Volkswagen Golf 2004 Workshop Manual page 196

Golf 2004 ➤ , Golf Plus 2005 ➤ , Passat 2006 ➤ , Touran 2003 ➤
4-cylinder diesel engine (2.0 l engine, 4 valve) - Edition 02.2011
– Connect hand-held multimeter -V.A.G 1526D- to contacts -1-
and -5- of adapter.
– Connect diagnosis tester and perform the guided function
„Checking electric fuel pump(s)".
Note
The fuel pump is now activated for 30 seconds.
– Read voltage value on hand-held multimeter -V.A.G 1526D- :
Specification = battery voltage.
If no voltage is present:
– Check activation of fuel pump relay and wiring for an open or
short circuit ⇒ Vehicle diagnostic tester.
Voltage supply OK:
– Remove fuel delivery unit
– Check that electrical wiring between flange and fuel pump is
connected and has continuity.
If no open circuit can be found:
– Renew fuel delivery unit.
4.8.4 Checking current draw of fuel pump
Special tools and workshop equipment required
♦ Hand-held multimeter -V.A.G 1526D- or pickup clamp -V.A.G
1526B/2-
♦ Test instrument adapter/DSO (5-pin) -VAS 5565-
♦ Vehicle diagnosis tester
Note
The battery voltage and the diesel fuel temperature have a great
influence on the current draw of the fuel pump. For this reason
ensure that the battery voltage is at least 12 V whilst checking and
the diesel fuel temperature does not fall to the freezing point.
Test prerequisites
• Battery voltage at least 12 V
• Diesel fuel temperature above 10 °C
– Remove seat bench ⇒ General body repairs, interior; Rep. gr.
72 ; Rear seats .
– Detach carpet under seats and fold it back. ⇒ General body
repairs, interior; Rep. gr. 70 ; Load and luggage compartment
trim; Removing and installing luggage compartment floor
– Remove cover from fuel delivery unit.
190
Rep. gr.20 - Fuel supply system
⇒ page 210