Jetta L4-1.8L Turbo (AWP) (2004)
Oxygen Sensor: Testing and Inspection
Functions, Checking
With Manufacturer's Scan Tool
Refer to Oxygen Sensor And 02 Sensor Before (TWC), Checking, With Manufacturer's Scan Tool.
See: Testing and Inspection/Component Tests and General Diagnostics/Oxygen Sensor, Checking/Oxygen Sensor Before Catalyst, Checking/Sensor and
Sensor Control Check/With Manufacturer's Scan Tool
With Generic Scan Tool
Oxygen Sensor Heater For Oxygen Sensor Before Three Way Catalytic Converter (TWC), Checking
NOTE: When servicing terminals in harness connector of Heated Oxygen Sensor (HO2S), use only gold-plated terminals.
Recommended special tools and equipment
-
VAG1526 multimeter or VAG1715 multimeter
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VAG1594 connector test kit
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Wiring diagram
Test requirements
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The respective fuses of Heated Oxygen Sensor (HO2S) -G39- must be OK.
-
Ignition switched off.
Vehicles with engine code AWD
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Unscrew protective cover (arrows) and disconnect 4-pin harness connector (black) -1- to Heated Oxygen Sensor (HO2S) -G39- before catalytic
converter.