Faulty Signal. Permanent Fault
Faulty signal. Permanent fault
Checking air flow
- Expose the canister purge (CP) valve
- Remove the hose from the canister purge (CP) valve to the EVAP canister
- Ignition on.
Activate the canister purge (CP) valve by clicking on the VCT-2000 symbol.
Check that the connection with the intake manifold opens and closes when the canister purge (CP) valve opens and closes: Blow into the exposed terminal in the canister purge (CP) valve.
Note! A certain resistance will be felt because of the non-return valve.
If necessary, remedy the hoses / hoses connections for the intake manifold.
Replace the non-return valves or canister purge (CP) valve if necessary.
- To access the canister purge (CP) valve, see Replacing the canister purge (CP) valve Service and Repair
- To connect the breakout box, see Connecting the breakout box. EMS 2000 Connecting The Breakout Box. EMS 2000
- For information about signals, see Signal specification Signal Specification.
Was a fault detected?
Yes - Verification
No - Checking hoses
-------------------------------------------------
Checking hoses
- Ignition off
- The fault may be due to blocked hoses or components between the canister purge (CP) valve and the fuel tank
- Expose the EVAP canister and the roll-over valve to check the evaporative emission (EVAP) system.
Check the evaporative emission (EVAP) system hoses, terminals and components for blockage according to Pressurizing the fuel tank system, check Testing and Inspection.
Remedy as necessary.
Continue - Verification
-------------------------------------------------
Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
Note! This test cannot be performed if there are diagnostic trouble codes (DTCs) stored in EMS2000.
- Reinstall the components, reconnect the connectors etc.
- Ignition on
- Check that no other diagnostic trouble codes (DTCs) are stored. If other diagnostic trouble codes (DTCs) are stored, these must be remedied and erased first.
Are any other diagnostic trouble codes (DTCs) stored?
Yes - Fault-tracing information:
No - Activating the leak diagnostic
------------------------
Activating the leak diagnostic
Hint: If the test does not launch, this could be because the evaporative emission system (EVAP) control has not been active above a certain level. The control must change the level between each quick test carried out. The level is reached by allowing the engine to idle for approximately 5 minutes.
- Start the engine. Allow the engine to idle.
Note! The engine must be idling throughout the test.
- Clicking the VCT2000 symbol to activate the leak diagnostic
- Wait until the engine coolant temperature (ECT) exceeds 60 °C
- Start the leak diagnostic. YES is displayed during leak diagnostics
- Wait until the leak diagnostic is complete. Leak diagnostic active NO and leak diagnostic complete YES is displayed when the leak diagnostic is complete.
Hint: The time taken for the diagnostic varies depending on the fault status of the fuel tank system. The diagnostic process may take up to 4 minutes.
- Read off the results of the leak diagnostic. The leak diagnostic results are read off automatically when the test has been correctly completed
- The OK status will be displayed if the control module has not detected any faults. The Not OK status, and a number from 1-8 will be displayed if the control module has detected any faults. To interpret these faults, see the status definitions below.
Note! The status types can be translated into diagnostic trouble codes (DTCs). However they are not stored as DTCs during this test.
- Click the stop button to re-run the test.
Status definitions:
- OK = The system is free of faults
- Not OK, status 1 = Leak diagnostic pump, signal too low. (ECM-65, signal too low)
- Not OK, status 2 = Leak diagnostic pump, signal too high. (ECM-65, signal too high)
- Not OK, status 3 = Leak diagnostic pump, faulty signal. (ECM-65, faulty signal)
- Not OK, status 4 = Leak diagnostic pump, blocked hose. (ECM-66, signal too low)
- Not OK, status 5 = Leakage 0.5 mm. (ECM-68, minor leak)
- Not OK, status 6 = Leakage 1 mm. (ECM-68, major leak)
- Not OK, status 7 = Leakage larger than 1 mm. (ECM-68, Fuel tank filler cap missing)
- Not OK, status 8 = Evaporative emission (EVAP) system blocked. (ECM-6A, signal too low).
Select a suitable alternative to continue:
1. The status is OK
2. Status Not OK (for the current diagnostic trouble code (DTC)) has been detected
3. Status Not OK, (for another diagnostic trouble code (DTC)) has been detected.
1 - VERIFIED
2 - VERIFICATION FAILED
3 - Fault-tracing information:
------------------------
Fault-tracing information:
- The control module has detected a fault other than the one that affects the relevant diagnostic trouble code (DTC). This may be because a fault occurred during the fault-tracing. Check that the hoses, connectors and components etc have been correctly reinstalled. Check that they are not damaged.
Continue - VERIFIED
------------------------
Fault-tracing information:
- This diagnostic trouble code (DTC) cannot be verified before other DTCs have been remedied and erased
- Fault-trace, remedy and erase other diagnostic trouble codes (DTCs) first. Then select this diagnostic trouble code (DTC) to perform verification.
Continue - VERIFICATION FAILED
------------------------
VERIFIED - FAULT FOUND
VERIFICATION FAILED - Fault-tracing information
-------------------------------------------------
Fault-tracing information
Information
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.
Do you want to exit fault-tracing?
Yes - Exit fault-tracing
No - Attempt New Test
------------------------
FAULT-TRACING FAILED - No Fault Found
Attempt New Test - Checking air flow
-------------------------------------------------