Basic Diagnostic Procedure: Procedure

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

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 .

Are any DTCs displayed?

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

No : Go to 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) .
Are any DTCs displayed?

Yes : Go to 6 .

No : Finish the diagnosis.
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 .
4. Execute the inspection mode. Ref. to TRANSMISSION (DIAGNOSTICS)>INSPECTION MODE .
5. Check the readiness code using Subaru Select Monitor and confirm that the diagnosis is completed. Ref. to TRANSMISSION (DIAGNOSTICS)>ALL READINESS DIAGNOSTIC CODE(S) .
6. Read the DTC using Subaru Select Monitor. Ref. to TRANSMISSION (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
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.