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Home >> Subaru >> 2017 >> Impreza Base, 4D Sedan, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics - Introduction) >> Inspection Mode >> Procedure >> Inspection Mode C >> Diagnostic procedure
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Diagnostic procedure

  1. Check that the battery voltage is 12 V or more and fuel remains approx. half [20 - 40 L (5.3 - 10.6 US gal, 4.4 - 8.8 Imp gal)].
  2. Using the Subaru Select Monitor, clear the memory of [Engine Control System].
  3. Execute the inspection mode. Ref. to ENGINE (DIAGNOSTICS) >Inspection Mode .
    NOTE: Perform the inspection mode after warming up the engine except when the engine coolant temperature at engine start is specified.
  4. Drive according to the drive pattern described below.
    Fig 1: Drive Pattern
    G11257268Courtesy of SUBARU OF AMERICA, INC.
  5. Read the readiness code of [Engine Control System] using Subaru Select Monitor and check that the concerned DTC is completed. Ref. to ENGINE (DIAGNOSTICS) >All Readiness Diagnostic Code(s) .
  6. Read the DTC of [Engine Control System] using the Subaru Select Monitor. Ref. to ENGINE (DIAGNOSTICS) >Diagnostic Trouble Code (DTC) .
  7. Read the temporary code using the Subaru Select Monitor or general scan tool.
NOTE: After driving, use the Subaru Select Monitor to check that "Imbalance Check 3 R" indicates "1" and read the temporary code. If "Imbalance Check 3 R" indicates "0", the diagnosis has not been completed. In this case, repeat driving until the reading is "1".
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