Outline Of Diagnosis

Detect the open or short circuit of crankshaft position sensor.

Normally, the crankshaft position sensor signal and camshaft position sensor signal are input as shown below. But judge NG when continuing not to input the crankshaft position sensor signal.

Fig 1: Crankshaft Position Sensor Graph

Courtesy of SUBARU OF AMERICA, INC.

• Cylinder judgment method

  When inputting BTDC97°CA crankshaft position sensor signal, judge what cylinder piston is brought to the top dead center of compression by camshaft position sensor signal number.

  Fig 2: Camshaft Position Sensor Signal Table

  Courtesy of SUBARU OF AMERICA, INC.