RS 4 Quattro Cabriolet V8-4.2L (BNS) (2008)
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 from the Intake Manifold Runner Control (IMRC) Valve (N316) electrical harness connector terminal 1 to the Engine
Component Power Supply Relay (J757) terminal 2/87 for a short circuit to Ground (GND), or an open circuit.
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Check the electrical harness connector for damage, corrosion, lose or broken terminals.
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If necessary, repair the wiring connection.
If no malfunctions are found in 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 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 Motronic 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 Intake Manifold Runner Control (IMRC) Valve (N316) electrical harness connector terminal 2 to the Engine
Control Module (ECM) (J623) electrical harness connector T60 terminal 35 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).
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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 no malfunction is detected in the wiring:
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Replace the Motronic 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.