R8 Quattro Coupe V10-5.2L (BUJ) (2010)
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Check the wiring.
Checking internal resistance,Engine Control Module (ECM) 2 (J624)
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Disconnect the Data Bus On Board Diagnostic Interface (J533) electrical harness connector.
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Disconnect the Motronic Engine Control Module (ECM) (J623) electrical harness connector.
‹› The Engine Control Module (ECM) 2 (J624) must remain connected for the following step.
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Using a Multimeter, check the Data Bus On Board Diagnostic Interface (J533) electrical harness connector terminals T20/16 to T20/6 for
resistance.
Specified value: 60 to 72 ohms (at approx. 20° C)
If the specified value was not obtained:
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Check the wiring.
Checking wiring
If the manufacturers test box is being used, perform the following step.
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Install the test box. Refer to appropriate repair information.
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) or the Engine Control Module (ECM) 2 (J624). Refer to appropriate repair
information.
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Using a Multimeter, check the Data Bus On Board Diagnostic Interface (J533) electrical harness connector to the Motronic Engine Control
Module (ECM) (J623) electrical harness connector T94 or the Engine Control Module (ECM) 2 (J624) electrical harness connector T94a for
resistance.
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:
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Replace the Motronic Engine Control Module (ECM) (J623) or the Engine Control Module (ECM) 2 (J624). Refer to appropriate repair
information.
Final procedures
After repair work, the following work steps must be performed in the following sequence: