Subaru Legacy (2005 year). Manual — part 1018

CC(diag)-9

CRUISE CONTROL SYSTEM (DIAGNOSTICS)

Subaru Select Monitor

9) If the cruise speed is canceled by itself (without
doing any cancel operations), DTC will display on
the screen when selecting the {Check Cancel
Code} and pressing the [YES] key on the engine
malfunction diagnosis display screen.

CAUTION:
• When performing diagnostics, observe the
legal speed of the road.
• DTC will also displayed when cruise control
cancel is effected by driver. Do not confuse.
• Put a co-worker in the vehicle to assist the di-
agnosis during driving.

NOTE:
DTC will be cleared by turning ignition switch or
cruise control main switch to OFF.

3. REAL-TIME DIAGNOSIS

1) Connect the Subaru Select Monitor.
2) Turn the ignition switch and cruise control main
switch to ON.
3) Turn the Subaru Select Monitor power switch to
ON.
4) On the « Main Menu» display screen, select the
{Each System Check} and press the [YES] key.
5) On the «System Selection Menu» display
screen, select the {Engine} and press the [YES]
key.
6) Press the [YES] key after the information of en-
gine type is displayed.
7) On the «Cruise Control Diagnosis» display
screen, select the {Current Data Display/Save},
and then press the [YES] key.
8) Make sure that normal indication is displayed
when operated as follows:
• Depress/release the brake pedal. (Stop light
switch and brake switch turn ON.)
• Turn the main switch to ON.
• Turn the “CANCEL” switch to ON.
• Turn ON the “SET/COAST” switch.
• Turn ON the “RESUME/ACCEL” switch.
• Depress or release the clutch pedal.
• Place the shift lever in any position except neu-
tral.

NOTE:
• For details concerning operation procedure, re-
fer to the SUBARU SELECT MONITOR OPERA-
TION MANUAL.
• For DTC, refer to “List of Diagnostic Trouble
Code (DTC)”. <Ref. to CC(diag)-12, List of Diag-
nostic Trouble Code (DTC).>

CC(diag)-10

CRUISE CONTROL SYSTEM (DIAGNOSTICS)

Diagnostics with Phenomenon

6. Diagnostics with Phenomenon

A: DIAGNOSTIC PROCEDURE WITH PHENOMENON

Phenomenon

Checking item

Reference

Cruise control main switch is
not turned to ON. (Cruise
indicator light does not illumi-
nate.)

(1) Check the cruise indicator
light.

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

(2) Check the cruise control
command switch.

<Ref. to CC(diag)-15, DTC 11, 15, 21 AND 24 CRUISE
CONTROL COMMAND SWITCH, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>

Cruise control cannot be set.

(1) Check the cruise control
command switch.

<Ref. to CC(diag)-15, DTC 11, 15, 21 AND 24 CRUISE
CONTROL COMMAND SWITCH, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>

(2) Check the stop light switch
and brake switch.

<Ref. to CC(diag)-18, DTC 12 AND 25 STOP LIGHT
SWITCH AND BRAKE SWITCH, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>

(3) Check the clutch switch.

<Ref. to CC(diag)-21, DTC 13 CLUTCH SWITCH, Diag-
nostic Procedure with Diagnostic Trouble Code (DTC).>

(4) Check the neutral posi-
tion switch.

<Ref. to CC(diag)-24, DTC 14 NEUTRAL POSITION
SWITCH, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>

(5) Check the vehicle speed
sensor.

<Ref. to CC(diag)-32, DTC 22 AND 32 VEHICLE SPEED
SENSOR, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>

Cruise set indicator light does
not illuminate.

Check the cruise set indicator
light.

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

Vehicle speed is not held
within set speed

±3 km/h (±2

MPH).

Inspect the vehicle speed
sensor.

<Ref. to CC(diag)-32, DTC 22 AND 32 VEHICLE SPEED
SENSOR, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>

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

Check the RESUME/ACCEL
switch.

<Ref. to CC(diag)-15, DTC 11, 15, 21 AND 24 CRUISE
CONTROL COMMAND SWITCH, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>

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

Check the SET/COAST
switch.

<Ref. to CC(diag)-15, DTC 11, 15, 21 AND 24 CRUISE
CONTROL COMMAND SWITCH, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>

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

Check the CANCEL switch.

<Ref. to CC(diag)-15, DTC 11, 15, 21 AND 24 CRUISE
CONTROL COMMAND SWITCH, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>

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

Check the stop light switch
and brake switch.

<Ref. to CC(diag)-18, DTC 12 AND 25 STOP LIGHT
SWITCH AND BRAKE SWITCH, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>

Cruise control is not released
after shifting to the neutral
position.

Check the neutral position
switch.

<Ref. to CC(diag)-24, DTC 14 NEUTRAL POSITION
SWITCH, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>

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

Check the clutch switch.

<Ref. to CC(diag)-21, DTC 13 CLUTCH SWITCH, Diag-
nostic Procedure with Diagnostic Trouble Code (DTC).>

CC(diag)-11

CRUISE CONTROL SYSTEM (DIAGNOSTICS)

Diagnostics with Phenomenon

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

CHECK CRUISE INDICATOR LIGHT AND
CRUISE SET INDICATOR LIGHT.
1) Perform the self-diagnosis for combination
meter. <Ref. to IDI-3, SELF-DIAGNOSIS,
INSPECTION, Combination Meter System.>
2) Check the cruise indicator light and cruise
set indicator light illuminate.

Does the cruise indicator light
and cruise set indicator light
illuminate?

Go to step 2.

Replace the meter
case assembly.
<Ref. to IDI-15,
Combination
Meter.>

CHECK LAN COMMUNICATION CIRCUIT
ERROR DISPLAY.
1) Turn the ignition switch to ON again after
completing self-diagnosis.
2) Check that communication error is dis-
played on the odo/trip meter in combination
meter.

Is the error code “Er xx” dis-
played on odo/trip meter?

Check the LAN
communication cir-
cuit. <Ref. to
LAN(diag)-2, Basic
Diagnostic Proce-
dure.>

Replace the ECM.
<Ref. to FU(H4SO
2.0)-34, Engine
Control Module
(ECM).> <Ref. to
FU(H4SO 2.5)-37,
Engine Control
Module (ECM).>
<Ref. to
FU(H4DOTC)-34,
Engine Control
Module (ECM).>
<Ref. to
FU(H6DO)-34,
Engine Control
Module (ECM).>