Purpose of Mode Z

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When performing the leakage diagnosis of EVAP system, CPC has to operate normally. Therefore, mode Z is used to diagnose the CPC open fixation.

If the CPC open fixation trouble is detected, the EVAP system leakage diagnosis is cancelled.

Fig 1: Identifying Purge Control Solenoid Valve CPC Close Malfunction Diagnosis - Mode Z

Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Identifying Purge Control Solenoid Valve

Courtesy of SUBARU OF AMERICA, INC.