Basic Diagnostic Procedure: Procedure

CHECK PRE-INSPECTION .
1. Ask the customer when and how the trouble occurred using the Check List for Interview. Ref. to TRANSMISSION (DIAGNOSTICS)>CHECK LIST FOR INTERVIEW .
2. Before performing diagnostics, check the following items which might affect AT 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 AUTOMATIC TRANSMISSION>STALL TEST .
  - Line pressure test Ref. to AUTOMATIC TRANSMISSION>LINE PRESSURE TEST .
  - Time lag test Ref. to AUTOMATIC TRANSMISSION>TIME LAG TEST .
  - ROAD TEST Ref. to AUTOMATIC TRANSMISSION>ROAD TEST .
  - Inhibitor switch Ref. to AUTOMATIC TRANSMISSION>INHIBITOR SWITCH .
Is the check result OK?

Yes: Go to 2.

No: Repair the items which may be affecting the AT trouble.
CHECK MALFUNCTION INDICATOR LIGHT .
Start the engine and wait for 2 seconds or more. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>WARNING LIGHT ILLUMINATION PATTERN .

Does the malfunction indicator light illuminate?

Yes: Go to 3.

No: Go to 4.
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 5.

No: Go to 4.
PERFORM GENERAL DIAGNOSTICS .
1. Inspect using "Diagnostics with Phenomenon". Ref. to TRANSMISSION (DIAGNOSTICS)>DIAGNOSTICS WITH PHENOMENON .
2. Perform the road test. Ref. to AUTOMATIC TRANSMISSION>ROAD TEST .
3. 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 5.

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 (DIAGNOSTICS)>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.