GTI L4-2.0L Turbo (BPY) (2007)
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Disconnect the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 electrical harness connector -arrow-.
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Using a multimeter, check the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 electrical harness connector terminals 1
to 2 for resistance.
Specified value: 1.0 to 20.0 Ohms (at approx. 20 degrees C)
If the specification was not obtained:
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Replace the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130.
If the specification was obtained:
Checking voltage supply
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Using a multimeter, check the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 electrical harness connector terminal 1
to Engine Component Power Supply Relay J757 terminal 2 for an open circuit.
Oxygen Sensor (O2S) Behind
Engine Component Power Supply
Three Way Catalytic Converter
Relay J757 electrical harness
(TWC) G130 electrical harness
connector terminal
connector terminal
1
2
Specified value: Battery voltage.
If the specification was not obtained:
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Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
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Check the electrical harness connector for damage, corrosion, lose or broken terminals.
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If necessary, repair the faulty wiring connection.
If the specification was obtained:
Checking Ground (GND) activation
If the manufacturers test box is being used. Perform the following step.
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Install the test box.
If the manufacturers test box is not being used. Perform the following step.
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Remove the Motronic Engine Control Module (ECM) J623.