields).
System in Basic Setting 43
->
1
2
3
4
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Use VAG 1788/10 RPM adjuster to adjust engine RPM to 1800-2400 RPM:
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Hold RPM constant at 1800-2400 until indication in display field 2 shows
Cat. temperature at least 350 °C
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and in display field 4:
"Test OFF" changes to "Test ON".
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Continue to hold RPM constant until in display field 4 expected value "B1-S2 OK" is indicated.
If indications do not resemble description: