Jetta Sedan L5-2.5L (BGP) (2005)
‹› All electrical consumers such as, lights and rear window defroster, switched off.
‹› A/C switched off.
‹› Ground (GND) connections between engine/transmission/chassis OK.
‹› Ignition switched off.
Test procedure
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Perform a preliminary check to verify the customers complaint. Refer to --> [ Engine Control Module, Replacing ] .
Start diagnosis
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Remove the right underbody trim- arrows -.
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Disconnect the Oxygen Sensor (O2S (in Center Three Way Catalytic Converter (TWC), Bank 1 (G465) electrical harness connector - 1 -.
Checking internal resistance
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Using a multimeter, check the Oxygen Sensor (O2S (in Center Three Way Catalytic Converter (TWC), Bank 1 (G465) electrical harness connector
terminals 1 to 2 for resistance.