Outline Of Diagnosis

Detect output characteristics malfunction of the pressure sensor in the leak check valve assembly.
Diagnosis 1 (at ignition switch ON): Judge as NG when the pressure sensor output value in the leak check valve assembly is largely different from the intake manifold pressure when the ignition switch is ON.
Diagnosis 2 (during Auto Start Stop): Judge as NG when the pressure sensor output value in the leak check valve assembly is largely different from the intake manifold pressure.