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Basic Diagnostic Procedure: Procedure

  1. CHECK PRE-INSPECTION  .
    1. Ask the customer when and how the trouble occurred using the interview check list. Ref. to TRANSMISSION (DIAGNOSTICS)>CHECK LIST FOR INTERVIEW .
    2. Before performing diagnostics, check the following items which might affect CVT problems.
      • General inspection Ref. to TRANSMISSION (DIAGNOSTICS)>General Description>INSPECTION .
      • Disconnection of harness connector
      • Visual check for harness damage
      • Oil leakage
      • Stall speed test Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>STALL TEST .
      • Secondary pressure test Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>SECONDARY PRESSURE (LINE PRESSURE) TEST .
      • Transfer clutch pressure test Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>TRANSFER CLUTCH PRESSURE TEST .
      • Time lag test Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>TIME LAG TEST .
      • Road test Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>ROAD TEST .
      • Inhibitor switch Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>INHIBITOR SWITCH .

    Is the check result OK?

    Yes:  Go to  2.

    No:  Repair the items which may be affecting the CVT trouble.

  2. CHECK AT OIL TEMP LIGHT  .

    Turn the ignition switch to ON and wait for at least 2 seconds.

    Does the AT OIL TEMP light illuminate?

    Yes:  Go to  3.

    No:  Check the AT OIL TEMP light.

  3. CHECK AT OIL TEMP LIGHT  .

    Start the engine and wait for 2 seconds or more.

    Does the AT OIL TEMP light blink?

    Yes:  Go to  4.

    No:  Go to  5.

  4. CHECK DTC  .

    Read the DTC using Subaru Select Monitor. Ref. to TRANSMISSION (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

    DTC Check 

    NOTE: If the communication function of Subaru Select Monitor cannot be executed normally, check the communication circuit. Ref. to TRANSMISSION (DIAGNOSTICS)>Diagnostic Procedure for Subaru Select Monitor Communication>COMMUNICATION FOR INITIALIZING IMPOSSIBLE .

    Are any DTCs displayed?

    Yes:  Record the DTC, time stamp and freeze frame data. Go to  6.

    No:  Go to  5.

  5. PERFORM GENERAL DIAGNOSTICS  .
    1. Inspect using "Diagnostic Procedure without Diagnostic Trouble Code (DTC)". Ref. to TRANSMISSION (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITHOUT DIAGNOSTIC TROUBLE CODE (DTC) .
    2. Inspect using "Diagnostics with Phenomenon". Ref. to TRANSMISSION (DIAGNOSTICS)>DIAGNOSTICS WITH PHENOMENON .
    3. Perform the road test. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>ROAD TEST .
    4. Read the DTC using Subaru Select Monitor. Ref. to TRANSMISSION (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

    DTC Check 

    Are any DTCs displayed?

    Yes:  Go to  6.

    No:  Finish the diagnosis.

  6. PERFORM DIAGNOSIS  .
    1. Inspect by referring to "Diagnostic Procedure with Diagnostic Trouble Code (DTC)". Ref. to TRANSMISSION (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) .
      NOTE: For the DTC table, refer to "Diagnostic Trouble Code (DTC)". Ref. to TRANSMISSION (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>LIST .
    2. Repair the trouble cause.
    3. Using the Subaru Select Monitor, perform the clear memory. Ref. to COMMON (diag)>CLEAR MEMORY .

      Clear Memory 

    4. Execute the inspection mode. Ref. to TRANSMISSION (DIAGNOSTICS)>INSPECTION MODE .
    5. Read the DTC using Subaru Select Monitor. Ref. to TRANSMISSION (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

      DTC Check 

    Are any DTCs displayed?

    Yes:  Inspect by referring to "Diagnostic Procedure with Diagnostic Trouble Code (DTC)". Ref. to TRANSMISSION (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) .

    No:  Finish the diagnosis.

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