GTI L4-2.0L Turbo (BPY) (2007)
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Using a multimeter, check the Heated Oxygen Sensor (HO2S) G39 electrical harness connector -1 - 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 is obtained:
Checking wiring
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.
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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) J623 electrical harness connector T94 terminals for an open circuit.
Heated Oxygen Sensor (HO2S)
Motronic Engine Control Module (ECM)
G39 electrical harness
J623 electrical connector T94
connector terminals
terminals or test box sockets
1
60
2
61
5
81
6
82
Specified value: 1.5 Ohms Max.
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 no malfunction is found in the wiring:
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Replace the Motronic Engine Control Module (ECM) J623.
Final procedures