Malfunction Threshold

One of these symptoms occurs:

• Symptom 1 

  The return signal does not change according to the EVAP canister purge valve output for at least 1.5 seconds.

• Symptom 2 

  When the return signal is fully opened and continues for at least 2.0 seconds while the EVAP canister purge valve output is 0 % (totally closed).

• Symptom 3 

  When the return signal is fully closed and continues for at least 2.0 seconds while the EVAP canister purge valve output is 100 % (totally opened).