Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Forester 1999-2004 Approved Subaru Forester 2003 `03 for3_sec2_11_1

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ENGINE (DIAGNOSTICS)

EN(TURBO)
Page
1. Basic Diagnostic Procedure ........................................................................2
2. Check List for Interview...............................................................................4
3. General Description ....................................................................................6
4. Electrical Components Location..................................................................9
5. Engine Control Module (ECM) I/O Signal .................................................22
6. Engine Condition Data ..............................................................................26
7. Transmission Control Module (TCM) I/O Signal .......................................27
8. Data Link Connector .................................................................................31
9. OBD-II General Scan Tool ........................................................................32
10. Subaru Select Monitor...............................................................................34
11. Read Diagnostic Trouble Code .................................................................41
12. Inspection Mode........................................................................................42
13. Drive Cycle................................................................................................47
14. Clear Memory Mode..................................................................................49
15. Compulsory Valve Operation Check Mode ...............................................50
16. Engine Malfunction Indicator Lamp (MIL) .................................................52
17. Diagnostics for Engine Starting Failure.....................................................61
18. List of Diagnostic Trouble Code (DTC) .....................................................77
19. Diagnostic Procedure with Diagnostic Trouble Code (DTC) .....................84
20. General Diagnostic Table........................................................................308
BASIC DIAGNOSTIC PROCEDURE
ENGINE (DIAGNOSTICS)

1. Basic Diagnostic Procedure
A: PROCEDURE
1. ENGINE

Step Check Yes No
1 CHECK ENGINE START FAILURE. Engine starts. Go to step 2. Inspection using
1)Ask the customer when and how trouble "Diagnostics for
occurred using the interview check list. EN(TURBO)-61,
2)Start the engine. Diagnostics for
Does the engine start? Engine Starting
Failure.>
2 CHECK ILLUMINATION OF CHECK ENGINE CHECK ENGINE warning light Go to step 3. Inspection using
MALFUNCTION INDICATOR LAMP (MIL). illuminates. "General Diagnos-
Does the CHECK ENGINE malfunction indica- tics Table".
3 CHECK INDICATION OF DIAGNOSTIC DTC is displayed. Record the DTC Repair the related
TROUBLE CODE (DTC) ON DISPLAY. code. Repair the parts.
1)Turn the ignition switch to OFF. trouble cause. NOTE:
2)Connect the Subaru Select Monitor or OBD- Go to diagnostics of MIL
4)Read the DTC on Subaru Select Monitor or step 4. (CHECK ENGINE
OBD-II general scan tool. malfunction indica-
Does the Subaru Select Monitor or OBD-II tor lamp) circuit or
general scan tool indicate DTC? combination
meter.
4 PERFORM THE DIAGNOSIS. DTC is displayed. Inspect using Complete the
1)Perform the clear memory mode. cedure with Diag-
2)Perform the inspection mode. Code (DTC)".
Does the Subaru Select Monitor or OBD-II

EN(TURBO)-2
BASIC DIAGNOSTIC PROCEDURE
ENGINE (DIAGNOSTICS)

2. AUTOMATIC TRANSMISSION
When the diagnostic trouble code (DTC) about au-
tomatic 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

EN(TURBO)-3
CHECK LIST FOR INTERVIEW
ENGINE (DIAGNOSTICS)

2. Check List for Interview
A: CHECK
1. CHECK LIST NO. 1
Check the following items when problem has occurred.
NOTE:
Use copies of this page for interviewing customers.
Customer's name Engine No.
Date of sale Fuel brand
Date of repair Odometer reading km
Vin No. miles
Weather Fine
Cloudy
Rainy
Snowy
Various/Others:
Outdoor temperature

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