Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 764

CC(diag)-17

Diagnostic Procedure with Cancel Code

CRUISE CONTROL SYSTEM (DIAGNOSTICS)

2

CHECK STOP LIGHT & BRAKE SWITCH
CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the stop light & brake switch har-
ness connector.
3) Turn the ignition switch to ON.
4) Measure the voltage between harness con-
nector terminal and chassis ground.

Connector & terminal

5 door model:

(B65) No. 1 (+) — Chassis ground (–):

4 door model:

(B65) No. 3 (+) — Chassis ground (–):

Is the voltage 10 V or more?

Go to step

3.

• Check fuse No. 8
(in fuse & relay
box).
• Check for open
or short in the har-
ness between stop
light & brake switch
and fuse & relay
box.

3

CHECK STOP LIGHT & BRAKE SWITCH
CIRCUIT.
Measure the voltage between harness connec-
tor terminal and chassis ground.

Connector & terminal

5 door model:

(B65) No. 3 (+) — Chassis ground (–):

4 door model:

(B65) No. 1 (+) — Chassis ground (–):

Is the voltage 10 V or more?

Go to step

4.

• Check fuse No. 4
(in fuse & relay
box).
• Check for open
or short in the har-
ness between stop
light & brake switch
and fuse & relay
box.

4

CHECK STOP LIGHT & BRAKE SWITCH
CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the harness connector of ECM.
3) Measure the resistance between ECM har-
ness connector terminal and stop light & brake
switch harness connector terminal.

Connector & terminal

5 door model:

(B136) No. 15 — (B65) No. 4:
(B136) No. 3 — (B65) No. 2:

4 door model:

(B136) No. 15 — (B65) No. 2:
(B136) No. 3 — (B65) No. 4:

Is the resistance less than 10

Ω?

Replace the ECM.
<Ref. to FU(STI)-
59, Engine Control
Module (ECM).>
<Ref. to FU(w/o
STI)-57, Engine
Control Module
(ECM).>

Repair the har-
ness.

Step

Check

Yes

No

CC(diag)-18

Diagnostic Procedure with Cancel Code

CRUISE CONTROL SYSTEM (DIAGNOSTICS)

C: 13

Detected when clutch pedal is depressed or malfunction related to clutch switch occurs.

TROUBLE SYMPTOM:

• Cruise control cannot be set.

• Cruise control cannot be released.

WIRING DIAGRAM:

Cruise Control System <Ref. to WI-163, WIRING DIAGRAM, Cruise Control System.>

Step

Check

Yes

No

1

CHECK CLUTCH SWITCH.
Check the clutch switch. <Ref. to CL-34,
INSPECTION, Clutch Switch.>

Is the clutch switch and installa-
tion position OK?

Go to step

2.

Replace the clutch
switch. Or adjust
the installation
position.

ECM

R168

B:

1 2 3 4

5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20

1 2 3 4 5

B442

B445

B441

B437

B440

B434

5Dr

B441

B440

B442

4Dr

B445

1

1

1

B99

1 2

3 4 5

6 7 8 9 10 11 12

F: B159

1
5

7

6

2

8

3 4

9

B437

B434

2

2

6

R3

B99

7

R168

B:

4Dr

4Dr

5Dr

5Dr

B159

F:

B15

7

F9

R3

B99

C15

B225

13
14

16

5

1

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

12

1

1

2

1

5

4

3

7

6

19

18

1 2
3 4

B65

4Dr

B65

1 2
3 4

5Dr

5Dr

4Dr

5Dr

4Dr

2

1

3

4

CC-00852

B225

2

1

B107

1 2

B107

1

2

B135

7

6

5

8

2

1

9

4

3

10

24 25

3

2

2

2

15

4

1

3

1

2

1

1

1

27

6

2

28

19

8

1

7

1

6

1

21

0

2

35

4

3

3

3

2

3

1

3

0

3

9

2

B:

B136

9

0

3

9

2

28

32

1

3

0

2

9

1

2

2

8

1

1

2

0

1

2

1

1

1

4

1

4

2

4

3

3

3

7

2

6

2

6

1

1

2

3

4

5

6

3

1

3

2

5

1

5

2

8

7

7

1

5

3

C:

