Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Forester 1999-2004 Approved Subaru Forester 2003 `03 for3_sec1_11_1

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ENGINE (DIAGNOSTICS)

EN(SOHC)
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 ..............................................................................25
7. Transmission Control Module (TCM) I/O Signal .......................................26
8. Data Link Connector .................................................................................29
9. OBD-II General Scan Tool ........................................................................30
10. Subaru Select Monitor...............................................................................32
11. Read Diagnostic Trouble Code .................................................................39
12. Inspection Mode........................................................................................40
13. Drive Cycle................................................................................................45
14. Clear Memory Mode..................................................................................47
15. Compulsory Valve Operation Check Mode ...............................................48
16. Engine Malfunction Indicator Lamp (MIL) .................................................50
17. Diagnostics for Engine Starting Failure.....................................................60
18. List of Diagnostic Trouble Code (DTC) .....................................................75
19. Diagnostic Procedure with Diagnostic Trouble Code (DTC) .....................81
20. General Diagnostic Table........................................................................261
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 the trouble "Diagnostics for
occurred using the interview check list. EN(SOHC)-60,
2)Start the engine. Diagnostics for
Does the engine start? Engine Starting
Failure.>
2 CHECK ILLUMINATION OF CHECK ENGINE CHECK ENGINE malfunction Go to step 3. Inspection using
MALFUNCTION INDICATOR LAMP (MIL). indicator light illuminates. "General Diagnos-
Does CHECK ENGINE malfunction indicator tics Table".
3 CHECK INDICATION OF DTC ON DISPLAY. DTC is indicated. Record the diag- Repair the related
1)Turn the ignition switch to OFF. nostic trouble parts.
2)Connect the Subaru Select Monitor or the code. Repair the NOTE:
OBD-II general scan tool to data link connec- trouble cause. If DTC is not
tor. Go to MIL (CHECK EN-
or OBD-II general scan tool. step 4. GINE malfunction
Does the Subaru Select Monitor or OBD-II indicator lamp) cir-
general scan tool indicate DTC? cuit or combination
meter.
4 PERFORM THE DIAGNOSIS. DTC is indicated. 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(SOHC)-2
BASIC DIAGNOSTIC PROCEDURE
ENGINE (DIAGNOSTICS)

2. AUTOMATIC TRANSMISSION
When the trouble code about automatic transmis-
sion is shown on display, carry out the following ba-
sic 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(SOHC)-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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