Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 762

CC(diag)-9

Diagnostics with Phenomenon

CRUISE CONTROL SYSTEM (DIAGNOSTICS)

6. Diagnostics with Phenomenon

A: DIAGNOSTIC PROCEDURE WITH PHENOMENON

Phenomenon

Check item

Index

1

Cruise control main switch is
not turned to ON. (Cruise indi-
cator light does not illuminate.)
Or cruise control is cancelled
without operating the cruise
control command switch.

(1) Perform cruise cancel
conditions diagnosis.

Perform the diagnosis according to displayed cancel code.

(2) Perform the real-time
diagnosis.

Check the input signal of cruise control system.

(3) Check the cruise control
command switch.

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

(4) Check the cruise indica-
tor light.

<Ref. to CC(diag)-11, CHECK CRUISE INDICATOR LIGHT
AND CRUISE SET INDICATOR LIGHT, Diagnostics with
Phenomenon.>

2

Cruise control cannot be set.
Or cruise control is cancelled
without releasing operation.

(1) Perform cruise cancel
conditions diagnosis.

Perform the diagnosis according to displayed cancel code.

(2) Perform the real-time
diagnosis.

Check the input signal of cruise control system.

(3) Check the cruise control
command switch.

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

(4) Check stop light switch
and brake switch.

<Ref. to BR-47, Brake Pedal.> <Ref. to CC(diag)-16, 12,
Diagnostic Procedure with Cancel Code.>

(5) Check clutch switch.

<Ref. to CL-33, Clutch Switch.> <Ref. to CC(diag)-18, 13,
Diagnostic Procedure with Cancel Code.>

(6) Check the neutral posi-
tion switch.

<Ref. to CC(diag)-20, 14, Diagnostic Procedure with Cancel
Code.> <Ref. to CC(diag)-24, 62, Diagnostic Procedure
with Cancel Code.>

(7) Check vehicle speed
sensor.

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

3

Cruise set indicator light does
not illuminate.

Check the cruise set indica-
tor light.

<Ref. to CC(diag)-11, CHECK CRUISE INDICATOR LIGHT
AND CRUISE SET INDICATOR LIGHT, Diagnostics with
Phenomenon.>

4

Vehicle speed is not held within
set speed ±3 km/h (±2 MPH).

Check the vehicle speed
sensor.

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

5

Vehicle speed does not
increase or does not return to
set speed after RESUME/
ACCEL switch has been
pressed.

(1) Perform the real-time
diagnosis.

Check the input signal of cruise control system.

(2) Check the RESUME/
ACCEL switch.

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

6

Vehicle speed does not
decrease after SET/COAST
switch has been pressed.

(1) Perform the real-time
diagnosis.

Check the input signal of cruise control system.

(2) Check the SET/COAST
switch.

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

7

Cruise control is not released
after CANCEL switch has been
pressed.

(1) Perform the real-time
diagnosis.

Check the input signal of cruise control system.

(2) Check the CANCEL
switch.

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

8

Cruise control is not released
after brake pedal has been
depressed.

(1) Perform the real-time
diagnosis.

Check the input signal of cruise control system.

(2) Check stop light switch
and brake switch.

<Ref. to CC(diag)-16, 12, Diagnostic Procedure with Cancel
Code.> <Ref. to BR-49, INSTALLATION, Stop Light
Switch.>

9

Cruise control is not released
after shifting to the neutral posi-
tion.

(1) Perform the real-time
diagnosis.

Check the input signal of cruise control system.

(2) Check the neutral posi-
tion switch.

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

CC(diag)-10

Diagnostics with Phenomenon

CRUISE CONTROL SYSTEM (DIAGNOSTICS)

10

Cruise control is not released
after clutch pedal has been
depressed.

(1) Perform the real-time
diagnosis.

Check the input signal of cruise control system.

(2) Check clutch switch.

<Ref. to CC(diag)-18, 13, Diagnostic Procedure with Cancel
Code.>

Phenomenon

Check item

Index

CC(diag)-11

Diagnostics with Phenomenon

CRUISE CONTROL SYSTEM (DIAGNOSTICS)

B: CHECK CRUISE INDICATOR LIGHT AND CRUISE SET INDICATOR LIGHT

TROUBLE SYMPTOM:

Cruise control can be set, but the cruise indicator light and cruise set indicator light do not illuminate.

