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.>