C: B136

B: B135

B9

C3

2

1

3

4

B65

:

:

:

:

SBF-2

SBF-8

MAIN SBF

F/B No. 8

F/B No. 4

BATTERY

IGNITION

RELAY

STOP LIGHT

SWITCH &

BRAKE SWITCH

STOP LIGHT

SWITCH

BRAKE

SWITCH

RELAY BOX

7.5A

CLUTCH SWITCH

: 4 DOOR MODEL

: 5 DOOR MODEL

FUSE &

RELAY

BOX (F/B)

REF. TO

STOP LIGHT SYSTEM

REF. TO

STOP LIGHT SYSTEM

MULTI

JOINT

CONNECTOR

MUL

TI

JOINT

CONNECT

OR

CC(diag)-19

Diagnostic Procedure with Cancel Code

CRUISE CONTROL SYSTEM (DIAGNOSTICS)

2

CHECK CLUTCH SWITCH CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the clutch switch harness con-
nector.
3) Turn the ignition switch to ON.
4) Measure the voltage between harness con-
nector terminal and chassis ground.

Connector & terminal

(B107) No. 1 (+) — Chassis ground (–):

Is the voltage 10 V or more?

Go to step

3.

• Check fuse No. 4
(in fuse & relay
box).
• Check open or
shorted circuit of
harness between
clutch switch and
fuse & relay box.

3

CHECK CLUTCH SWITCH CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the harness connector of ECM.
3) Measure the resistance between clutch
switch harness connector terminal and ECM
harness connector terminal.

Connector & terminal

(B107) No. 2 — (B135) No. 9:

Is the resistance less than 10

Ω?

Replace the ECM.
<Ref. to FU(STI)-
59, Engine Control
Module (ECM).>
<Ref. to FU(w/o
STI)-57, Engine
Control Module
(ECM).>

Repair the har-
ness.

Step

Check

Yes

No

CC(diag)-20

Diagnostic Procedure with Cancel Code

CRUISE CONTROL SYSTEM (DIAGNOSTICS)

D: 14

Detected when select lever is set in the neutral position, or when malfunction related to neutral position

switch occurs.

TROUBLE SYMPTOM:

Cruise control cannot be set.

WIRING DIAGRAM:

Cruise Control System <Ref. to WI-163, WIRING DIAGRAM, Cruise Control System.>

Step

Check

Yes

No

1

CHECK NEUTRAL POSITION SWITCH CIR-
CUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the neutral position switch har-
ness connector.
3) Turn the ignition switch to ON.
4) Measure the voltage between harness con-
nector terminal and chassis ground.

Connector & terminal

(T12) No. 1 (+) — Chassis ground (–):

Is the voltage 10 V or more?

Go to step

2.

Check for open or
short in the har-
ness between neu-
tral position switch
and ECM.

2

CHECK NEUTRAL POSITION SWITCH CIR-
CUIT.
1) Turn the ignition switch to OFF.
2) Measure resistance between harness con-
nector terminal of neutral position switch and
chassis ground.

Connector & terminal

(T12) No. 2 — Chassis ground:

Is the resistance less than 10

Ω?

Go to step

3.

Repair the har-
ness.

ECM

B128

1 2
3 4

B128

1

3

4 5 6

2

:

:

*

3

*

2

*

1

*

1

*

2

*

3

*

3

C: B136

5

3

4

3

3

3

6

2

7

2

6

5

4

3

2

1

1

3

2

3

9

2

3

2

2

2

1

2

8

2

0

2

9

1

8

1

7

1

7 8 9

0

3

4

2

5

2

5

1

4

1

3

1

2

1

1

1

0

1

6

1

T12

2

1

B122

3 4
7 8

1 2
5 6

B136

C:

C35

C4

T9

B128

T2

1

2

T12

B122

CC-00853

SI

ES

SI

ES

JOINT

CONNECTOR

NEUTRAL

POSITION SWITCH

: WITH SI-DRIVE

: WITHOUT SI-DRIVE

: WITHOUT SI-DRIVE : 1

WITH SI-DRIVE : 2

: WITHOUT SI-DRIVE : 3

WITH SI-DRIVE : 5

: TERMINAL No. OPTIONAL

ARRANGEMENT