Subaru Legacy (2005 year). Service manual — part 1016
CRUISE CONTROL SYSTEM
(DIAGNOSTICS)
CC(diag)
Page
Basic Diagnostic Procedure . . . . . . . . . . . . . . . . . . 2
General Description . . . . . . . . . . . . . . . . . . . . . 4
Electrical Component Location . . . . . . . . . . . . . . . . ...5
Engine Control Module (ECM) I/O Signal . . . . . . . . . . . . ...6
Subaru Select Monitor. . . . . . . . . . . . . . . . . . . . .8
Diagnostics with Phenomenon. . . . . . . . . . . . . . . . ..10
List of Diagnostic Trouble Code (DTC) . . . . . . . . . . . . . .12
Diagnostic Procedure with Diagnostic Trouble Code (DTC) . . . . . .15
CC(diag)-2
CRUISE CONTROL SYSTEM (DIAGNOSTICS)
Basic Diagnostic Procedure
1. Basic Diagnostic Procedure
A: PROCEDURE
Step
Check
Yes
No
1
CHECK MALFUNCTION INDICATOR LIGHT.
Ensure the malfunction indicator light illumi-
nates.
Does the malfunction indicator
light illuminate?
2
CHECK CRUISE INDICATOR LIGHT.
Ensure the cruise indicator light blinks.
Does the cruise indicator light
blink?
3
CHECK CRUISE CONTROL MAIN SWITCH
OPERATION.
Check the cruise control main switch opera-
tion. (Ensure the cruise indicator light illumi-
nates.)
Is the cruise control main
switch turned ON? (Does the
cruise indicator light illumi-
nate?)
Go to phenome-
non 1. <Ref. to
CC(diag)-10,
DIAGNOSTIC
PROCEDURE
WITH PHENOME-
NON, Diagnostics
with Phenome-
non.>
4
CHECK CRUISE CONTROL SET OPERA-
TION.
Check the cruise control set operation.
Can the cruise control be set
while driving at more than 40
km/h (25 MPH)?
5
PERFORM CRUISE CONTROL CANCEL
CONDITIONS DIAGNOSIS.
Perform the cruise cancel conditions diagno-
sis.
Is DTC displayed?
Go to “List of Diag-
nostic Trouble
Code (DTC)”.
<Ref. to CC(diag)-
12, List of Diag-
nostic Trouble
Code (DTC).>
Go to phenome-
non 2. <Ref. to
CC(diag)-10,
DIAGNOSTIC
PROCEDURE
WITH PHENOME-
NON, Diagnostics
with Phenome-
non.>
6
CHECK CRUISE SET INDICATOR LIGHT.
Ensure the cruise set indicator light illuminates.
Does the cruise set indicator
light illuminate?
Go to phenome-
non 3. <Ref. to
CC(diag)-10,
DIAGNOSTIC
PROCEDURE
WITH PHENOME-
NON, Diagnostics
with Phenome-
non.>
7
CHECK VEHICLE SPEED IS HELD WITHIN
SET SPEED.
Make sure the vehicle speed is held within set
speed.
Is vehicle speed held within set
speed
±3 km/h (±2 MPH)?
(Make an inspection on a level
road.)
Go to phenome-
non 4. <Ref. to
CC(diag)-10,
DIAGNOSTIC
PROCEDURE
WITH PHENOME-
NON, Diagnostics
with Phenome-
non.>
8
CHECK RESUME/ACCEL OPERATION.
Check the RESUME/ACCEL switch operation.
Does the vehicle speed
increase or return to set speed
after RESUME/ACCEL switch
has been pressed?
Go to phenome-
non 5. <Ref. to
CC(diag)-10,
DIAGNOSTIC
PROCEDURE
WITH PHENOME-
NON, Diagnostics
with Phenome-
non.>
CC(diag)-3
CRUISE CONTROL SYSTEM (DIAGNOSTICS)
Basic Diagnostic Procedure
9
CHECK SET/COAST OPERATION.
Check the SET/COAST switch operation.
Does the vehicle speed
decrease after SET/COAST
switch has been pressed?
Go to phenome-
non 6. <Ref. to
CC(diag)-10,
DIAGNOSTIC
PROCEDURE
WITH PHENOME-
NON, Diagnostics
with Phenome-
non.>
10
CHECK CANCEL OPERATION.
Check the CANCEL switch operation.
Is the cruise control released
after CANCEL switch has been
pressed?
Go to phenome-
non 7. <Ref. to
CC(diag)-10,
DIAGNOSTIC
PROCEDURE
WITH PHENOME-
NON, Diagnostics
with Phenome-
non.>
11
CHECK CRUISE CONTROL RELEASE OP-
ERATION.
Check the cruise control release operation.
Is the cruise control released
after brake pedal has been
depressed?
Go to phenome-
non 8. <Ref. to
CC(diag)-10,
DIAGNOSTIC
PROCEDURE
WITH PHENOME-
NON, Diagnostics
with Phenome-
non.>
12
CHECK CRUISE CONTROL RELEASE OP-
ERATION.
Check the cruise control release operation.
Is the cruise control released
after shifting to the neutral
position?
Go to phenome-
non 9. <Ref. to
CC(diag)-10,
DIAGNOSTIC
PROCEDURE
WITH PHENOME-
NON, Diagnostics
with Phenome-
non.>
13
CHECK CRUISE CONTROL RELEASE OP-
ERATION.
Check the cruise control release operation.
Is the cruise control released
after depressing the clutch
pedal?
Finish the diagno-
sis.
Go to phenome-
non 10. <Ref. to
CC(diag)-10,
DIAGNOSTIC
PROCEDURE
WITH PHENOME-
NON, Diagnostics
with Phenome-
non.>
Step
Check
Yes
No
CC(diag)-4
CRUISE CONTROL SYSTEM (DIAGNOSTICS)
General Description
2. General Description
A: CAUTION
Airbag system wiring harness is routed near the cruise control command switch.
CAUTION:
• All airbag system wiring harnesses and connectors are yellow. Do not use the electrical test equip-
ment on these circuits.
• Be careful not to damage the airbag system wiring harness when servicing the cruise control com-
mand switch.
B: PREPARATION TOOL
1. SPECIAL TOOL
2. GENERAL TOOL
C: INSPECTION
Measure the battery voltage and specific gravity of electrolyte.
Standard voltage:
12 V or more
Specific gravity:
1.260 or more
ILLUSTRATION
TOOL NUMBER
DESCRIPTION
REMARKS
18482AA000
(Newly adapted tool)
CARTRIDGE
Troubleshooting for electrical system
22771AA030
SUBARU SELECT
MONITOR KIT
Troubleshooting for electrical system
• English: 22771AA030 (Without printer)
• German: 22771AA070 (Without printer)
• French: 22771AA080 (Without printer)
• Spanish: 22771AA090 (Without printer)
TOOL NAME
REMARKS
Circuit tester
Used for measuring resistance, voltage and ampere.
ST18482AA000
ST22771AA030
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