Jetta Sedan L4-2.0L (BBW) (2005)
Oxygen Sensor: Testing and Inspection
Oxygen Sensor and Oxygen Sensor Control In Center Catalytic Converter, Checking
Oxygen Sensor And Oxygen Sensor Control In Center Catalytic Converter, Checking (vehicles With Engine Code BBW)
NOTE:
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Vehicle must be raised before connector for oxygen sensor is accessible.
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When servicing terminals 3 and 4 in harness connector of Heated Oxygen Sensor (HO2S), use only gold-plated 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 kit
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Wiring diagram
Requirements
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The respective fuses of Oxygen Sensor (O2S) in Center Three Way Catalytic Converter (TWC), Bank 1 -G465- must be OK.
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Battery voltage must be at least 11.5 Volts.
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All electrical consumers such as, lights and rear window defroster 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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For vehicles with automatic transmission, selector lever must be in position -P- or -N-.
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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 degrees C, Diagnostic mode 1: Check measured values; PID 5, Coolant temperature. See: Testing and
Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 1: Check Measured Values
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Oxygen sensor heater for oxygen sensor in center catalytic converter must be OK, check. See: Oxygen Sensor Heater For Oxygen Sensor In Center
Catalytic Converter, Checking
Work sequence
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Select output of oxygen sensor signals and check whether specified values are being reached, Diagnostic mode 5: Check output of oxygen sensor
signals. See: Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 5: Check Output of Oxygen
Sensor Signals
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End diagnosis and switch ignition off.
If specified values are not obtained:
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Check primary voltage.
Checking primary voltage