Basic Diagnostic Procedure: Procedure

CHECK PRE-INSPECTION.
1. Ask the customer when and how the trouble occurred using the interview check list. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS)>CHECK LIST FOR INTERVIEW
2. Before performing diagnostics, check the following items which might affect CVT problems.
  - General inspection Ref. to CONTINUOUSLY VARIABLE 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 Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR690)>STALL TEST
  - Secondary pressure test Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR580)>SECONDARY PRESSURE (LINE PRESSURE) TEST Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR690)>SECONDARY PRESSURE (LINE PRESSURE) TEST
  - Transfer clutch pressure test Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR580)>TRANSFER CLUTCH PRESSURE TEST Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR690)>TRANSFER CLUTCH PRESSURE TEST
  - Time lag test Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR580)>TIME LAG TEST Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR690)>TIME LAG TEST
  - Road test Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR580)>ROAD TEST Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR690)>ROAD TEST
  - Inhibitor switch Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR580)>INHIBITOR SWITCH Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR690)>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 DISPLAY.
Read the DTC.

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

Is DTC displayed on Subaru Select Monitor?

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

Go to 6
NOTE:
- For the time stamp, refer to LAN information. Ref. to LAN SYSTEM (DIAGNOSTICS)>General Description>CAUTION>TIME STAMP
- Depending on DTCs, time stamp may not be stored.
No: Go to 5
PERFORM GENERAL DIAGNOSTICS.
1. Inspect using "Diagnostic Procedure without Diagnostic Trouble Code (DTC)". Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITHOUT DIAGNOSTIC TROUBLE CODE (DTC)
2. Inspect using "Diagnostics with Phenomenon". Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS)>DIAGNOSTICS WITH PHENOMENON
3. Perform the Inspection Mode. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS)>INSPECTION MODE
4. Read the DTC.
Is DTC displayed on Subaru Select Monitor?

Yes: Go to 6

No: Finish the diagnosis.
PERFORM DIAGNOSIS.
1. Inspect by referring to "Diagnostic Procedure with Diagnostic Trouble Code (DTC)". Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
  NOTE: For the DTC table, refer to "List of Diagnostic Trouble Code (DTC)". Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS)>LIST OF DIAGNOSTIC TROUBLE CODE (DTC)
2. Repair the trouble cause.
3. Perform the Clear Memory Mode.
4. Perform the Inspection Mode. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS)>INSPECTION MODE
5. Read the DTC.
Is DTC displayed on Subaru Select Monitor?

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

No: Finish the diagnosis.