Current Draw, Checking
Special tools and workshop equipment required
- Trim Removal Wedge3409
- Analog/Digital MultimeterFLU83III
- Pickup ClampVAG1526B/2
- Vehicle Diagnostic Tester - Test Adapter - 5 PinVAS5565
The coupling must audibly engage when locking.
Note the color coding when installing the coupling, refer to Coupling Allocation !
Pull on the coupling to make sure it is secure.
Disconnecting the coupling, refer to COUPLING, DISCONNECTING .
-- Remove the rear seat bench, refer to "Rear Seats" in Removal and Installation .
-- Remove the carpet and fold it upward.
-- Remove the right cover and the fuel pump control module -2- from the opening above the fuel delivery unit.
-- Remove the right cover -1- using the Trim Removal Wedge3409 at the tabs -arrows-.
-- Disconnect the connector -1- from the flange -3-.
-- Check the contacts on the connector and on the fuel delivery unit for damage.
-- Install the Vehicle Diagnostic Tester - Test Adapter - 5 Pin VAS5565 between the connectors on the fuel delivery unit and cover.
-- Connect the current probe -A- to the red cable labeled "current probe" on the Vehicle Diagnostic Tester - Test Adapter - 5 Pin VAS5565.
-- Start the engine and let it run in idle.
-- Measure the current draw of fuel pump.
- Specified value: MAX. 10 amps.
The fuel pump starting current may be higher than the specified value briefly when starting the engine.
If the malfunction in the fuel system only occurs sporadically, the test can also be performed during a road test. A second person is needed to do this.
If the current draw is exceeded:
-- Check the fuel lines for possible restrictions (kinks) or blockages.
-- Remove the fuel delivery unit, refer to FUEL DELIVERY UNIT/FUEL LEVEL SENSOR and inspect it for debris.
-- Check the fuel pressure, refer to FUEL PRESSURE, CHECKING .
If the specification is not obtained:
-- Replace the fuel delivery unit, refer to FUEL DELIVERY UNIT/FUEL LEVEL SENSOR .