Jetta Sedan L4-1.9L DSL Turbo (BEW) (2005)
Oxygen Sensor: Testing and Inspection
Oxygen Sensor And Oxygen Sensor Control, Checking
Oxygen Sensor And Oxygen Sensor Control, Checking
Only vehicles with engine code BEW
NOTE:
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Vehicle must be raised before connector for oxygen sensor is accessible.
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When servicing terminals in harness connector of oxygen sensor, use only gold-plated terminals.
Recommended special tools and equipment
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V.A.G1526 multimeter or V.A.G1715 multimeter
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V.A.G1594 connector test kit
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Wiring diagram
Test requirements
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The respective fuses of Diesel-Direct fuel injection system 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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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 must be OK, check.
Checking primary voltage
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Disconnect 6-pin harness connector to Heated Oxygen Sensor (HO2S) -G39-. Harness connector of oxygen sensor is located at vehicle floor under
a synthetic cover.
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Connect multimeter to terminals 2 + 6 of connector to control module for Diesel-Direct fuel injection system for voltage measurement.
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Switch on ignition and measure primary voltage.