RS 4 Quattro Cabriolet V8-4.2L (BNS) (2008)
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Checking wiring connections
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 => [ Engine Control Module 1, Removing and Installing ] See: Computers and
Control Systems/Engine Control Module/Service and Repair/Engine Control Module 1, Removing and Installing.
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Using a multimeter, check the Fuel Metering Valve (N290) electrical harness connector terminal 2 to the Engine Control Module (ECM) (J623)
electrical harness connector T60 terminal 60 for an open circuit.
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), or an open circuit.
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If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring:
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Replace the Engine Control Module (ECM) (J623 ). Refer to => [ Engine Control Module 1, Removing and Installing ] See: Computers and
Control Systems/Engine Control Module/Service and Repair/Engine Control Module 1, Removing and Installing.
Final procedures
After the repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] See: Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 03 - Read DTC Memory.
2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] See: Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 04 - Erase DTC Memory.
3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] See: Computers and Control Systems/Testing and
Inspection/Monitors, Trips, Drive Cycles and Readiness Codes.
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End of diagnosis.
