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 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 of [Transmission] using the Subaru Select Monitor. Ref. to TRANSMISSION (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

NOTE: If the communication function of the Subaru Select Monitor cannot be executed properly, 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 of [Transmission] using the 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 or replace the cause of trouble.
3. Using the Subaru Select Monitor, perform the clear memory of [Transmission]. Ref. to COMMON (DIAG)>CLEAR MEMORY .
4. Execute the inspection mode. Ref. to TRANSMISSION (DIAGNOSTICS)>INSPECTION MODE .
5. Check the readiness code of [Transmission] using Subaru Select Monitor and confirm that the diagnosis is completed. Ref. to TRANSMISSION (DIAGNOSTICS)>ALL READINESS DIAGNOSTIC CODE(S) .
6. Read the DTC of [Transmission] using the 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.