Subaru Legacy IV (2008 year). Manual — part 653

CS-19

AT Shift Lock Control System

CONTROL SYSTEMS

8

CHECK HARNESS BETWEEN BODY INTE-
GRATED UNIT AND “P” RANGE SWITCH.
1) Disconnect the connector from body inte-
grated unit.
2) Disconnect the connector of “P” range
switch.
3) Check for open circuit of harness, short cir-
cuit to battery or short circuit to ground between
the body integrated unit and “P” range switch.

Connector & terminal

(B281) No. 13 — (B116) No. 1:

Is the harness normal?

Go to step 9.

Repair or replace
the harness
between the body
integrated unit and
the “P” range
switch.

9

CHECK HARNESS BETWEEN “P” RANGE
SWITCH AND CHASSIS GROUND.
Measure the resistance of harness between “P”
range switch and chassis ground.

Connector & terminal

(B116) No. 2 — Chassis ground:

Is it less than 10

:?

Go to step 10.

Repair the harness
between the “P”
range switch and
chassis ground.

10

CHECK “P” RANGE SWITCH.
Measure the resistance between “P” range
switch connector terminals.

Terminals

No. 2 — No. 1:

Is it less than 10

: in the “P”

range, and 1 M

: or more in

ranges other than “P”?

Replace the body
integrated unit.

Replace the “P”
range switch.

11

CHECK STOP LIGHT SWITCH INPUT SIG-
NAL.
1) Disconnect the connector from body inte-
grated unit.
2) Measure the voltage between the body inte-
grated unit connector terminal and chassis
ground.

Connector & terminal

(B281) No. 23 (+) — Chassis ground (–):

Is the voltage 9 V or more when
the brake pedal is depressed,
and less than approximately
1.5 V when not pressed?

Replace the body
integrated unit.

Check the stop
light system.

12

CHECK SHIFT LOCK SOLENOID OPERA-
TION.
Connect the battery to the shift lock solenoid
unit connector terminal, and operate the sole-
noid.

Terminals

No. 3 (+) — No. 4 (–):

Does the shift lock solenoid
operate normally?

Check the lock
mechanism of the
select lever body.

Replace the shift
lock solenoid.

Step

Check

Yes

No

CS-20

AT Shift Lock Control System

CONTROL SYSTEMS

4. KEY INTERLOCK CANNOT BE LOCKED OR RELEASED

E

E

B281

C:

B280

B:

C7

B5

1

2

C13

B116

1

2

B350

B350

3

4

1 2 3 4

B350

B116

1 2

3 4

5 6 7 8 9 10

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

B281

5

4

6 7

8

2

1

9

3

10

22

23

11 12 13 14 15

24 25

26 27

16 17 18

28 29

19 20

21

30

B280

C:

B:

SBF-8

No.

7

C2

A3

E

2

2

B76

7

B75

B38

i3

i84

A:

B75

1
2

B76

1
2

B38

1 2 3 4

5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20

i84

A:

1 2

3 4

5 6

7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

24 25

26 27 28 29

30 31 32 33

34 35

C1

No.

14

CS-00981

B

A

TTER

Y

BODY INTEGRATED UNIT

P RANGE SWITCH

KEY WARNING SWITCH

DELIVERY (TEST)

MODE CONNECTOR

KEY LOCK
SOLENOID

CS-21

AT Shift Lock Control System

CONTROL SYSTEMS

Step

Check

Yes

No

1

CHECK DELIVERY (TEST) MODE CONNEC-
TOR.
Check that the delivery (test) mode connector is
disconnected.

Is the delivery (test) mode con-
nector disconnected?

Go to step 2.

Disconnect the
delivery (test)
mode connector.

2

CHECK BODY INTEGRATED UNIT POWER
SUPPLY AND GROUND CIRCUIT.
<Ref. to CS-15, BODY INTEGRATED UNIT
POWER SUPPLY AND GROUND CIRCUIT,
INSPECTION, AT Shift Lock Control System.>

Is there an abnormal condition? Follow the proce-

dures to inspect
and repair.

Go to step 3.

3

CHECK CURRENT DATA.
1) Connect the Subaru Select Monitor.
2) Shift the select lever to the “P” range.
3) Turn the ignition switch to ON.
4) Display the current data display and display
“P SW”. <Ref. to LAN(diag)-12, OPERATION,
Subaru Select Monitor.>

Is the display “ON” in the P
range and “OFF” in ranges
other than P?

Go to step 4.

Go to step 7.

4

CHECK CURRENT DATA.
1) Select the current data display and display
the “Key-lock warning SW”. <Ref. to LAN(diag)-
12, OPERATION, Subaru Select Monitor.>
2) Turn the ignition switch to OFF.

