AUTOMATIC TRANSMISSION (DIAGNOSTICS)(4AT) > Basic Diagnostic Procedure

STEP	CHECK	YES	NO
1.CHECK PRE-INSPECTION. 1) Ask the customer when and how the trouble occurred using the interview check list. 2) Check the following items which may be affecting the AT trouble. • General inspection • Disconnection of harness connector • Visual check for harness damage • Oil leakage • Stall speed test • Line pressure test • Transfer clutch pressure test • Time lag test • Road test • Inhibitor switch	Is the item that might influence the AT problem normal?		Repair or replace items which might affect the AT problem.
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?		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?
4.CHECK DTC. Read the DTC. NOTE: If the communication function of Subaru Select Monitor cannot be executed normally, check the communication circuit.	Is DTC displayed on Subaru Select Monitor?	Record all DTC.
5.CHECK FREEZE FRAME DATA. Using the Subaru Select Monitor, check the Freeze Frame Data.	Are freeze frame data recorded?	Record the freeze frame data.
6.PERFORM GENERAL DIAGNOSTICS. 1) Inspect using “Diagnostic Procedure without Diagnostic Trouble Code (DTC)”. 2) Inspect using “Diagnostics with Phenomenon”. 3) Perform the Inspection Mode. 4) Read the DTC.	Is DTC displayed on Subaru Select Monitor?		Finish the diagnosis.
7.PERFORM DIAGNOSIS. 1) Inspect by referring to “Diagnostic Procedure with Diagnostic Trouble Code (DTC)”. NOTE: Refer to “List of Diagnostic Trouble Code (DTC)” for DTC. 2) Repair the trouble cause. 3) Perform the Clear Memory Mode. 4) Perform the Inspection Mode. 5) Read the DTC.	Is DTC displayed on Subaru Select Monitor?	Inspect by referring to “Diagnostic Procedure with Diagnostic Trouble Code (DTC)”.	Finish the diagnosis.