Passat Sedan 4Motion V6-2.8L (ATQ) (2003)
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Fuse no.34 must be OK.
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Battery voltage must be at least 11.5 volts.
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Fuel Pump (FP) relay must be working properly.
Test Sequence
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Connect V.A.G 1551 scan tool (VAG 1552). Start engine and select the 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 -8- to select "Read measuring value block" function 08. Press -Q- button to confirm input.
Indicated on display
Read Measuring Value Block
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 the status of oxygen sensor heater in display fields 1 and 3:
Specification: 111
011 also briefly, since the oxygen sensor heater is clocked. Evaluating measuring value blocks. Refer to Scan Tool Testing/Measuring Value
Blocks (Function 08)/Evaluating Display Groups 30-44, 99 See: Testing and Inspection/Scan Tool Testing and Procedures/With Manufacturer's
Scan Tool/Read Measuring Value Blocks (Function 08)/Evaluating Measuring Value Blocks/Display Groups 30-44, 99 (Oxygen Sensor Control)
If specified value is not obtained:
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Press -> button.
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Press buttons -0- and -6- to select "End Output" function 06. Press -Q- button to confirm input.
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Switch ignition off.
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Unplug 4-pin harness connector going to corresponding Heated Oxygen Sensor (HO2S):