SUBARU FORESTER 2004 Service Repair Manual

CC(H4DOTC 2.5)-9
CRUISE CONTROL SYSTEM (DIAGNOSTIC)
Subaru Select Monitor
9) If the cruise speed is canceled itself (without do-
ing any cancel operations), DTC will appear on se-
lect monitor display after {Cancel Code(s) Display}
is selected on the Engine Diagnosis display screen
and [YES] key is pressed.
CAUTION:
 DTC will also appear when cruise cancel is ef-
fected by driver. Do not confuse.
 Have a co-worker ride in the vehicle to assist
in diagnosis during driving.
NOTE:
DTC will be cleared by turning the ignition switch or
cruise control main switch to OFF.
3. REAL-TIME DIAGNOSIS
1) Connect the select monitor.
2) Turn the ignition switch and cruise control main
switch to ON.
3) Turn the Subaru Select Monitor switch to ON.
4) On the «Main Menu» display screen, select the
{2. Each System Check} and press [YES] key.
5) On the «System Selection» display screen, se-
lect the {Engine} and press [YES] key.
6) Press the [YES] key after the information of en-
gine type displayed.
7) On the «Engine Diagnosis» display screen, se-
lect the {Current Data Display & Save} and press
[YES] key.
8) Make sure that normal indication is displayed
when controls are operated as indicated below:
 Depress/release the brake pedal. (Stop light
switch and brake switch turn ON.)
 Turn ON the “SET/COAST” switch.
 Turn ON the “RESUME/ACCEL” switch.
 Turn ON the “CANCEL” switch. (The “SET/
COAST” and “RESUME/ACCEL” switch are turned
ON at same time.)
 Depress/release the clutch pedal.
 Set the shift lever to except for neutral position.
NOTE:
 For detailed operation procedure, refer to the “SUB-
ARU SELECT MONITOR OPERATION MANUAL.”
 For details concerning DTCs, refer to the “List of
Diagnostic Trouble Code (DTC).” <Ref. to
CC(H4DOTC 2.5)-13, List of Diagnostic Trouble
Code (DTC).>

CC(H4DOTC 2.5)-10
CRUISE CONTROL SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Symptom
6. Diagnostic Procedure with Symptom
A: SYMPTOM CHART
Symptom Repair area Reference
1Cruise control main switch is
not turned to ON. (Cruise
indicator light does not illumi-
nate)(1) Check the cruise indicator
light.<Ref. to CC(H4DOTC 2.5)-11, CHECK CRUISE INDICA-
TOR LIGHT, Diagnostic Procedure with Symptom.>
(2) Check the cruise control
command switch.<Ref. to CC(H4DOTC 2.5)-16, DTC 11, 15, 21 AND 24
CRUISE CONTROL COMMAND SWITCH, Diagnostic
Procedure with Diagnostic Trouble Code (DTC).>
2 Cruise control cannot be set. (1) Check the cruise control
command switch<Ref. to CC(H4DOTC 2.5)-16, 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(H4DOTC 2.5)-18, DTC 12 AND 25 STOP
LIGHT SWITCH AND BRAKE SWITCH, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>
(3) Check the clutch switch.<Ref. to CC(H4DOTC 2.5)-20, DTC 13 CLUTCH
SWITCH, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
(4) Check the neutral switch.<Ref. to CC(H4DOTC 2.5)-22, DTC 14 NEUTRAL POSI-
TION SWITCH, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
(5) Check the vehicle speed
sensor.<Ref. to CC(H4DOTC 2.5)-26, DTC 22 AND 32 VEHICLE
SPEED SENSOR, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
3Vehicle speed is not held
within set speed ±3 km/h (±2
MPH). Check the vehicle speed sen-
sor.<Ref. to CC(H4DOTC 2.5)-26, DTC 22 AND 32 VEHICLE
SPEED SENSOR, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
4Vehicle 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(H4DOTC 2.5)-16, DTC 11, 15, 21 AND 24
CRUISE CONTROL COMMAND SWITCH, Diagnostic
Procedure with Diagnostic Trouble Code (DTC).>
5Vehicle speed does not
decrease after SET/COAST
switch has been pressed. Check the SET/COAST
switch.<Ref. to CC(H4DOTC 2.5)-16, DTC 11, 15, 21 AND 24
CRUISE CONTROL COMMAND SWITCH, Diagnostic
Procedure with Diagnostic Trouble Code (DTC).>
6Cruise control is not released
after CANCEL switch has
been pressed.Check the CANCEL switch.<Ref. to CC(H4DOTC 2.5)-16, DTC 11, 15, 21 AND 24
CRUISE CONTROL COMMAND SWITCH, Diagnostic
Procedure with Diagnostic Trouble Code (DTC).>
7Cruise control is not released
after the brake pedal has
been depressed. Check the stop light switch
and brake switch.<Ref. to CC(H4DOTC 2.5)-18, DTC 12 AND 25 STOP
LIGHT SWITCH AND BRAKE SWITCH, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>
8Cruise control is not released
after the clutch pedal has
been depressed.Check the clutch switch.<Ref. to CC(H4DOTC 2.5)-20, DTC 13 CLUTCH
SWITCH, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
9Cruise control is not released
after shifting to neutral posi-
tion.Check the neutral switch.<Ref. to CC(H4DOTC 2.5)-22, DTC 14 NEUTRAL POSI-
TION SWITCH, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>

