Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 267

EN(H4DOTC)(diag)-292

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

DA:DTC P0604 INTERNAL CONTROL MODULE RANDOM ACCESS MEMORY

(RAM) ERROR

DTC DETECTING CONDITION:

• Immediately at fault recognition

• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-191, DTC P0604 INTERNAL CONTROL MODULE

RANDOM ACCESS MEMORY (RAM) ERROR, Diagnostic Trouble Code (DTC) Detecting Criteria.>

TROUBLE SYMPTOM:

• Engine does not start.

• Engine stalls.
CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-63,

OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-49, PROCE-

DURE, Inspection Mode.>.

DB:DTC P0605 INTERNAL CONTROL MODULE READ ONLY MEMORY (ROM)

ERROR

NOTE:

For the diagnostic procedure, refer to DTC P0606. <Ref. to EN(H4DOTC)(diag)-293, DTC P0606 CONTROL

MODULE PROCESSOR, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

Step

Check

Yes

No

1

CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?

Check the appropri-
ate DTC using the
“List of Diagnostic
Trouble Code
(DTC)”. <Ref. to
EN(H4DOTC)(diag)
-87, List of Diagnos-
tic Trouble Code
(DTC).>

Even if DTC is
detected, the cir-
cuit has returned to
a normal 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,
temporary open or
short circuit of har-
ness may be the
cause.

EN(H4DOTC)(diag)-293

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

DC:DTC P0606 CONTROL MODULE PROCESSOR

DTC DETECTING CONDITION:

• Immediately at fault recognition

• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-193, DTC P0606 CONTROL MODULE PROCESSOR,

Diagnostic Trouble Code (DTC) Detecting Criteria.>

TROUBLE SYMPTOM:

• Improper idling

• Poor driving performance
CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-63,

OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-49, PROCE-

DURE, Inspection Mode.>.

WIRING DIAGRAM:

• Engine electrical system, without SI-DRIVE <Ref. to WI-32, WITHOUT SI-DRIVE, WIRING DIAGRAM,

Engine Electrical System.>

• Engine electrical system, with SI-DRIVE <Ref. to WI-48, WITH SI-DRIVE, WIRING DIAGRAM, Engine

Electrical System.>

EN-08738

B135

B:

B134

A:

B137

B136

D:

C:

3

8

39

2

8

6

24

25

*

*

E2

B21

4

6

1

2

3

5

A1

A2

A29

A19

A3

A6

A4

D1

D3

40

34

35

36

A2

8

C4

A1

8

B21

B72

E57

B122

*

B72

C1

D7

B13

C2 C30

24

23

22

21

1

3

15A

B220

B220

B220

3

4

18

19

6

7

4

3
5

2

1

12

11

10

9

8

40

36 39

38

37

34

33

35

32

28 31

30

29

23

22

21

20

26

25

24

27

17

16

15

14

13

2

6

5

4

3

1

32 33

24

15

14

25

31

30

29

35

34

23

22

21

20

19

18

28

27

26

17

16

13

12

11

10

3

9

1

2

8

7

6

5

4

B: B135

A: B134

6

5

4

3

2

1

D: B137

26

25

24

23

22

18

28

27

17

16

15

14

13

31

30

29

21

20

19

12

11

10

4

3

6

5

9

8

7

2

1

C: B136

35

34

33

32

7

26

25

24

23

22

18

28

27

17

16

15

14

13

31

30

29

21

20

19

12

11

10

4

3

6

5

9

8

2

1

B122

8

7

6

5

4

3

2

1

33

32

31

30

29

28

27

26

47

46

45

44

43

42

54

53

52

51

50

49

48

41

40

39

38

37

36

35

34

25

24

23

22

21

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

31

30

32

29

34

33

21

20

19

18

17

16

28

27

26

15

14

13

12

11

25

23

22

24

10

3

4

9

1

2

8

7

6

5

E

E

E

SBF-7

SBF-6

ECM

E57

FUSE

(RELAY BLOCK)

IGNITION

SWITCH

BATTERY

MAIN RELAY

No. 13

No. 12

MAIN SBF

: TERMINAL No. OPTIONAL ARRANGEMENT

ELECTRONIC

THROTTLE

CONTROL

EN(H4DOTC)(diag)-294

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

DD:DTC P060A INTERNAL CONTROL MODULE MONITORING PROCESSOR

PERFORMANCE

NOTE:

