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 service 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.