Jetta L4-1.8L Turbo (AWP) (2004)
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Set multimeter to check resistance and connect it to contacts 1 + 2 of oxygen sensor connector. Check oxygen sensor heating for continuity.
If it is determined that oxygen sensor heating has an open circuit:
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Replace the Oxygen Sensor (O2S) behind Three Way Catalytic Converter (TWC) (G130).
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Check DTC Memory, if necessary, repair any malfunctions and then Erase DTC Memory. Refer to "Displaying and Reading Trouble Codes/With
Manufacturer's Scan Tool/Check DTC Memory (Function 02)" See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Reading Diagnostic Trouble Codes/With Manufacturer's Scan Tool/DTC Memory
Checking and Erasing/Check DTC Memory (Function 02)
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Read readiness code. If DTC memory has been erased or engine control module was disconnected from permanent positive, readiness code must
be generated again: Refer to "Monitors, Trips and/or Drive Cycle (Readiness Codes)/With Manufacturer's Scan Tool/Displaying and Creating
Readiness Codes/Readiness Code, Reading" See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors,
Trips, Drive Cycles and Readiness Codes
Engine code AWP, Refer to "Monitors, Trips and/or Drive Cycle (Readiness Codes)/With Manufacturer's Scan Tool/Displaying and Creating
Readiness Codes/ Readiness Code, Generating" See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors,
Trips, Drive Cycles and Readiness Codes
If oxygen sensor heating has continuity:
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Set multimeter to measure voltage and connect to contact 1 (connector to engine control module) and Ground (GND).
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Start engine and run at idling speed.
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Check voltage supply:
Specification: 11.0 to 14.5 V
If no voltage is present:
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Check wiring from contact 1 to fuel pump relay (J17) according to wiring diagram.