Does the display change from
“ON” to “OFF” when the key is
inserted and removed?

Go to step 5.

Go to step 10.

5

CHECK CURRENT DATA.
1) Turn the ignition switch to ON.
2) Select the current data display and display
“Key locking output”. <Ref. to LAN(diag)-12,
OPERATION, Subaru Select Monitor.>

Is the display “ON” in the P
range and “OFF” in ranges
other than P?

Go to step 12.

Go to step 6.

6

CHECK DTC OF BODY INTEGRATED UNIT.
1) Set the select lever to a range other than the
“P” range.
2) Check DTC of body integrated unit.

Is B1105 (key interlock circuit
malfunction) a current malfunc-
tion?

Follow the DTC to
perform inspection
and repair.

Go to step 11.

7

CHECK HARNESS BETWEEN BODY INTE-
GRATED UNIT AND “P” RANGE SWITCH.
1) Disconnect the connector from body inte-
grated unit.
2) Disconnect the connector of “P” range
switch.
3) Check for open circuit of harness, short cir-
cuit to battery or short circuit to ground between
the body integrated unit and “P” range switch.

Connector & terminal

(B281) No. 13 — (B116) No. 1:

Is the harness normal?

Go to step 8.

Repair or replace
the harness
between the body
integrated unit and
the “P” range
switch.

8

CHECK HARNESS BETWEEN “P” RANGE
SWITCH AND CHASSIS GROUND.
Measure the resistance of harness between “P”
range switch and chassis ground.

Connector & terminal

(B116) No. 2 — Chassis ground:

Is it less than 10

:?

Go to step 9.

Repair the harness
between the “P”
range switch and
chassis ground.

9

CHECK “P” RANGE SWITCH.
Measure the resistance between “P” range
switch connector terminals.

Terminals

No. 2 — No. 1:

Is it less than 10

: in the “P”

range, and 1 M

: or more in

ranges other than “P”?

Replace the body
integrated unit.

Replace the “P”
range switch.

CS-22

AT Shift Lock Control System

CONTROL SYSTEMS

10

CHECK HARNESS BETWEEN BATTERY
AND KEY WARNING SWITCH AND BODY IN-
TEGRATED UNIT.
1) Disconnect the connector from body inte-
grated unit.
2) Measure the voltage between body inte-
grated unit and chassis ground.

Connector & terminal

(B281) No. 7 — Chassis ground:

Is the display 9 V or more when
the key is inserted, and less
than 1.5 V with the key
removed?

Replace the body
integrated unit.

Check the follow-
ing items.
• Key warning
switch
• Harness/fuse
• Ignition circuit

11

CHECK DELIVERY (TEST) MODE CONNEC-
TOR HARNESS.
1) Disconnect the connector of body inte-
grated unit.
2) Check for open circuit of harness, short cir-
cuit to battery or short circuit to ground between
the body integrated unit connector and delivery
(test) mode connector.

Connector & terminal

(i84) No. 3 — (i3) No. 7:

Is the harness normal?

Go to step 12.

Repair or replace
the harness
between the body
integrated unit and
delivery (test)
mode connector.

12

CHECK HARNESS BETWEEN BODY INTE-
GRATED UNIT AND KEY LOCK SOLENOID.
1) Disconnect the connector from body inte-
grated unit.
2) Disconnect the connector from the key lock
solenoid.
3) Check for open circuit of harness, short cir-
cuit to battery or short circuit to ground between
the body integrated unit and key lock solenoid.

Connector & terminal

(B280) No. 5 — (B350) No. 2:

Is the harness normal?

Go to step 13.

Repair or replace
the harness
between the body
integrated unit and
the key lock sole-
noid.

13

CHECK HARNESS BETWEEN KEY LOCK
SOLENOID AND CHASSIS GROUND.
Measure the resistance of harness between
key lock solenoid and chassis ground.

Connector & terminal

(B350) No. 1 — Chassis ground:

Is it less than 10

:?

Go to step 14.

Repair or replace
the harness
between the key
lock solenoid and
chassis ground.

14

CHECK KEY LOCK SOLENOID OPERATION.
Connect the battery to the key lock solenoid
connector terminal, and operate the solenoid.

Does the key lock solenoid
operate normally?

Go to step 15.

Replace the key
lock solenoid.

15

CHECK OUTPUT OF BODY INTEGRATED
UNIT.
1) Connect all connectors.
2) Insert the key.
3) Measure the voltage between body inte-
grated unit and chassis ground.

Connector & terminal

(B280) No. 5 — Chassis ground:

Is it 5 V or more in ranges other
than “P”, and less than 1.5 V in
the “P” range?

Check the lock
mechanism of the
steering lock body.

Replace the body
integrated unit.

Step

Check

Yes

No