Basic Diagnostics Procedure
A: BASIC DIAGNOSTIC PROCEDURE FOR ENGINE6A1: CHECK ENGINE START FAILURE.
1) Ask the customer when and how the trouble occurred using the interview check list.
2) Start the engine.
CHECK: Does the engine start?
YES: Go to step 6A2.
NO: Inspection using "Diagnostics for Engine Start Failure". No Start Testing (Engine Starting Failure)
6A2: CHECK ILLUMINATION OF CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL).
CHECK: Does CHECK ENGINE malfunction indicator lamp illuminate?
YES: Go to step 6A3.
NO: Inspection using "11. General Diagnostics Table". General Diagnostic Table
6A3: CHECK INDICATION OF DTC ON DISPLAY.
1) Turn ignition switch to OFF.
2) Connect the Subaru Select Monitor or the OBD-II general scan tool to data link connector.
3) Turn ignition switch to ON and the Subaru Select Monitor or OBD-II general scan tool switch to ON.
4) Read DTC on the Subaru Select Monitor or OBD-II general scan tool.
CHECK: Does the Subaru Select Monitor or OBD-II general scan tool indicate DTC?
YES: Go to step 6A4.
NO: Repair the related parts.
NOTE:
If DTC is not shown on display although the MIL illuminates, perform diagnostics of MIL (CHECK ENGINE malfunction indicator lamp) circuit or combination meter.
6A4: PERFORM THE DIAGNOSIS.
1) Inspect using "Diagnostics Chart with Trouble Code (DTC)".
NOTE:
Carry out the basic check, only when DTC about automatic transmission is shown on display.
2) Repair the trouble cause.
3) Perform the clear memory mode.
4) Perform the inspection mode.
CHECK: Does the Subaru Select Monitor or OBD-II general scan tool indicate DTC?
YES: Inspect using "Diagnostics Chart with Trouble Code (DTC)".
NO: Complete the diagnosis.
B: BASIC CHECK ITEMS FOR AT
When a trouble code about automatic transmission is shown on display, carry out the following basic check. After that, carry out the replacement or repair work.
1) ATF level check
2) Differential gear oil level check
3) ATF leak check
4) Differential gear oil leak check
5) Stall test
6) Line pressure test
7) Transfer clutch pressure test
8) Time lag test
9) Road test
10) Shift characteristics
C: CHECK LIST FOR INTERVIEW
NOTE: Use copies of these pages for interviewing customers.
1. CHECK LIST NO. 1
Check these when a problem has occurred.
2. CHECK LIST NO. 2
Check these items when the MIL turns on.