Checking active charcoal filter system solenoid valve 1 N80 — VW

Checking
active charcoal filter system solenoid valve 1
N80
Active charcoal filter system solenoid valve 1
N80
remains closed when it is not receiving any current.
Checking activation:
Rep. Gr.
01
Final control diagnosis
.
Special tools and workshop equipment required
Fault reader
V.A.G 1551
or
vehicle system tester
V.A.G 1552
Diagnostic cable
V.A.G 1551/3C
Note
Vehicle system tester
V.A.G 1552
can be used instead of fault reader
V.A.G 1551
, however a print-out is not possible.
Test prerequisites
Coolant temperature must be at least 80 °C, ⇒ display group 04, display zone 3.
Fuse 43 must be OK.
Functional check
Connect
fault reader
V.A.G 1551
or
vehicle system tester
V.A.G 1552
. Start engine and select
“address word 01”
of engine control unit. Connect fault reader and select engine control unit
Rep. Gr.
01
.
Indicated on display:
Rapid data transfer HELP
Select function XX
Press buttons
0
and
4
for function
“Initiate basic settings”
and confirm entry with
Q
button.
Indicated on display:
Basic setting
Input display group number XXX
Press buttons
0
,
7
and
0
for
“Display group number 70”
and confirm entry with
Q
button.
Note
Do not load engine during this diagnosis, otherwise diagnosis will be terminated and can only be initiated again by a burst of the throttle.
Indicated on display: (1...4 = display zones)
System in basic setting 70 ->
1 2 3 4
When diagnosis of engine control unit is initiated, display in display zone 4 jumps from
“Test OFF”
to
“Test ON”
.
Allow engine to continue to run at idling speed until the result of the brief test is displayed in display zone 4: Specification
“TBV OK”
Note
TBV is abbreviation for: tank breather valve (
activated charcoal filter solenoid valve 1
N80
).
When display jumps from
“Test ON”
to
“Test OFF”
during test, initiate test again with a burst on the throttle.
When
“TBV n.OK”
is display in display zone 4:
Initiate final control diagnosis and activate
active charcoal filter system solenoid valve 1
N80
:
Rep. Gr.
01
Final control diagnosis
.
If specification
“TBV OK”
is attained:
Press the
→
button.
Indicated on display:
Rapid data transfer HELP
Select function XX
Press buttons
0
and
6
for function
“End data transfer”
and confirm entry with
Q
button.
Switch off ignition.