Leakage. Permanent Fault

Checking Vacuum To Canister Purge Valve
- Start the engine and idle it.
- Disconnect hose between canister purge (CP) valve and intake manifold from the canister purge valve.
- Is there a vacuum?

Yes:
^ Proceed to: Checking Vacuum Downstream Of The Canister Purge Valve section below.

No:
^ Check if the hose between the canister purge valve and intake manifold is blocked.
^ Check the hose connection to the intake manifold.
^ Proceed to: Verification section below.





Checking Vacuum Downstream Of The Canister Purge Valve
- Engine idling.
- Connect the hose between the canister purge valve and intake manifold to the canister purge valve.
- Disconnect the hose between the canister purge valve and EVAP canister from the canister purge valve.
- Check that there is no vacuum in the EVAP valve when the valve is not activated. Go into the scrolling values list to determine whether the EVAP canister purge valve is activated or not.

If reading is OK:
^ Proceed to: Checking Canister Purge Valve section below.

If reading is incorrect:
^ Try a new canister purge valve.
^ Proceed to: Verification section below.





Checking Canister Purge Valve
- Engine idling.
- Hose between the canister purge valve and EVAP canister disconnected at the canister purge valve.
- Check that there is vacuum in the canister purge valve when the valve is activated. The canister purge valve is activated within approx. one minute of the engine starting. Go into the scrolling values list to determine whether the canister purge valve is activated or not.

If reading is OK:
^ Proceed to: Checking Vacuum at EVAP Canister section below.

If reading is incorrect:
^ Try a new canister purge valve.
^ Proceed to: Verification section below.





Checking Vacuum at EVAP Canister
- Engine idling.
- Connect hose between canister purge valve and EVAP canister to canister purge valve.
- Disconnect hose between canister purge valve and EVAP canister from EVAP canister.
- Check that there is vacuum in the canister purge valve when the valve is activated. The canister purge valve is activated within approx. one minute of the engine starting. Go into the scrolling values list to determine whether the canister purge valve is activated or not.

If reading is OK:
^ Check that all the EVAP canister inlets and outlets are OK.
^ If they are all OK, the fault is intermittent, fault-trace.

If reading is incorrect:
^ Check if the hose between the canister purge valve and EVAP canister is blocked.
^ Proceed to: Verification section below.





Verification
After carrying out the repair, check that the fault has been remedied as follows:

- Ignition OFF.
- Reinstall all hoses/components.
- Erase diagnostic trouble codes (DTCs).
- Run the engine to operating temperature (above 70°C (158°F)).
- Air conditioning (A/C) OFF.
- Gear selector in P or N.
- Engine idling.
- Go into diagnostic test menu. Select EVAP diagnostic.
- Wait until the diagnostic is complete. This can take up to 2 minutes.
- Read off diagnostic trouble codes.

NOTE:
- If the texts START CONDITIONS NOT MET or DIAGNOSTIC INTERRUPTED are displayed the diagnostic cannot be carried out. This can have several causes: fuel trim is not active, engine load changes during the diagnostic, idling is unstable or a diagnostic trouble code has been stored after the diagnostic was activated.
- Check that no diagnostic trouble codes are stored. Restart the car and try to activate the diagnostic again. Sometimes several attempts will have to be made before the diagnostic is carried out.

- Does the diagnostic trouble code recur?

No:
^ Fault corrected.

Yes:
^ Proceed to: Fault-tracing Information section below.

Fault-tracing Information
The verification result shows that the fault persists.

- Do you want to exit fault-tracing?

Yes:
^ Fault not corrected.

No:
^ Proceed to: Checking Vacuum To Canister Purge Valve section above.