Subaru Crosstrek Service Manual: Basic diagnostic procedure Procedure

1.CHECK PRE-INSPECTION.

1) Ask the customer when and how the trouble occurred using the interview check list. Check List for Interview">

2) Before performing diagnostics, check the following items which might affect CVT problems.

• General inspection General Description > INSPECTION">

• Disconnection of harness connector

• Visual check for harness damage

• Oil leakage

• Stall speed test Stall Test">

• Secondary pressure test Secondary Pressure (Line Pressure) Test">

• Transfer clutch pressure test Transfer Clutch Pressure Test">

• Time lag test Time Lag Test">

• Road test Road Test">

• Inhibitor switch Inhibitor Switch">

Is the check result OK?

Basic Diagnostic Procedure > PROCEDURE">Go to Step 2.

Repair the items which may be affecting the CVT trouble.

2.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?

Basic Diagnostic Procedure > PROCEDURE">Go to Step 3.

Check the AT OIL TEMP light.

3.CHECK AT OIL TEMP LIGHT.

Start the engine and wait for 2 seconds or more.

Does the AT OIL TEMP light blink?

Basic Diagnostic Procedure > PROCEDURE">Go to Step 4.

Basic Diagnostic Procedure > PROCEDURE">Go to Step 5.

4.CHECK DTC DISPLAY.

Read the DTC.

NOTE:

If the communication function of Subaru Select Monitor cannot be executed normally, check the communication circuit. Diagnostic Procedure for Subaru Select Monitor Communication > COMMUNICATION FOR INITIALIZING IMPOSSIBLE">

Is DTC displayed on Subaru Select Monitor?

Record the DTC, time stamp and freeze frame data.
Basic Diagnostic Procedure > PROCEDURE">Go to Step 6.

NOTE:

• For the time stamp, refer to LAN section. General Description > CAUTION">

• Depending on DTCs, time stamp may not be stored.

Basic Diagnostic Procedure > PROCEDURE">Go to Step 5.

5.PERFORM GENERAL DIAGNOSTICS.

1) Inspect using “Diagnostic Procedure without Diagnostic Trouble Code (DTC)”. Diagnostic Procedure without Diagnostic Trouble Code (DTC)">

2) Inspect using “Diagnostics with Phenomenon”. Diagnostics with Phenomenon">

3) Perform the Inspection Mode. Inspection Mode">

4) Read the DTC.

Is DTC displayed on Subaru Select Monitor?

Basic Diagnostic Procedure > PROCEDURE">Go to Step 6.

Finish the diagnosis.

6.PERFORM DIAGNOSIS.

1) Inspect by referring to “Diagnostic Procedure with Diagnostic Trouble Code (DTC)”. Diagnostic Procedure with Diagnostic Trouble Code (DTC)">

NOTE:

For the DTC table, refer to “List of Diagnostic Trouble Code (DTC)”. List of Diagnostic Trouble Code (DTC)">

2) Repair the trouble cause.

3) Perform the Clear Memory Mode.

4) Perform the Inspection Mode. Inspection Mode">

5) Read the DTC.

Is DTC displayed on Subaru Select Monitor?

Inspect by referring to “Diagnostic Procedure with Diagnostic Trouble Code (DTC)”. Diagnostic Procedure with Diagnostic Trouble Code (DTC)">

Finish the diagnosis.

Active test Operation

Check list for interview Check

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