Faulty Signal

Faulty signal

Checking components and connections




- The status of the valve can be determined by activating the quick test for the EVAP valve. The test sends pressure pulses through the valve so that the functionality of the valves can be checked.
The fault is permanent if a fault is detected in the evaporative emission system (EVAP) valve when running the quick test
- Engine idling during the entire test.
Activate the evaporative emission system (EVAP) valve quick test. The test takes a few seconds to carry out.
The tool displays the ranking value as a value between 0 and 255.
The functionality is poor if the value is 128 or higher. Check the hose/hose connectors between the evaporative emission system (EVAP) valve and canister. Check for damage, blockage or pinching. The valve may need to be cleaned or replaced.
The functionality is good if the value is below 128. If this is the case, check the hose/hose connectors between the EVAP valve and the intake manifold. Check for damage, blockage or pinching.
Note the read ranking value.
Remedy as necessary.

Other information
- Location of components Locations










Continue - Verification

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Verification




Verification

Verification

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








- Ignition off
- Reinstall the connectors, components etc.
- Restart the quick test of the EVAP valve and check the ranking values to establish if the work carried out has remedied the problem
- Engine idling during the entire test.
Activate the evaporative emission system (EVAP) valve quick test. The test takes a few seconds to carry out.
Check that the ranking value is lower than 128, and that it is significantly lower than the previous value. A value below 128 indicates that the fault has been remedied and the function is OK.









Is the function OK?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - Fault Found

VERIFICATION FAILED - Fault-tracing information

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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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking components and connections

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