Step

Check

Yes

No

1

CHECK CRUISE INDICATOR LIGHT AND
CRUISE SET INDICATOR LIGHT.
1) Perform the self-diagnosis of combination
meter. <Ref. to IDI-5, SELF-DIAGNOSIS,
INSPECTION, Combination Meter System.>
2) Check the cruise indicator light and cruise
set indicator light if they illuminate.

Do the cruise indicator light and
cruise set indicator light illumi-
nate?

Go to step

2.

Replace the meter
case assembly.
<Ref. to IDI-16,
Combination
Meter.>

2

CHECK DTC OF LAN COMMUNICATION
CIRCUIT.
1) Complete self-diagnosis, and turn the igni-
tion switch to ON again.
2) 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. <Ref. to
LAN(diag)-2, Basic
Diagnostic Proce-
dure.>

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)-12

List of Cancel Code

CRUISE CONTROL SYSTEM (DIAGNOSTICS)

7. List of Cancel Code

A: LIST

NOTE:

• The cancel code is registered even when cancel is performed intentionally by the driver.

• Cancel codes are cleared if the ignition switch is turned to OFF.

• If a different cancel code is input after a cancel code (latest code) has been input, the latest code is over-

written.

• If the cruise indicator light is flashing, a malfunction is occurring in the system or cruise control related

switch. The cancel code at this time is saved even after ignition switch is OFF as a memory code of a past

malfunction.

• To display a cancel code, use the Subaru Select Monitor to read the code after the cruise control is deac-

tivated during a driving test.

Cancel

code

Item

Contents of diagnosis

Note

11

Main Switch

Main switch of cruise control command switch is
turned to OFF, and then the cruise control is
released.

This code is displayed without oper-
ating the main switch. <Ref. to
CC(diag)-14, 11, Diagnostic Proce-
dure with Cancel Code.>

12

Stop Light & Brake
Switch

Stop light switch or brake switch is turned to ON,
and then the cruise control is released.

This code is displayed without
depressing the brake pedal. <Ref. to
CC(diag)-16, 12, Diagnostic Proce-
dure with Cancel Code.>

13

Clutch Switch

Clutch switch is turned to ON, and then the cruise
control is released.

This code is displayed without
depressing the clutch pedal. <Ref. to
CC(diag)-18, 13, Diagnostic Proce-
dure with Cancel Code.>

14

Neutral Position Switch

Neutral position switch is turned to ON, and then
the cruise control is released.

This code is displayed without shift-
ing to neutral position. <Ref. to
CC(diag)-20, 14, Diagnostic Proce-
dure with Cancel Code.>

15

Cancel Switch

Cancel switch is turned to ON, and then the cruise
control is released.

This code is displayed without oper-
ating the cancel switch. <Ref. to
CC(diag)-21, 15, Diagnostic Proce-
dure with Cancel Code.>

16

Ignition switch

Ignition switch is turned to OFF, and then the
cruise control is released.

This code is displayed without oper-
ating the ignition switch. <Ref. to
CC(diag)-22, 16, Diagnostic Proce-
dure with Cancel Code.>

21

Cruise control switch
malfunction when igni-
tion switch is turned to
ON

When the ignition switch is turned to ON, each
switch of cruise control command switch is already
turned to ON.

This code is displayed when the igni-
tion switch is turned to ON without
operating the cruise control com-
mand switch. <Ref. to CC(diag)-22,
21, Diagnostic Procedure with Can-
cel Code.>

22

Abnormality of change
in vehicle speed

Malfunction of vehicle speed signal variation is
detected.

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

24

Abnormality of switches
related to cruise control

Open circuit of the cruise control switch is detected
during cruise driving. (The system is judged as
model without cruise control.)

This code is displayed with normal
operation. <Ref. to CC(diag)-23, 24,
Diagnostic Procedure with Cancel
Code.>

31

Abnormal engine speed
Signal

• Abnormal increase of engine speed is detected.
• Gear is placed in Neutral, 1st or Reverse posi-
tion.

Cruise in 2nd shift position or more.
<Ref. to CC(diag)-23, 31, Diagnostic
Procedure with Cancel Code.>