RS 4 Quattro Cabriolet V8-4.2L (BNS) (2008)
Fuel Pressure Sensor/Switch: Testing and Inspection
Low Fuel Pressure Sensor, Checking
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Wiring diagram.
Test requirements
‹› The Fuel Pump (FP) Control Module (J538) OK.
‹› The Engine Control Module (ECM) ( J623) fuses OK.
‹› The fuel filter OK.
‹› The battery voltage at least 12.5 V.
‹› All electrical consumers switched off (radiator fan must NOT run during test).
‹› A/C switched off.
‹› The fuel tank at least 1/4 filled.
‹› The ignition switched off.
Test procedure
-
Perform a preliminary check to verify the customers complaint. Refer to => [ General Diagnosis ] See: Computers and Control Systems/Testing
and Inspection/Initial Inspection and Diagnostic Overview/General Diagnosis.
Start diagnosis
-
Remove the rear engine cover - arrows -.
Checking voltage
-
Disconnect the Low Fuel Pressure Sensor (G410 ) connector.
-
Switch the ignition on.
-
Using a multimeter, check the Low Fuel Pressure Sensor (G410) electrical harness connector for voltage.