A4 Quattro Cabriolet V6-3.2L (BKH) (2007)
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Using a Multimeter, check the Brake Pedal Switch (F47) electrical harness connector terminal 3 to Ground (GND).
Specified value: battery voltage.
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Switch the ignition off.
If the specified value was not obtained:
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Check the wiring.
If the specified value was obtained:
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Replace the Brake Light Switch (F)/Brake Pedal Switch (F47).
Checking wiring
If the manufacturers test box is being used. Perform the following step.
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Install the test box. Refer to Fuel Injection and Ignition Repair Information.
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 => [ ECM, Removing and Installing ] See: Powertrain Management/Computers and
Control Systems/Engine Control Module/Service and Repair/ECM, Removing and Installing.
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Using a Multimeter, check the Brake Light Switch (F)/Brake Pedal Switch ( F47) electrical harness connector to the Engine Control Module
(ECM) (J623) electrical harness connector T94 for open an circuit.
Specified value: 1.5 ohms Max.
If the specified value was not obtained:
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Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
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Check the wiring connection 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 and voltage supply was not OK:
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Replace the Engine Control Module (ECM) (J623 ). Refer to => [ ECM, Removing and Installing ] See: Powertrain Management/Computers and