Subaru Legacy III (2000-2003 year). Manual - part 217

EN(H4SOw/oOBD)-58

ENGINE (DIAGNOSTICS)

LIST OF DIAGNOSTIC TROUBLE CODE (DTC)

*: Immobilizer system equipped model only

35

Purge control solenoid 
valve

• The purge control solenoid valve is 
not in function.
• The harness connector between 
ECM and purge control solenoid valve 
is in short or open.

<Ref. to EN(H4SOw/oOBD)-86, DTC 35 PURGE 
CONTROL SOLENOID VALVE, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

38

Torque control signal (AT) • Abnormal signal is entered from 

TCM.
• The harness connector between 
ECM and TCM is in short or open.

<Ref. to EN(H4SOw/oOBD)-89, DTC 38 
TORQUE CONTROL SIGNAL, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

45

Pressure sensor

• The pressure sensor signal is 
abnormal.
• The harness connector between 
ECM and pressure sensor is in short 
or open.

<Ref. to EN(H4SOw/oOBD)-91, DTC 45 PRES-
SURE SENSOR, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>

46

CO resistor (General 
spec. vehicles)

• The CO resistor signal is abnormal.
• The harness connector between 
ECM and CO resistor is in short or 
open.
• The CO valve is not adjusted to 
specification.

<Ref. to EN(H4SOw/oOBD)-93, DTC 46 CO 
RESISTOR (GENERAL SPEC. VEHICLES), 
Diagnostic Procedure with Diagnostic Trouble 
Code (DTC).>

51

Neutral position switch 
(MT)

• The neutral position switch signal is 
abnormal.
• The harness connector between 
ECM and neutral position switch is in 
short or open.

<Ref. to EN(H4SOw/oOBD)-95, DTC 51 NEU-
TRAL POSITION SWITCH (MT VEHICLE), Diag-
nostic Procedure with Diagnostic Trouble Code 
(DTC).>

Park/Neutral position 
switch (AT)

• The park/neutral position switch 
signal is abnormal.
• The shift cable is connected abnor-
mally.
• The harness connector between 
ECM and inhibitor switch is in short or 
open.

<Ref. to EN(H4SOw/oOBD)-98, DTC 51 PARK/
NEUTRAL POSITION SWITCH (AT VEHICLE), 
Diagnostic Procedure with Diagnostic Trouble 
Code (DTC).>

53*

Immobilizer system

Faulty immobilizer system.

<Ref. to IM-2, Basic Diagnostic Procedure.>

85

Charge system

Charge system is abnormal.

<Ref. to EN(H4SOw/oOBD)-100, DTC 85 
CHARGE SYSTEM, Diagnostic Procedure with 
Diagnostic Trouble Code (DTC).>

Trouble 

code

Item

Contents of diagnosis

Index

EN(H4SOw/oOBD)-59

ENGINE (DIAGNOSTICS)

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

14.Diagnostic Procedure with Diagnostic Trouble Code (DTC)

A: DTC 11 CRANKSHAFT POSITION SENSOR

• DIAGNOSIS:

• No signal entered from crankshaft position sensor when ignition switch is ON.
• The harness connector between ECM and crankshaft position sensor is in short or open.

• TROUBLE SYMPTOM:

• Engine stalls.
• Restarting impossible

CAUTION:
After repair or replacement of faulty parts, conduct CLEAR MEMORY and INSPECTION MODES. <Ref. 
to EN(H4SOw/oOBD)-28, OPERATION, Clear Memory Mode.>  and <Ref. to EN(H4SOw/oOBD)-26, OP-
ERATION, Inspection Mode.>
• WIRING DIAGRAM:

EN-01050

1

2

19

17

8

10

B21

B83

E2

E10

5 6 7

8

2

1

9

4

3

10

24

22 23

25

11 12 13 14 15

26

27 28

16 17 18 19

20 21

B135

B21

B83

E10

1 2

B135 ECM

CRANKSHAFT

POSITION

SENSOR

1 2

5

6 7

8

13

14 15

16

9 10

11 12

3 4

17 18

19 20

1 2 3 4 5 6 7 8 9 10 11 12

WITH IMMOBILIZER
WITHOUT IMMOBILIZER

: 2
: 1

1

*

3

*

1

*

2

*

3

*

LHD
RHD

: 7
: 9

2

*

LHD
RHD

: 8
: 7

EN(H4SOw/oOBD)-60

ENGINE (DIAGNOSTICS)

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

Step

Value

Yes

No

1

CHECK CONDITION OF CRANKSHAFT PO-
SITION SENSOR INSTALLATION.
Are the crankshaft position sensor installing 
bolts tightened securely?

