EVAP Canister Purge Regulator Valve 1 -N80-, Checking

EVAP Canister Purge Regulator Valve 1 -N80-, Checking

In a no-current situation the solenoid valve is closed.

Special tools and equipment
- V.A.G 1551 Scan Tool or vehicle system tester V.A.G 1552 with cable V.A.G 1551/3

Checking conditions
- Coolant temperature at least 80 °C







- Fuse 29 must be OK.

Functional check
- Connect V.A.G 1551 (V.A.G 1552). Start engine and select engine control module with the "Address word" 01.


Indicated on display


Rapid data transfer HELP
Select function XX

- Press -0- and -8- buttons to select "Read measured value block" function and confirm entry with -Q- button.


Indicated on display


Read Measuring Value Block HELP
Input display group number XXX


- Press -0-, -7- and -0- buttons to select "Display group number 70" and confirm entry with -Q- buttons.


Indicated on display (1 to 4 Display fields)


Read Measuring Value Block 70 ->
1 2 3 4

- Press button -4- to select "Basic setting" function ("Tank venting valve diagnosis" will be initiated).

NOTE: The engine must not be loaded during this diagnosis because the diagnosis will be interrupted and will not be started again until the engine is rewed-up.


Indicated on display (1-4 = display fields)


System in basic setting 70 ->
1 2 3 4


When the diagnosis is initiated by the engine control module, the display in display field 4 jumps from "Test OFF" to "Test ON".

- Allow engine to run at idling speed until specification "TVV OK" appears in display field 4.

NOTE: If the display jumps from "Test ON" to "Test OFF" during the test, rev up briefly and the test will be repeated.

If "TVV not OK" appears in display field 4:
- Initiate Output Diagnostic Test Mode (DTM) and activate EVAP canister purge regulator valve 1 -N80-.

If the specification "TVV OK" is obtained:

- Press -> button.

Indicated on display

Rapid data transfer HELP
Select function XX


- Press -0- and -6- buttons to select "End data transfer" function and confirm input with the -Q- button.