Subaru Legacy III (2000-2003 year). Manual - part 379

EN(H6DO)-318

ENGINE (DIAGNOSTICS)

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

CN:DTC P1518 — STARTER SWITCH CIRCUIT LOW INPUT —

• DTC DETECTING CONDITION:

• Two consecutive driving cycles with fault

• TROUBLE SYMPTOM:

• Failure of engine to start

CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6DO)-54, OP-
ERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H6DO)-47, OPERATION, Inspec-
tion Mode.>.

EN(H6DO)-319

ENGINE (DIAGNOSTICS)

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

• WIRING DIAGRAM:

EN-01082

12

INHIBITOR SWITCH

STARTER

MOTOR

7

P

R

N

D

3

2

1

SBF-4

SBF-1

B14

12

11

T7

T3

B12

B134

T7

1 2 3 4 5 6
7 8 9 10 11 12

16

B134

ECM

BATTERY

1 2 3 4

10 11 12

19 20 21

13

5

6

14 15

7

8 9

16 17

18

22

1

3

B72

IGNITION 
SWITCH

B12

1 2 3 4
5 6 7 8
9 10 11 12

B72

3 4

1 2

EN(H6DO)-320

ENGINE (DIAGNOSTICS)

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

Step

Value

Yes

No

1

CHECK OPERATION OF STARTER MOTOR.
Place the select lever in the “P” or “N” range.
Does starter motor operate when turning igni-
tion switch to “ST”?

Starter motor operates.

Repair harness 
and connector.

NOTE:
In this case, repair
the following:
• Open or ground 
short circuit in har-
ness between 
ECM and starter 
motor connector.
• Poor contact in 
ECM connector.

Check starter 
motor circuit. <Ref. 
to EN(H6DO)-72, 
STARTER 
MOTOR CIR-
CUIT, Diagnostics 
for Engine Start-
ing Failure.>

EN(H6DO)-321

ENGINE (DIAGNOSTICS)

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

MEMO: