TT Quattro Coupe V6-3.2L (CBRA) (2008)
Specified value: Battery voltage.
If the specification was not obtained:
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Check the Heated Oxygen Sensor (HO2S) (G39) electrical harness connector terminal 4 to the Fuel Pump (FP) 2 Relay (J49) socket 2/87 an open
circuit, a short circuit to each other, Battery (+), or Ground (GND).
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Check the electrical harness connector for damage, corrosion, loose 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. See: Powertrain Management/Computers and Control Systems/Engine Control Module/Testing and Inspection/Engine Control
Module
If the manufacturers test box is not being used. Perform the following step.
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Remove the Engine Control Module (ECM) (J623). Refer to => [ Engine Control Module, Replacing ] See: Powertrain Management/Computers
and Control Systems/Engine Control Module/Testing and Inspection/Engine Control Module.
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Using a multimeter, check the Heated Oxygen Sensor (HO2S) electrical harness connector to the Engine Control Module (ECM) (J623) electrical
harness connector T81 for resistance.