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 . 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 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 article. 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 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 Inspection Mode. Ref. to 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 TRANSMISSION (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC) .
  NOTE: For the DTC table, refer to "List of Diagnostic Trouble Code (DTC)". Ref. to TRANSMISSION (DIAGNOSTICS)>List of Diagnostic Trouble Code (DTC) .
2. Repair the trouble cause.
3. Clear the memory.
4. Perform the Inspection Mode. Ref. to 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 TRANSMISSION (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC) .
- No : Finish the diagnosis.