CC(H4DOTC 2.5)-11
CRUISE CONTROL SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Symptom
B: CHECK CRUISE INDICATOR LIGHT
TROUBLE SYMPTOM:
Cruise control can be set, but cruise indicator light does not illuminate.
WIRING DIAGRAM:
CC-00255
i10i3
123456789101112131415161718192021222324252627282930
B134
9
30 29 28 323120 19 18 222110 121114
24
34 3327 2617 16123456713
2315
258
B136
9
30 29 28 323120 19 18 22211012
1114
24
34 3327
261612345613
2315
25871735
C: A:
B161
219
32
1234
5610 11 12 13 14 15716
23 3019 20
22 26 27 28 29817
24 3118
25
COMBINATION METERSBF-4F/B No.18
B38
i3F/B No.14
16
BATTERYIGNITION
SWITCH
CRUISE CONTROL
MAIN SWITCH
ILLUMINATION
CIRCUIT
A15
C716
i2
B37
5
3B161
9 9i10
B134
A:
B136
C:ECM CRUISE
INDICATOR
LIGHTCUSTOM
CPU
12
3456
i2
123 8
910411 12 13 14 15 165671718

CC(H4DOTC 2.5)-12
CRUISE CONTROL SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Symptom
Step Check Yes No
1 CHECK CRUISE INDICATOR LIGHT CIR-
CUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the combination meter harness
connector.
3) Turn the ignition switch to ON.
4) Measure the voltage between harness con-
nector terminal and chassis ground.
Connector & terminal
(i10) No. 9 (+) — Chassis ground (
−):Is the voltage more than 10 V? Go to step 2. Check the fuse
No. 14 (in fuse &
relay box).
 Check the har-
ness for open or
short between
combination meter
and fuse & relay
box.
2 CHECK CRUISE INDICATOR LIGHT CIR-
CUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the ECM harness connector.
3) Measure the resistance between ECM har-
ness connector terminal and combination
meter harness connector terminal.
Connector & terminal
(B134) No. 15 — (i10) No. 16:Is the resistance less than 10
Ω?Go to step 3.Repair the har-
ness.
3 CHECK CRUISE INDICATOR LIGHT CIR-
CUIT.
Ground the ECM harness connector terminal
with a suitable wire.
Connector & terminal
(B134) No. 15 — Chassis ground:Does the cruise indicator light
illuminate?Check the poor
contact of ECM
connector.Replace the meter
main assembly.

CC(H4DOTC 2.5)-13
CRUISE CONTROL SYSTEM (DIAGNOSTIC)
List of Diagnostic Trouble Code (DTC)
7. List of Diagnostic Trouble Code (DTC)
A: LIST
DTC Item Contents of diagnosis Reference
11 Main switch Cruise control is released after the main switch of cruise
control command switch is turned to OFF.This DTC is indicated
without operating the main
switch. <Ref. to
CC(H4DOTC 2.5)-16,
DTC 11, 15, 21 AND 24
CRUISE CONTROL
COMMAND SWITCH,
Diagnostic Procedure with
Diagnostic Trouble Code
(DTC).>
12 Stop and brake switch Cruise control is released after the stop light switch or
brake switch is turned to ON.This DTC is indicated
without depressing the
brake pedal. <Ref. to
CC(H4DOTC 2.5)-18,
DTC 12 AND 25 STOP
LIGHT SWITCH AND
BRAKE SWITCH, Diag-
nostic Procedure with
Diagnostic Trouble Code
(DTC).>
13 Clutch switch Cruise control is released after the clutch switch is
turned to ON.This DTC is indicated
without depressing the
clutch pedal. <Ref. to
CC(H4DOTC 2.5)-20,
DTC 13 CLUTCH
SWITCH, Diagnostic Pro-
cedure with Diagnostic
Trouble Code (DTC).>
14 Neutral switch Cruise control is released after the neutral position
switch is turned to ON.This DTC is indicated
without shifting to neutral
position. <Ref. to
CC(H4DOTC 2.5)-22,
DTC 14 NEUTRAL POSI-
TION SWITCH, Diagnos-
tic Procedure with
Diagnostic Trouble Code
(DTC).>
15 Cancel switch Cruise control is released after the cancel switch is
turned to ON.This DTC is indicated
without operating the can-
cel switch. <Ref. to
CC(H4DOTC 2.5)-16,
DTC 11, 15, 21 AND 24
CRUISE CONTROL
COMMAND SWITCH,
Diagnostic Procedure with
Diagnostic Trouble Code
(DTC).>
16 Ignition switch Cruise control is released after the ignition switch is
turned to OFF.This DTC is indicated
without operating the igni-
tion switch. <Ref. to
CC(H4DOTC 2.5)-24,
DTC 16 IGNITION
SWITCH, Diagnostic Pro-
cedure with Diagnostic
Trouble Code (DTC).>

