S5 Quattro Coupe V8-4.2L (CAUA) (2009)
If any of the specifications were not obtained:
-
Replace the Leak Detection Pump (LDP) (-V144-).
If the specified values were obtained:
Checking voltage supply
-
Using a Multimeter, check the Leak Detection Pump (LDP) (-V144-) electrical harness connector terminal 3 to Ground (GND) for voltage.
-
Operate the starter briefly.
Specified value: battery voltage.
-
Switch the ignition off.
If the specified value was not obtained:
-
Check the wiring connection from the Leak Detection Pump (LDP) (-V144-) electrical harness connector terminal 3 to the Engine Component
Power Supply Relay (J757) terminal 2/87 for an open circuit or short to ground (GND).