Passat Syncro Wagon V6-2.8L (ATQ) (2000)
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Fuse no.34 must be OK.
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Coolant temperature must be at least 80°C, See Display group 04, display field 3
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Exhaust system must be properly sealed between catalytic converter and cylinder head.
Function test
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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: Computers and Control Systems/Testing and Inspection
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. Press -Q- button to confirm input.
Indicated on display
Read Measuring Value Block
HELP
Input display group number XXX
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Press 0, 3 and 0 for function "display group number 30", and then press Q to exit from input mode.
Indicated on display (1 - 4 = display fields)
Read Measuring Value Block 30
->
1
2
3
4
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Check status of oxygen sensor control before catalytic converter (display fields 1 and 3):
Specification: 111, display group 30 and its evaluation. Refer to Scan Tool Testing/Measuring Value Blocks (Function 08)/Evaluating Display
Groups 30-44, 99 See: Computers and Control Systems/Testing and Inspection
If the expected value(s) are not obtained:
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Test oxygen sensor heater before catalytic converter. See: Oxygen Sensor Heater For O2 Sensors Before (TWC), Checking/With Manufacturer's
Scan Tool
If specified values are obtained:
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Change to display group 32 as follows:
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Press -C- button.
Indicated on display
Read Measuring Value Block
Input display group number XXX
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Press 0, 3 and 2 for the function "display group number 32", and then press Q to exit from input mode.
Indicated on display (1 - 4 = display fields)