Current Draw, Checking
Special tools and workshop equipment required
- Trim Removal Wedge: 3409
- Vehicle Diagnostic Tester - Test Adapter - 5 Pin: VAS5565
- Pickup Clamp such as Pickup Clamp: VAG1526B/2
-- Remove the bench seat. Refer to BENCH SEAT/SINGLE SEAT, REMOVING AND INSTALLING .
-- If equipped, remove the cover -1- and Fuel Pump Control Module -J538- -2- from the fuel delivery unit.
-- Unclip the cover -1- at the tabs in direction of -arrows- using the : 3409 .
-- Pull on the connector -arrow- without pressing the release to make sure the connection is secure.
-- If the connector was not connected correctly, it could cause a fault.
-- Disconnect the connector -arrow-.
-- Check the contacts on the connector and on the fuel delivery unit for damage.
-- Attach the : VAS5565 to the connector and to the fuel delivery unit.
-- Connect the current probe -A- to the red cable labeled "current probe" for the : VAS5565 .
-- Start the engine and let it run at idle.
-- Measure the current draw of the fuel pump.
- Specified value: maximum 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 required 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, REMOVING AND INSTALLING and inspect it for debris.
-- Check the fuel pressure. Refer to FUEL PRESSURE, CHECKING .
If the Current Draw Is Exceeded:
-- If the fuel pump is faulty, replace the fuel delivery unit. Refer to FUEL DELIVERY UNIT/FUEL LEVEL SENSOR, REMOVING AND INSTALLING .