S5 Quattro Coupe V8-4.2L (CAUA) (2009)
-
Using a Multimeter , check the Fuel Metering Valve (N290) terminals 1 to 2 for resistance
Specified value: 450 to 1000 ohms.
If the specified value was not obtained:
-
Replace the Fuel Metering Valve (N290).
If the specified value was obtained:
Checking voltage
Crank the engine.
-
Using a Multimeter, check the Fuel Metering Valve (N290) electrical harness connector terminal 1 to Ground (GND) for voltage.
Specified value: battery voltage.
-
Switch the ignition off.
If the specified value was not obtained:
-
Check the wiring from the Fuel Metering Valve (N290) electrical harness connector terminal 1 to the Fuse (on fuse/relay panel) (S5) for an open
circuit or a short circuit to Ground (GND).
-
Check the electrical harness connector for damage, corrosion, loose or broken terminals.
-
If necessary, repair the wiring connection.