Vehicles with Engine Codes CBTA, CBUA, CCCA:

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-- Remove the cover -1- from the fuel delivery unit. The arrow -2- points in the direction of travel.

Continuation for All Other Vehicles:

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-- Remove the cover -1- with the Fuel Pump Control Module -J538- -2- from the fuel delivery unit.

Continuation for All Vehicles:

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-- Pull on the connector -1- without pressing the release to make sure the connection is secure. If the connector was not connected correctly, it could cause a malfunction.

-- Remove the connector -1-.

-- 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.

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-- 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

NOTE:

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 .

-- Replace the fuel delivery unit. Refer to FUEL DELIVERY UNIT/FUEL LEVEL SENSOR, REMOVING AND INSTALLING .