Current Draw, Checking

WARNING: This page is about a different variant/trim than selected.

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

-- Remove the cover -1- and the fuel pump control module -J538- -2- from the fuel delivery unit.

Fig 1: Identifying Cover With Fuel Pump Control Module J538

Courtesy of VOLKSWAGEN UNITED STATES, 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 UNITED STATES, INC.

-- Disconnect the connector.

-- 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 cover and the fuel delivery unit.

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

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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

-- Replace the fuel delivery unit, the fuel pump is faulty. Refer to FUEL DELIVERY UNIT .