5. Checking the Vacuum Downstream of the (CP) Valve

ECM-4308 LEAK DIAGNOSTIC LARGE LEAK
LEAK DIAGNOSTIC

Checking the vacuum downstream of the canister purge (CP) valve



- Disconnect the hose between the canister purge (CP) valve and the EVAP canister from the canister purge (CP) valve.
- Start the engine and let it idle.

Hint: Listen to or feel the valve to ensure that it is not activated. The signal can be stopped and Read in the event of uncertainty. Feel with fingers or connect a vacuum gauge to the valve connection to determine whether there is leakage when the canister purge (CP) valve is off. There must not be any leakage.

Other information:
- To access/replace the canister purge (CP) valve, Canister Purge (CP) Valve, Replacing

Is the canister purge (CP) valve OK?
Yes - Continue below.
No - Skip to "Verification Information"


Checking the canister purge (CP) valve



Check the canister purge (CP) valve connector for dirt, damage and deposits.
Activate the canister purge (CP) valve to ensure that no function faults occur.
Check that the canister purge (CP) valve does not jam or stop functioning after it has been activated.


Verification information
Hint: After carrying out the check and the repair, check that the fault has been remedied.

Continue with "Starting the Quick Test" 2. Starting the Quick Test