Removing and installing pressure differential sender G505 or pressure differential sender 2 G524 — AUDI

Removing and installing
pressure differential sender
G505
or
pressure differential sender 2
G524
The
pressure differential sender
G505
is connected to a take-off point upstream of the particulate filter (right-side, bank 1) via a pipe.
The second measuring line is approx. 7 cm in length and free to atmosphere (relative pressure sensor concept).
The
pressure differential sender
G505
detects the amount of deposits in the particulate filter (right-side).
The
pressure differential sender 2
G524
is connected to a take-off point upstream of the particulate filter (left-side, bank 2) via a pipe.
The second measuring line is approx. 7 cm in length and free to atmosphere (relative pressure sensor concept).
The
pressure differential sender 2
G524
detects the amount of deposits in the particulate filter (left-side).
Special tools and workshop equipment required
Engine and gearbox jack
V.A.G 1383 A
Gearbox support
T10337
Removing
Activate jacking mode
Rep. gr.
43
.
Remove engine cover panel
Chapter
.
Release hose clips
2
and
5
and disconnect air hoses.
Note
Disregard
items 1, 3, 4 and 6
.
Release fasteners and remove rear noise insulation panel
2
.
Remove left and right particulate filter
Rep. gr.
26
.
Unscrew bolts
arrows
connecting rear propshaft to transfer box.
Slide rear propshaft together towards rear final drive; the constant velocity joints can be moved axially.
Pressure differential sender 2
G524
(left-side):
Remove catalytic converter (left-side)
Rep. gr.
26
.
Pressure differential sender
G505
(right-side):
Remove front propshaft at transfer box
Rep. gr.
39
.
Remove catalytic converter (right-side)
Rep. gr.
26
.
Both sides (continued):
Support gearbox by positioning engine and gearbox jack
V.A.G 1383 A
(with
gearbox support
T10337
attached) underneath gearbox.
WARNING
Risk of accident.
Engine and gearbox jack
V.A.G 1383 A
must remain in position when work is being carried out and must not be left unattended.
Note
Disregard
items 1 and 2
.
Remove bolts
1
securing gearbox carrier.
Note
Disregard
items 2, 3 and 4
.
Lower
engine and gearbox jack
V.A.G 1383 A
as far as distance
a
.
Distance
a
= approx. 90 mm.
Pressure differential sender 2
G524
(left-side):
Unplug electrical connector
2
and remove nut
1
.
If hoses
4
are to be removed from pressure sensor, release hose clips (if fitted) and spray both hoses with silicone-free lubricant.
Pressure differential sender
G505
(right-side):
Unplug electrical connector
2
and remove nut
3
.
If hoses
4
are to be removed from pressure sensor, release hose clips (if fitted) and spray both hoses with silicone-free lubricant.
Both sides (continued):
Carefully disconnect the hoses from their connections (take care to keep the hoses straight: the connections on pressure sensor can break off easily).
Installing
Installation is carried out in the reverse order; note the following:
Tightening torque: exploded view - Lambda probes, exhaust gas temperature senders and pressure senders
Chapter
Note
Blow through hoses (towards particulate filter) with compressed air to remove dirt or ice (frozen condensation).
Make sure that hoses are securely fitted and that there are no leaks.
If pressure pipe has been released from particulate filter, tighten to 45 Nm.
Secure all hose connections with the correct type of hose clips (same as original equipment)
Parts catalogue
.
Fit all cable ties in the original positions when installing.
Install gearbox carrier
Rep. gr.
34
.
Install catalytic converter
Rep. gr.
26
.
Install front propshaft for transfer box
Rep. gr.
39
.
Secure rear propshaft to rear final drive
Rep. gr.
39
.
Install particulate filter
Rep. gr.
26
.
Install rear noise insulation
Rep. gr.
66
.
Deactivate jacking mode
Rep. gr.
43
.
If pressure differential sender or particulate filter has been renewed, perform adaption in
“Guided Fault Finding”
.
The procedure required after renewing a pressure differential sender is described in Guided Fault Finding or Guided Functions; use a
Vehicle diagnostic tester
.