Subaru Legacy IV (2008 year). Manual - part 115

 

  Index      Subaru     Subaru Legacy IV - service repair manual 2008 year

 

Search            

 

 

 

 

 

 

 

  

 

Content   ..  113  114  115  116   ..

 

 

Subaru Legacy IV (2008 year). Manual - part 115

 

 

EN(H4SO)(diag)-63

Malfunction Indicator Light

ENGINE (DIAGNOSTICS)

Step

Check

Yes

No

1

CHECK DELIVERY (TEST) MODE CONNEC-
TOR.
1) Disconnect the delivery (test) mode connec-
tor.
2) Turn the ignition switch to ON.

Does the malfunction indicator 
light blink?

Go to step 2.

System is normal.

NOTE:
Malfunction indica-
tor light blinks
when delivery
(test) mode con-
nector is connect-
ed.

2

CHECK HARNESS BETWEEN ECM AND DE-
LIVERY (TEST) MODE CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM.
3) Measure the resistance of harness between 
ECM and chassis ground.

Connector & terminal

(B135) No. 27 — Chassis ground:

Is the resistance less than 5 

:? Repair the short 

circuit of harness 
between ECM and 
delivery (test) 
mode connector.

Replace the ECM. 
<Ref. to 
FU(H4SO)-39,
Engine Control 
Module (ECM).>

EN(H4SO)(diag)-64

Diagnostics for Engine Starting Failure

ENGINE (DIAGNOSTICS)

17.Diagnostics for Engine Starting Failure

A: PROCEDURE

1. Check of the fuel amount

p

2. Inspection of starter motor circuit. <Ref. to EN(H4SO)(diag)-65, STARTER MOTOR CIRCUIT, Diagnostics for Engine Starting 
Failure.>

p

3. Inspection of ECM power supply and ground line. <Ref. to EN(H4SO)(diag)-69, CHECK POWER SUPPLY AND GROUND 
LINE OF ENGINE CONTROL MODULE (ECM), Diagnostics for Engine Starting Failure.>

p

4. Inspection of ignition control system. <Ref. to EN(H4SO)(diag)-71, IGNITION CONTROL SYSTEM, Diagnostics for Engine 
Starting Failure.>

p

5. Inspection of fuel pump circuit. <Ref. to EN(H4SO)(diag)-74, FUEL PUMP CIRCUIT, Diagnostics for Engine Starting Failure.>

p

6. Inspection of fuel injector circuit. <Ref. to EN(H4SO)(diag)-76, FUEL INJECTOR CIRCUIT, Diagnostics for Engine Starting Fail-
ure.>

EN(H4SO)(diag)-65

Diagnostics for Engine Starting Failure

ENGINE (DIAGNOSTICS)

B: STARTER MOTOR CIRCUIT

CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H4SO)(diag)-50,
Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4SO)(diag)-41, Inspection Mode.>.
WIRING DIAGRAM:

EN-06830

16

10 11 12 13 14 15

25

24

30

9

8

7

17 18 19 20
28

21 22 23

29

32

31

1

2

3

4

5

6

27

26

33 34 35

No. 21

B225

B225

B106

MAIN SBF

SBF-6

E

15

13

16

14

ECM

B136

B106

B72

B136

20

32

B72

B14

3

2

1

2

M

1

3

4 5 6

2

BATTERY

IGNITION
SWITCH

STARTER RELAY

STARTER MOTOR 

(MAGNET)

CLUTCH

START 

SWITCH

B12

T3

T7

INHIBITOR SWITCH

P

R

N

D

9

6

11

12

AT

AT

AT

AT

B12

T7

1 2 3 4
5 6 7 8
9 10 11 12

13
14

15 16

17

27

24

25
26

20

21
22

23

29
30

31

28

32

35

33
34

37
38

39

36

40

8

9

10

11 12

1

2

5

3

4

7

6

19

18

MT

MT

MT

MT

1
2

1 2 3 4 5

7

6

9

8

EN(H4SO)(diag)-66

Diagnostics for Engine Starting Failure

ENGINE (DIAGNOSTICS)

Step

Check

Yes

No

1

CHECK BATTERY.
Check the battery voltage.

Is the voltage 12 V or more?

Go to step 2.

Charge or replace 
the battery.

2

CHECK OPERATION OF STARTER MOTOR.

NOTE:
Check the security alarm is not sounding.

Does the starter motor oper-
ate?

Go to step 3.

Go to step 4.

3

CHECK DTC.

Is DTC displayed? <Ref. to 
EN(H4SO)(diag)-40, OPERA-
TION, Read Diagnostic Trouble 
Code (DTC).>

Check the appro-
priate DTC using 
the “List of Diag-
nostic Trouble 
Code (DTC)”. 
<Ref. to 
EN(H4SO)(diag)-
80, List of Diagnos-
tic Trouble Code 
(DTC).>

The circuit has 
returned to a nor-
mal condition at 
this time. Repro-
duce the failure, 
and then perform 
the diagnosis 
again.

NOTE:
In this case, tem-
porary poor con-
tact of connector
may be the cause.

4

CHECK INPUT SIGNAL FOR STARTER MO-
TOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from starter 
motor.
3) Turn the ignition switch to START.
4) Measure the voltage between the starter 
motor connector and the engine ground.

Connector & terminal

(B14) No. 1 (+) — Engine ground (–):

NOTE:
For AT model, place the select lever in “P”
range or “N” range. For MT model, depress the
clutch pedal.

Is the voltage 10 V or more?

Check the starter 
motor. <Ref. to 
SC(H4SO)-6, 
Starter.>

Go to step 5.

5

CHECK HARNESS BETWEEN BATTERY 
AND IGNITION SWITCH CONNECTOR.
1) Disconnect the connector from ignition 
switch.
2) Measure the power supply voltage between 
ignition switch connector and chassis ground.

Connector & terminal

(B72) No. 3 (+) — Chassis ground (–):

Is the voltage 10 V or more?

Go to step 6.

Check the follow-
ing item and repair 
if necessary.
• Blown out of fuse
• Open or ground 
short circuit of har-
ness between igni-
tion switch 
connector and bat-
tery

6

CHECK IGNITION SWITCH.
1) Disconnect the connector from ignition 
switch.
2) Measure the resistance between ignition 
switch terminals after turning the ignition switch 
to START position.

Terminals

No. 2 — No. 3:

Is the resistance less than 5 

:? Go to step 7.

Replace the igni-
tion switch. <Ref. 
to SL-49, 
REPLACEMENT, 
Ignition Key Lock.>

 

 

 

 

 

 

 

Content   ..  113  114  115  116   ..