Touareg 2003 ➤
8-cylinder injection engine - Edition 11.2011
1.11.1
Checking delivery quantity of right pump
– Connect remote control -V.A.G 1348/3 A- with adapter cable
- Phaeton -V.A.G 1348/3-3- to connection -arrow- of fuel pump
relay for right fuel delivery unit.
– Connect positive terminal of remote control to positive pole in
engine compartment.
lk
– Disconnect fuel supply hose -1- from fuel rail.
– Hold hose in measuring container -2- with minimum capacity
3
of 1000 cm .
– Empty measuring container before making measurement.
3
–
Operate remote control for 15 seconds. At least 800 cm fuel
per 15 seconds must be delivered.
1.11.2
Checking delivery quantity of left pump
– Connect remote control -V.A.G 1348/3 A- with adapter cable
- Phaeton -V.A.G 1348/3-3- to connection -arrow- of fuel pump
relay for left fuel delivery unit.
– Empty measuring container before making measurement.
3
–
Operate remote control 15 seconds again. At least 800 cm
fuel per 15 seconds must be delivered.
– In addition, check both fuel delivery units.
– To do so, connect adapter cable - Phaeton -V.A.G 1348/3-3-
to connections of relays for left and right fuel delivery units.
– Empty measuring container before making measurement.
3
–
Operate remote control 10 seconds. At least 800 cm fuel per
10 seconds must be delivered.
If the minimum delivery rate is not attained during one of the tests:
– Check fuel lines for possible restrictions (kinks) or blockages.
If fuel lines are ok:
– Renew fuel filter.
If delivery rate has been attained, but nevertheless you suspect
a fuel supply system fault (e.g. intermittent failure of fuel supply
system):
– Check current draw of fuel pumps ⇒ page 109 .
1.11.3
Checking current draw of pumps
– Check current draw of each fuel pump separately as follows:
– Reconnect all disconnected fuel lines.
1. Parts of fuel supply system
109
English 