RS 4 Quattro Cabriolet V8-4.2L (BNS) (2008)
If the specified value was obtained:
Checking voltage
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Crank the engine.
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Using a Multimeter , check the Fuel Metering Valve N290 electrical harness connector terminal 1 to Ground (GND) for voltage.
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 Fuel Metering Valve N290 electrical harness connector terminal 1 to the Engine Component Power Supply Relay J757
socket 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 connections
If the manufacturers test box is being used. Perform the following step.
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Install the test box.
If the manufacturers test box is not being used. Perform the following step.
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Remove the Engine Control Module (ECM) J623.
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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.
Fuel Metering Valve N290
Engine Control Module (ECM)
electrical harness connector
J623 electrical connector T60
terminal
terminal or test box socket
2
19
Specified value: 1.5 Ohms Max.
If the specification was not obtained: