Passat GLX V6 V6-2.8L (ATQ) (2001)
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Test Heated Oxygen Sensor (O2S) and Oxygen Sensor Control after Three Way Catalytic Converter (TWC). See: Oxygen Sensor & O2S Control
Behind Three Way Catalytic Converter (TWC), Checking/With Manufacturer's Scan Tool
Functional Test for Heated Oxygen Sensor (HO2S) 2 Bank 2
Indicated on display
Basic Setting
Input display group number XXX
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Press 0 and 4 for "Display Group Number 44", and then press Q to exit from input mode.
Indicated on display (1 - 4 = display fields)
System in Basic Setting 44
->
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 "B2-S2 OK" is indicated.
If indications do not resemble description:
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Test Heated Oxygen Sensor (O2S) and Oxygen Sensor Control after Three Way Catalytic Converter (TWC). See: Oxygen Sensor & O2S Control
Behind Three Way Catalytic Converter (TWC), Checking/With Manufacturer's Scan Tool
With Generic Scan Tool
Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC), checking
NOTE: When servicing terminals in harness connector of Heated Oxygen Sensor (HO2S), use only goldplated terminals.
Recommended special tools and equipment
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V.A.G 1526 multimeter or V.A.G 1715 multimeter
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V.A.G 1594 Connector test set
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Wiring diagram
Test requirements
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The respective fuses of Heated Oxygen Sensor (HO2S) -G39- and Heated Oxygen Sensor (HO2S) 2 -G108- must be OK:
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Battery voltage must be at least 11.5 volts.
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All electrical consumers like, for example, lights and rear window heating must be switched off.
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Parking brake must be engaged or else daylight driving lights will be switched on.
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If vehicle is equipped with an A/C system, it must be switched off.
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Ground (GND) connections between engine and chassis must be OK.
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Exhaust system must be properly sealed between catalytic converter and cylinder head.
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Coolant temperature must be at least 80°C, Diagnostic mode 1: Check measuring values; PID 5, Coolant temperature. Refer to "Scan Tool
Testing/Diagnostic Mode 1: Check Measuring Values". See: Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan
Tool/Diagnostic Mode 1: Check Measuring Values
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Oxygen sensor heaters for oxygen sensors before catalytic converter must be OK, See: Testing and Inspection/Component Tests and General