Subaru Impreza 2003 Service Manual page 3246

CRUISE CONTROL SYSTEM (DIAGNOSTICS)
1. Basic Diagnostic Procedure
A: PROCEDURE
Step
1 START DIAGNOSIS.
1)Perform the pre-inspection. <Ref. to CC-4,
INSPECTION, General Description.>
2)Check the cruise control main switch opera-
tion.
2 PREPARE SUBARU SELECT MONITOR.
3 PERFORM CRUISE CANCEL CONDITIONS
DIAGNOSIS.
Perform the cruise cancel conditions diagno-
sis. <Ref. to CC-8, Subaru Select Monitor.>
4 CHECK CRUISE CONTROL SET OPERA-
TION.
Check the cruise control set operation.
5 CHECK VEHICLE SPEED IS HELD WITHIN
SET SPEED.
Make sure the vehicle speed is held within set
speed.
6 CHECK RESUME/ACCEL OPERATION.
Check the RESUME/ACCEL operation.
7 CHECK SET/COAST OPERATION.
Check the SET/COAST operation.
8 CHECK CANCEL OPERATION.
Check the CANCEL operation.
9 CHECK CRUISE CONTROL RELEASE OP-
ERATION.
Check the cruise control release operation.
10 CHECK CRUISE CONTROL RELEASE OP-
ERATION.
Check the cruise control release operation.
BASIC DIAGNOSTIC PROCEDURE
Is the cruise control main
switch turned ON?
Is the select monitor available? Go to step 3.
Are any DTC indicated?
Can the cruise control be set
while driving at 40 km/h (25
MPH)?
Is the vehicle speed held within
set speed ±3 km/h (±2 MPH)?
Does the vehicle speed
increase or return to set speed
after RESUME/ACCEL switch
has been pressed?
Does the vehicle speed
decrease after SET/COAST
switch has been pressed?
Is the cruise control released
after CANCEL switch has been
pressed?
Is the cruise control released
after brake pedal has been
depressed?
Is the cruise control released
after clutch pedal has been
depressed? (MT model)
CC-2
Check
Go to step 2.
Go to "List of
DTC". <Ref. to
CC-24, List of
DTC.>
Go to step 5.
Go to step 6.
Go to step 7.
Go to step 8.
Go to step 9.
Go to step 10.
Finish the diag-
nostics.
Yes No
Go to symptom 1.
<Ref. to CC-10,
SYMPTOM
CHART, Diagnos-
tic Procedure with
Symptom.>
Go to step 4.
Go to step 4.
Go to symptom 2.
<Ref. to CC-10,
SYMPTOM
CHART, Diagnos-
tic Procedure with
Symptom.>
Go to symptom 3.
<Ref. to CC-10,
SYMPTOM
CHART, Diagnos-
tic Procedure with
Symptom.>
Go to symptom 4.
<Ref. to CC-10,
SYMPTOM
CHART, Diagnos-
tic Procedure with
Symptom.>
Go to symptom 5.
<Ref. to CC-10,
SYMPTOM
CHART, Diagnos-
tic Procedure with
Symptom.>
Go to symptom 6.
<Ref. to CC-10,
SYMPTOM
CHART, Diagnos-
tic Procedure with
Symptom.>
Go to symptom 7.
<Ref. to CC-10,
SYMPTOM
CHART, Diagnos-
tic Procedure with
Symptom.>
Go to symptom 8.
<Ref. to CC-10,
SYMPTOM
CHART, Diagnos-
tic Procedure with
Symptom.>