Checking oil pressure and oil pressure switch F1 — AUDI

Checking oil pressure and
oil pressure switch
F1
Special tools and workshop equipment required
Oil pressure tester
V.A.G 1342
with
adapter
V.A.G 1342/14
Voltage tester
V.A.G 1527 B
Auxiliary measuring set
V.A.G 1594 C
Procedure
Oil level OK
Engine oil temperature approx. 80 °C
Oil pressure warning lamp
K3
should come on when ignition is switched on.
On vehicles with driver information system (DIS), the display
“OK”
should light up.
Remove engine cover
arrows
and cover in front of intake manifold.
Remove covers
1
and
2
at lock carrier (left-side) and above battery
arrows
.
Remove cover
1
(right-side) on lock carrier
arrows
.
Note
Disregard
item 2
.
Vehicles with exhaust temperature control:
Unplug electrical connector
arrow
at
exhaust gas temperature sender 1
G235
.
All models:
Remove bolts
2
and
3
and detach retaining plate
4
from dipstick guide tube.
Disengage coolant hose
1
from retaining plate.
Move retaining plate to the side (hoses remain connected).
Checking oil pressure switch
Unplug electrical connector at
oil pressure switch
F1
.
Unscrew
oil pressure switch
F1
.
Connect
oil pressure tester
V.A.G 1342
with
adapter
V.A.G 1342/14
to bore for oil pressure switch.
Screw oil pressure switch
2
into
oil pressure tester
V.A.G 1342
.
Connect brown wire
1
of oil pressure tester to earth (
“–”
).
Connect
voltage tester
V.A.G 1527 B
with test leads from
auxiliary measuring set
V.A.G 1594 C
to oil pressure switch and battery positive (
“+”
).
LED should not light up.
If the LED lights up:
Renew oil pressure switch.
Start engine.
Note
Observe tester and LED while starting, as switching point of oil pressure switch may already be exceeded when starting.
LED should light up at 1.2 ... 1.6 bar.
If LED does not light up:
Renew oil pressure switch.
Checking oil pressure
Start engine.
Minimum oil pressure at idling speed: 1.3 bar
Minimum oil pressure at 3500 rpm: 3.5 ... 4.5 bar.
The pressure relief valve or oil pump is defective if the specifications are not attained.
Renew oil pump
Chapter
.
Assembling
Installation is carried out in the reverse order; note the following:
Note
Renew seal for oil pressure switch.
Tightening torque
Component
Nm
Oil pressure switch to oil filter bracket
25