Jetta Sedan L5-2.5L (BGP) (2005)
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Using a multimeter, check the Heated Oxygen Sensor (HO2S) (G39) electrical harness connector terminals 1 to 5 for voltage.
Specified value: 0.400 to 0.500 Volts
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Switch the ignition off.
If the specified value was obtained:
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Replace the Heated Oxygen Sensor (HO2S) (G39).
If the specified value was not obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following step.
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Install the Adapter Cable (121-pin) (VAG1598/31)24 Removal and Installation.
If the manufacturers test box is not being used. Perform the following step.
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Remove the Motronic Engine Control Module (ECM) (J220). Refer to --> [ Engine Control Module, Replacing ] .
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Using a Multimeter, check the Heated Oxygen Sensor (HO2S) (G39) electrical harness connector terminals to the Motronic Engine Control
Module (ECM) (J220) electrical harness connector T121 terminals for resistance.