With Manufacturer's Scan Tool
EVAP Canister Purge Regulator Valve -N80-, Checking
NOTE: With no power applied, the solenoid valve is normally closed.
Activation, checking [1][2]Output Diagnostic Test Mode (DTM), (Function 03)
Special tools
- V.A.G 1551/1552 Scan Tool
NOTE: The V.A.G 1552 Scan Tool can be used instead of the V.A.G 1551; however, a print-out is not possible.
- V.A.G 1551/3 adapter cable
Test conditions
- All fuses must be OK.
- Engine Coolant Temperature: 85°C minimum See display group 04, display zone 3
Function test
- Connect V.A.G 1551/1552 Scan Tool [1][2]Reading and Clearing Diagnostic Trouble Codes
- Start engine and let idle.
- Press 0 and 1 buttons to select Address word 01 "Engine electronics".
Display will appear as shown
Rapid data transfer HELP
Select function XX
- Press 0 and 8 buttons to select Function 08 "Read measuring value block".
- Press Q button to enter input.
Display will appear as shown
Read measuring value block
Input display group number XXX
- Press buttons 0, 7 and 0 to select "Display group 70".
- Press Q button to enter input.
Display will appear as shown (1 to 4 = Display zones)
Read measuring value block 70 ->
1 2 3 4
- Press 4 button to select Function 04: "Basic setting".
- Tank venting valve diagnostic will be initiated
NOTE: Engine must not be under load during this diagnosis because diagnosis will be interrupted and will not restart until engine is accelerated.
Display will appear as shown (1 to 4 = Display zones)
System in basic setting 70 ->
1 2 3 4
NOTE: When diagnosis is initiated by ECM, display in zone 4 changes from "Test OFF" to "Test ON"
- Run engine at idle until specification "TEV OK" is displayed in zone 4.
NOTE: If display changes from "Test ON" to "Test OFF" during test, briefly raise engine speed and test will repeat.
If the specification "TEV OK" is reached:
- Press -> button.
- Press 0 and 6 buttons to select Function 06 "End transfer".
- Press Q button to enter input.
- Switch OFF ignition.
If "TEV not OK" appears in display zone 4:
- Perform Output Diagnostic Test Mode and activate the EVAP canister purge regulator valve -N80-: [1][2]Output Diagnostic Test Mode (DTM), (Function 03)