Passat Wagon 4Motion V6-2.8L (ATQ) (2003)
Canister Purge Control Valve: Testing and Inspection
With Manufacturer's Scan Tool
EVAP Canister Purge Regulator Valve 1 -N80-, Checking
In a no-current situation the EVAP canister purge valve is closed.
Checking activation:
Special tools and equipment
-
VAG1551 or VAG1552 scan tool with VAG1551/3 adapter cable
Test conditions
-
Engine coolant temperature at least 85°C (185°F)
-
Fuse 29 OK.
Functional check
-
Connect VAG1551/VAG1552 Scan Tool ST) and press buttons -0- and -1- to select "Engine Electronics" address word 01 (engine running at
idle).
Indicated on display
Rapid data transfer
Help
Select function XX
-
Press keys 0 and 8 for "Read measuring value block" function and confirm entry with Q key.
Indicated on display
Read measured value block
Input display group number XXX
-
Press keys 0, 7 and 0 for "Display group number 70" and confirm entry with Q key.
Indicated on display (1-4 = Display fields)
Read measured value block 70
->
1
2
3
4
-
Press button 4 for "Basic Setting" function ("Tank venting valve diagnosis" will be initiated)
Note: The engine must not be loaded during this diagnostic because the diagnostic will be interrupted and will not be started again until the engine is
revved-up.
If "TVV not OK" appears in display zone 4:
Indicated on display (1-4 = Display fields)
System in basic setting 70
->
1
2
3
4
-
When the diagnostic is initiated by the engine control module, the display in display field 4 jumps from "Test OFF" to "Test ON"
-
Run engine at idling speed until specification "TVV OK" is displayed in display field 4.