Flow Fault - Permanent

ECM-4019 EVAP CANISTER SHUT-OFF VALVE CLOSED
FLOW FAULT, PERMANENT

Checking fuel tank pressure sensor



- Open the fuel tank filler cap.
- Start the engine and let it idle.

Read fuel tank pressure

Hint: Fuel tank pressure must be higher than -1000 Pa. The normal value is approximately 0 Pa.

Is the fuel tank pressure OK?
Yes - Continue to "Checking canister purge (CP) valve"
No - Continue to "Verification"


Checking canister purge (CP) valve



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

Read canister purge (CP) valve pulse signal. There should not be vacuum in the canister purge (CP) valve when the pulse signal is 0%.

Other information
- Location of components, Locations
- To access/replace the canister purge (CP) valve, Canister Purge (CP) Valve, Replacing

Is the value correct?
Yes - Continue to "Checking hoses"
No - Continue to "Verification"


Checking hoses



Check that EVAP canister shut-off valve is not blocked.
Check that EVAP canister shut-off valve filter is not blocked.
Check hose between EVAP canister and EVAP canister shut-off valve and hose between EVAP canister shut-off valve and filter for blockage or restriction.
Check EVAP canister shut-off valve terminal in EVAP canister for blockage.

Remedy as necessary.


Verification



Hint: After carrying out the repair, check that the fault has been remedied.
- Start the engine.

Activate the quick fuel tank system test.

Is the value OK?
Yes - Testing Complete.
No - Continue below.


Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed. Exit fault tracing for this diagnostic trouble code (DTC) or make another attempt.