Current Draw, Checking

WARNING: This page is about a different car, the 2010 Volkswagen Jetta, 2009 Volkswagen Jetta, 2009 Volkswagen GLI, 2008 Volkswagen Jetta, and 2008 Volkswagen GLI. However, it is still accessible from the selected car via links, so may be relevant.

-- Remove the rear bench seat. Refer to Removal and Installation .

-- Remove the cover -2- and fuel pump control module -J538- -2- from the fuel delivery unit.

Fig 1: Identifying Cover With Fuel Pump Control Module J538

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- First, pull on the connector -arrow- without pressing the retainer to make sure it is connected securely. If the connector was not connected correctly, it could cause a fault.

Fig 2: Fuel Pump Control Module Connector

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Disconnect the connector -arrow-.

-- Check the contacts on the connector and the fuel delivery unit for damage.

-- Install the test instrument adapter/DSO (5-pin) VAS 5565 between the connectors on the fuel delivery unit and cover.

Fig 3: Connecting Current Clamp To Red Wire On Test Instrument Adapter/DSO (5-Pin) VAS 5565

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Connect the current clamp -A- to the red wire on the test instrument adapter/DSO (5-pin) VAS 5565 with the words "current clamp" on it.

-- Start the engine and run at idle speed.

-- Measure the current draw of the fuel pump.

Specified value: Max. 9 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 needed to do this.

If the current draw is exceeded:

-- The fuel pump is faulty, replace fuel delivery unit. Refer to FUEL DELIVERY UNIT .