Outline Of Diagnosis

Detect the malfunction of tank pressure sensor output property.

Judge NG when there is little variation in the fuel tank pressure even if the vehicle is in driving status where there must be variation in the fuel tank pressure considering the fuel temperature and fuel level.

Fig 1: Fuel Temperature Graph

Courtesy of SUBARU OF AMERICA, INC.

• If NG condition (a) & (b) are experienced, NG results.

  (If there is OK, NG experience becomes unexperienced.)

• If OK conditions (a) & (b) are experienced, OK results.

  (If there is NG, OK experience becomes unexperienced.)