Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 765

CC(diag)-21

Diagnostic Procedure with Cancel Code

CRUISE CONTROL SYSTEM (DIAGNOSTICS)

E: 15

Detected when CANCEL switch is pressed or malfunction related to main switch occurs.

TROUBLE SYMPTOM:

• Cruise control cannot be set. (Cancelled immediately.)

• Cruise control cannot be released.

Refer to DTC 11 for diagnostic procedure.

<Ref. to CC(diag)-14, 11, Diagnostic Procedure with Cancel Code.>

3

CHECK NEUTRAL POSITION SWITCH.
Check the neutral position switch. <Ref. to 6MT-
41, Neutral Position Switch.> <Ref. to 5MT-33,
Switches and Harness.>

Is the neutral position switch
OK?

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

Replace the neu-
tral position switch.

Step

Check

Yes

No

CC(diag)-22

Diagnostic Procedure with Cancel Code

CRUISE CONTROL SYSTEM (DIAGNOSTICS)

F: 16

Detected when ignition switch is turned to OFF or malfunction related to the ignition switch occurs.

TROUBLE SYMPTOM:

Cruise control cannot be set.

WIRING DIAGRAM:

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

G: 21

Cruise control command switch malfunction is detected.

TROUBLE SYMPTOM:

• Cruise control cannot be set. (Cancelled immediately.)

• Cruise control cannot be released.

Refer to DTC 11 for diagnostic procedure. <Ref. to CC(diag)-14, 11, Diagnostic Procedure with Cancel

Code.>

Step

Check

Yes

No

1

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

Connector & terminal

(B136) No. 30 (+) — Chassis ground (–):

Is the voltage 10 V or more?

Check for poor
contact of ECM
connector.

• Check fuse No.
12 (in fuse & relay
box).
• Check the har-
ness for open or
short circuit
between ignition
switch and ECM.

ECM

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

30

B136

CC-00840

SBF-6

MAIN SBF

F/B No. 12

BATTERY

IGNITION

SWITCH

CC(diag)-23

Diagnostic Procedure with Cancel Code

CRUISE CONTROL SYSTEM (DIAGNOSTICS)

H: 22

Malfunction related to vehicle speed sensor is detected.

DIAGNOSIS:

Open or shorted circuit in vehicle speed sensor system.

TROUBLE SYMPTOM:

Cruise control cannot be set. (Cancelled immediately.)

I: 24

Malfunction in cruise control-related switch is detected.

TROUBLE SYMPTOM:

• Cruise control cannot be set. (Cancelled immediately.)

• Cruise control cannot be released.

Refer to DTC 11 for diagnostic procedure.

<Ref. to CC(diag)-14, 11, Diagnostic Procedure with Cancel Code.>

J: 31

Engine speed signal malfunction is detected.

Abnormal increase of engine speed is detected.

Gear is placed in 1st or Reverse position.

After driving at the 2nd gear position or higher, perform the cruise setting again. If a cancel code is not de-

tected, it is normal.

K: 32

Detected when the vehicle speed is out of the system controllable range.

Increase vehicle speed high enough to allow the cruise control to function, and then perform setting operation

again.

If cancel code is still detected after setting cruise again, perform the diagnosis for DTC 22.

Refer to DTC 22 for diagnostic procedure.

<Ref. to CC(diag)-23, 22, Diagnostic Procedure with Cancel Code.>

Step

Check

Yes

No

1

CHECK ABS OR VDC WARNING LIGHT.
1) Turn the ignition switch to ON.
2) After the initial operation of the combination
meter is completed, check whether the VDC
warning light continues to illuminate.

Does the warning light continue
to illuminate?

Check the
VDCCM. <Ref. to
VDC(diag)-2,
Basic Diagnostic
Procedure.>

Go to step

2.

2

CHECK DTC OF LAN COMMUNICATION
CIRCUIT.
Read the DTC of body integrated unit using
Subaru Select Monitor.

Is DTC of low-speed CAN dis-
played?

Check the LAN
communication cir-
cuit.

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

CC(diag)-24

Diagnostic Procedure with Cancel Code

CRUISE CONTROL SYSTEM (DIAGNOSTICS)

L: 34

The vehicle has been driven at a speed higher than set speed for a long time (approximately 10 minutes) dur-

ing cruise driving.

This cancel code is detected when driving for a long period of time at a speed higher than appropriate for

cruise control setting by operating the accelerator pedal.

Perform the cruise control setting operation again. If the cancel code is not detected, it is normal.

M: 35

Detected when it is impossible to perform the vehicle speed feedback.

Set vehicle speed cannot be kept for some reasons (steep uphill, unreleased parking brake, etc.) during

cruise driving.

Cancel code is detected when driving condition is not suitable for cruise control.

Perform cruise set operation again after clearing the possible cause.

N: 41

VDC/TCS has operated.

Vehicle dynamics control (VDC) or TCS is operated during cruise driving or cruise setting.

<Ref. to VDC(diag)-2, PROCEDURE, Basic Diagnostic Procedure.>

O: 43

ABS/VDC malfunction is detected.

VDC malfunction is detected during cruise driving or cruise setting.

<Ref. to VDC(diag)-2, PROCEDURE, Basic Diagnostic Procedure.>

P: 44

Body integrated unit malfunction is detected.

Body integrated unit system malfunction is detected during cruise driving or cruise setting. <Ref. to LAN(di-

ag)-2, PROCEDURE, Basic Diagnostic Procedure.>

Q: 45

Combination meter malfunction is detected.

Combination meter malfunction is detected during cruise driving or cruise setting. <Ref. to LAN(diag)-2,

PROCEDURE, Basic Diagnostic Procedure.>

R: 61

Malfunction in the stop light & brake switch is detected.

TROUBLE SYMPTOM:

• Cruise control cannot be set.

• Cruise control cannot be released.

Refer to DTC 12 for diagnostic procedure. <Ref. to CC(diag)-16, 12, Diagnostic Procedure with Cancel

Code.>

S: 62

Neutral position switch malfunction is detected.

TROUBLE SYMPTOM:

Cruise control cannot be set.

Refer to DTC 14 for diagnostic procedure.

<Ref. to CC(diag)-20, 14, Diagnostic Procedure with Cancel Code.>