CC(H4DOTC 2.5)-14
CRUISE CONTROL SYSTEM (DIAGNOSTIC)
List of Diagnostic Trouble Code (DTC)
21 Cruise control switch is
abnormal when the igni-
tion switch is turned to ON.Each switch of cruise control command switch has
already been ON when the ignition switch is turned to
ON.This DTC is indicated
without operating the main
switch. <Ref. to
CC(H4DOTC 2.5)-16,
DTC 11, 15, 21 AND 24
CRUISE CONTROL
COMMAND SWITCH,
Diagnostic Procedure with
Diagnostic Trouble Code
(DTC).>
22 Vehicle speed variation is
abnormal.Abnormality of vehicle speed variation is detected. <Ref. to CC(H4DOTC
2.5)-26, DTC 22 AND 32
VEHICLE SPEED SEN-
SOR, Diagnostic Proce-
dure with Diagnostic
Trouble Code (DTC).>
23 Engine-related sensor is
abnormal.Abnormality related to engine is detected. <Ref. to CC(H4DOTC
2.5)-2, Basic Diagnostic
Procedure.>
24 Cruise control-related
switch is abnormal.Abnormality of command switch is detected. (Open cir-
cuit is detected when continuing to be ON for an
extremely long time [approx. two minutes].)This DTC is indicated with
normal operation. <Ref. to
CC(H4DOTC 2.5)-16,
DTC 11, 15, 21 AND 24
CRUISE CONTROL
COMMAND SWITCH,
Diagnostic Procedure with
Diagnostic Trouble Code
(DTC).>
25 Brake switch input circuit
is abnormal.Abnormality of brake switch input circuit in ECM is
detected.<Ref. to CC(H4DOTC
2.5)-18, DTC 12 AND 25
STOP LIGHT SWITCH
AND BRAKE SWITCH,
Diagnostic Procedure with
Diagnostic Trouble Code
(DTC).>
26 Engine speed signal.  Abnormal increase of engine speed is detected.
 Gear is shifted to neutral, 1st or reverse position.Cruise with more than 2nd
shift position.
32 Out of vehicle speed range
of cruise control operation. Vehicle speed becomes under the control limit during
cruise driving.
 Set operation is conducted out of vehicle speed range
for setting
 RESUME operation is conducted without vehicle
speed memory.This DTC is also indicated
when increasing the
speed to the cruise set
available vehicle speed
and conducting the set
operation again. <Ref. to
CC(H4DOTC 2.5)-26,
DTC 22 AND 32 VEHICLE
SPEED SENSOR, Diag-
nostic Procedure with
Diagnostic Trouble Code
(DTC).>
33 Prohibition of WAIT after
acceleration operation.Vehicle speed becomes over the control limit during
cruise driving.This DTC is indicated
when running at the high
speed which is not suit-
able for cruise control. In
this case, conduct the
cruise set operation again
after decreasing the
speed to the cruise set
available vehicle speed. DTC Item Contents of diagnosis Reference