For the diagnostic procedure, refer to DTC P0606. <Ref. to EN(H4DOTC)(diag)-293, DTC P0606 CONTROL

MODULE PROCESSOR, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

DE:DTC P060B INTERNAL CONTROL MODULE A/D PROCESSING PERFOR-

MANCE

NOTE:

For the diagnostic procedure, refer to DTC P0606. <Ref. to EN(H4DOTC)(diag)-293, DTC P0606 CONTROL

MODULE PROCESSOR, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

Step

Check

Yes

No

1

CHECK INPUT VOLTAGE OF ECM.
1) Turn the ignition switch to ON.
2) Measure the voltage between ECM connec-
tor and chassis ground.

Connector & terminal

(B136) No. 1 (+) — Chassis ground (–):
(B137) No. 7 (+) — Chassis ground (–):

Is the voltage 10 — 13 V?

Go to step

2.

Repair the open or
ground short circuit
of power supply
circuit.

2

CHECK INPUT VOLTAGE OF ECM.
1) Start the engine.
2) Measure the voltage between ECM connec-
tor and chassis ground.

Connector & terminal

(B136) No. 1 (+) — Chassis ground (–):
(B137) No. 7 (+) — Chassis ground (–):

Is the voltage 13 — 15 V?

Go to step

3.

Repair the open or
ground short circuit
of power supply
circuit.

3

CHECK HARNESS BETWEEN ECM AND
ELECTRONIC THROTTLE CONTROL CON-
NECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM and
electronic throttle control.
3) Measure the resistance of harness between
ECM connector and electronic throttle control
connector.

Connector & terminal

(B134) No. 19 — (E57) No. 5:
(B134) No. 29 — (E57) No. 3:

Is the resistance less than 1 Ω? Go to step

4.

Repair the harness
and connector.
NOTE:

In this case, repair
the following item:
• Open circuit in
harness between
ECM

connector

and

electronic

throttle

control

connector
• Poor contact of
coupling connector

4

CHECK ECM GROUND HARNESS.
1) Connect all connectors.
2) Turn the ignition switch to ON.
3) Measure the voltage between ECM connec-
tor and chassis ground.

Connector & terminal

(B134) No. 3 — Chassis ground:
(B134) No. 4 — Chassis ground:
(B134) No. 6 — Chassis ground:
(B137) No. 1 — Chassis ground:
(B137) No. 3 — Chassis ground:

Is the voltage less than 1 V?

Repair the poor
contact of ECM
connector.

Repair the harness
and connector.
NOTE:

In this case, repair
the following item:
• Open circuit in
ground circuit
• Further tighten-
ing of the engine
ground terminal
• Poor contact of
ECM connector
• Poor contact of
coupling connector

EN(H4DOTC)(diag)-295

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

DF:DTC P0616 STARTER RELAY CIRCUIT LOW

DTC DETECTING CONDITION:

• Immediately at fault recognition

• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-199, DTC P0616 STARTER RELAY CIRCUIT LOW,

Diagnostic Trouble Code (DTC) Detecting Criteria.>

TROUBLE SYMPTOM:

Failure of engine to start
CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-63,

OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-49, PROCE-

DURE, Inspection Mode.>.

WIRING DIAGRAM:

• Engine electrical system, without SI-DRIVE <Ref. to WI-32, WITHOUT SI-DRIVE, WIRING DIAGRAM,

Engine Electrical System.>

• Engine electrical system, with SI-DRIVE <Ref. to WI-48, WITH SI-DRIVE, WIRING DIAGRAM, Engine

Electrical System.>

ECM

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

B225

1
2

B106

B106

1

2

5

6

7

2

1

3

4

29

10 11 12 13 14 15

25

24

16

30

9

8

17 18 19

20
28

21 22 23

32

31

26 27

33

34 35

EN-09249

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

B72

1

3

4 5 6

2

6

2

3

B14

B72

C: B136

C: B136

B: B135

B: B135

0

1

2

1

9

1

1

B225

C16

B26

SBF-6

E

M

F/B No. 21

MAIN SBF

BATTERY

IGNITION

SWITCH

STARTER

RELAY

STARTER MOTOR

CLUTCH

START

SWITCH