Subaru Legacy 2002 Service Manual page 3309

Cruise Control System (Diagnostics)
1. Basic Diagnostic Procedure
A: PROCEDURE
No.
1 START DIAGNOSIS.
1) Perform pre-inspection. <Ref. to CC-5,
INSPECTION, General Description.>
2) Check cruise control main switch operation.
2 PREPARE SUBARU SELECT MONITOR.
3 PERFORM CRUISE CANCEL CONDITIONS
DIAGNOSIS.
Perform cruise cancel conditions diagnosis.
<Ref. to CC-9, Subaru Select Monitor.>
4 CHECK CRUISE CONTROL SET OPERA-
TION.
Check cruise control set operation.
5 CHECK VEHICLE SPEED IS HELD WITHIN
SET SPEED.
Make sure vehicle speed is held within set
speed.
6 CHECK RESUME/ACCEL OPERATION.
Check RESUME/ACCEL operation.
7 CHECK SET/COAST OPERATION.
Check SET/COAST operation.
8 CHECK CANCEL OPERATION.
Check CANCEL operation.
9 CHECK CRUISE CONTROL RELEASE
OPERATION.
Check cruise control release operation.
BASIC DIAGNOSTIC PROCEDURE
S003501E45
Step
S003501
Check
Is cruise control main
switch turned ON?
Is the select monitor avail-
able?
Is trouble code indicated?
Can cruise control be set
while driving at 40 km/h (25
MPH)?
Is vehicle speed held within
set speed ±3 km/h (±2
MPH) ?
Does vehicle speed
increase or return to set
speed after RESUME/
ACCEL switch has been
pressed?
Does vehicle speed
decrease after SET/COAST
switch has been pressed?
Is cruise control released
after CANCEL switch has
been pressed?
Is cruise control released
after brake pedal has been
depressed?
CC-2
Yes
Go to step 2. Go to symptom 1.
<Ref. to CC-11,
SYMPTOM
CHART, Diagnos-
tics Chart with
Symptom.>
Go to step 3. Go to step 4.
Go to "List of Go to step 4.
Diagnostic
Trouble Code
(DTC)". <Ref. to
CC-27, List of
Diagnostic
Trouble Code
(DTC).>
Go to step 5. Go to symptom 2.
<Ref. to CC-11,
SYMPTOM
CHART, Diagnos-
tics Chart with
Symptom.>
Go to step 6. Go to symptom 3.
<Ref. to CC-11,
SYMPTOM
CHART, Diagnos-
tics Chart with
Symptom.>
Go to step 7. Go to symptom 4.
<Ref. to CC-11,
SYMPTOM
CHART, Diagnos-
tics Chart with
Symptom.>
Go to step 8. Go to symptom 5.
<Ref. to CC-11,
SYMPTOM
CHART, Diagnos-
tics Chart with
Symptom.>
Go to step 9. Go to symptom 6.
<Ref. to CC-11,
SYMPTOM
CHART, Diagnos-
tics Chart with
Symptom.>
Go to step 10. Go to symptom 7.
<Ref. to CC-11,
SYMPTOM
CHART, Diagnos-
tics Chart with
Symptom.>
No