Eos (1F7) L4-2.0L Turbo (BPY) (2007)
If the specification was not obtained:
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Replace the Heated Oxygen Sensor (HO2S) (G39).
If the specification is obtained:
Checking voltage supply
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Using a multimeter, check the Heated Oxygen Sensor (HO2S) (G39) electrical harness connector terminal 4 to the Engine Component Power
Supply Relay ( J757) terminal 2 for voltage.
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 105 Pin (VAG1598/42).
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). Refer to => [ Engine Control Module J623, Removing and Installing ] See:
Computers and Control Systems/Engine Control Module/Service and Repair/Engine Control Module J623, Removing and Installing.
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Using a multimeter, check the Heated Oxygen Sensor (HO2S) (G39) electrical harness connector terminal 3 to the Motronic Engine Control
Module (ECM) ( J623) electrical harness connector T94 terminal 51 for an open circuit.