Installing bolts are securely 
tightened.

Go to step 2.

Tighten crank-
shaft position sen-
sor installing bolts 
securely.

2

CHECK CRANKSHAFT POSITION SENSOR.
1) Remove crankshaft position sensor.
2) Measure resistance between connector ter-

minals of crankshaft position sensor.

Terminals

No. 1 — No. 2:

Is the measured value within the specified 
value?

1 — 4 k

Ω

Go to step 3.

Replace crank-
shaft position sen-
sor.

3

CHECK HARNESS BETWEEN ECM AND 
CRANKSHAFT POSITION SENSOR CON-
NECTOR.
1) Connect connector to crankshaft position 

sensor.

2) Disconnect connector from ECM.
3) Measure resistance of harness between 

crankshaft position sensor connector and 
ECM.

Connector & terminal

(B135) No. 8 — (B135) No. 2 (With 
immobilizer)
(B135) No. 8 — (B135) No. 1 (Without 
immobilizer)

Is the measured value within the specified 
value?

1 — 5 k

Ω

Go to step 4.

Repair harness 
and connector.

NOTE:
In this case, repair
the following:
• Open circuit in 
harness between 
crankshaft posi-
tion sensor and 
ECM connector
• Poor contact in 
coupling connector 
(B21)

4

CHECK HARNESS BETWEEN ECM AND 
CRANKSHAFT POSITION SENSOR CON-
NECTOR.
Measure resistance of harness between ECM 
connector and chassis ground.

Connector & terminal

(B135) No. 8 — Chassis ground:

Is the measured value less than the specified 
value?

10 

Ω

Repair ground 
short circuit in har-
ness between 
crankshaft posi-
tion sensor and 
ECM connector.

Go to step 5.

5

CHECK INPUT SIGNAL FOR ECM.
1) Turn ignition switch to OFF.
2) Set the positive (+) probe and ground lead 

of oscilloscope at ECM connector termi-
nals.

3) Measure voltage indicated on oscilloscope 

while cranking the engine.

Connector & terminal

(B135) No. 2 (+) — (B135) No. 8 (

−−−−

): 

(With immobilizer)
(B135) No. 1 (+) — (B135) No. 8 (

−−−−

): 

(Without immobilizer)

Does the measured value exceed the spec-
ified value?

400 mV

Go to step 6.

Replace crank-
shaft position sen-
sor.

6

CHECK POOR CONTACT.
Check poor contact in ECM connector.
Is there poor contact in ECM connector?

There is poor contact.

Repair poor con-
tact in ECM con-
nector.

Go to step 7.

EN(H4SOw/oOBD)-61

ENGINE (DIAGNOSTICS)

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

7

CHECK ECM.
1) Connect all connectors.
2) Erase the memory. <Ref. to EN(H4SOw/

oOBD)-28, OPERATION, Clear Memory 
Mode.>

3) Perform inspection mode. <Ref. to 

EN(H4SOw/oOBD)-26, OPERATION, 
Inspection Mode.>

4) Read out the trouble code. <Ref. to 

EN(H4SOw/oOBD)-24, OPERATION, 
Read Diagnostic Trouble Code (DTC).>
Is the same trouble code (DTC) as in the 
current diagnosis still being output?

DTC is displayed.

Replace genera-
tor.

Go to step 8.

8

CHECK ANY OTHER TROUBLE CODES AP-
PEARANCE.
Are other trouble codes (DTC) being output?

DTC is displayed.

Proceed with the 
diagnosis corre-
sponding to the 
trouble code.

A temporary poor 
contact.

Step

Value

Yes

No