CC(H4DOTC 2.5)-15
CRUISE CONTROL SYSTEM (DIAGNOSTIC)
List of Diagnostic Trouble Code (DTC)
34 Prohibition when accelera-
tor pedal position is contin-
ued to be large.Vehicle is driven at the higher speed than set vehicle
speed for an extremely long time (approx. 10 minutes)
during cruise driving.This DTC is indicated
when running for a long
time at the higher speed
than cruise set available
vehicle speed by accelera-
tor operation. In this case,
release the cruise set.
35 Prohibition when vehicle
speed feedback is impos-
sible.During cruise driving, set vehicle speed cannot be main-
tained for some reasons such as sharp upslope, parking
brake and engine output abnormal decrease.This DTC is indicated
when the driving condi-
tion is not suitable for
cruise control. Conduct
the cruise set operation
again after clearing the
estimated reasons. DTC Item Contents of diagnosis Reference

CC(H4DOTC 2.5)-16
CRUISE CONTROL SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
8. Diagnostic Procedure with Diagnostic Trouble Code (DTC)
A: DTC 11, 15, 21 AND 24 CRUISE CONTROL COMMAND SWITCH
TROUBLE SYMPTOM:
 Cruise control cannot be set. (Cancelled immediately.)
 Cruise control cannot be released.
WIRING DIAGRAM:
CC-00256
F37B236
31264531245
B136
9
30 29 28 323120 19 18 22211012
1114
24
34 3327
261612345613
2315
25871735
B136M/B No.6
10113
B2361SET
SWITCH
CANCEL
SWITCHRESUME
SWITCH SBF-4F/B No.18
7
ECM BATTERY
HORN IGNITION
SWITCH
5
CRUISE CONTROL
MAIN SWITCH4
B161
2
3CRUISE CONTROL
COMMAND SWITCHF37HORN
RELAY
B161
12
3456

CC(H4DOTC 2.5)-17
CRUISE CONTROL SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step Check Yes No
1 CHECK CRUISE CONTROL MAIN SWITCH
CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the ECM harness connector.
3) Turn the ignition switch to ON.
4) Measure the voltage between harness con-
nector terminal and chassis ground when the
main switch is pressed and is not pressed.
Connector & terminal
(B136) No. 7 (+) — Chassis ground (
−):Is the voltage 0 V when the
main switch is not pressed? Is
the voltage more than 10 V
when the main switch is
pressed?Go to step 2. Check the fuse
No. 18 (in fuse &
relay box).
 Check the har-
ness for open or
short between
cruise control
command switch
and fuse & relay
box. If no malfunc-
tion is found after
checking above,
Go to step 6.
2 CHECK SET/COAST SWITCH CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the ECM harness connector.
3) Measure the voltage between harness con-
nector terminal and chassis ground when SET/
COAST switch is pressed and not pressed.
Connector & terminal
(B136) No. 11 (+) — Chassis ground (
−):Is the voltage 0 V when SET/
COAST switch is not pressed?
Is the voltage more than 10 V
when SET/COAST switch is
pressed?Go to step 3.Go to step 5.
3 CHECK RESUME/ACCEL SWITCH CIRCUIT.
Measure the voltage between harness connec-
tor terminal and chassis ground when
RESUME/ACCEL switch is pressed and not
pressed.
Connector & terminal
(B136) No. 10 (+) — Chassis ground (
−):Is the voltage 0 V when
RESUME/ACCEL switch is not
pressed? Is the voltage more
than 10 V when RESUME/
ACCEL switch is pressed?Go to step 4.Go to step 5.
4 CHECK CANCEL SWITCH CIRCUIT.
Measure the voltage between harness connec-
tor terminal and chassis ground when CAN-
CEL switch is pressed and not pressed.
Connector & terminal
(B136) No. 10 (+) — Chassis ground (
−):
(B136) No. 11 (+) — Chassis ground (
−): Is the voltage 0 V when CAN-
CEL switch is not pressed? Is
the voltage more than 10 V
when CANCEL switch is
pressed?Cruise control
command switch
circuit is OK.Go to step 5.
5 CHECK POWER SUPPLY FOR COMMAND
SWITCH.
Check the horn operation.Does the horn sound? Go to step 6. Check the fuse
No. 6 (in main fuse
box).
 Check the horn
relay. <Ref. to
COM-3, HORN
RELAY, INSPEC-
TION, Horn Sys-
tem.>
 Check the har-
ness for open or
short between
cruise control
command switch
and fuse & relay
box.
6 CHECK CRUISE CONTROL COMMAND
SWITCH.
Remove and check the cruise control com-
mand switch. <Ref. to CC-9, Cruise Control
Command Switch.>Is the cruise control command
switch OK?Check the harness
between cruise
control command
switch and ECM.Replace the cruise
control command
switch.

CC(H4DOTC 2.5)-18
CRUISE CONTROL SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
B: DTC 12 AND 25 STOP LIGHT SWITCH AND BRAKE SWITCH
TROUBLE SYMPTOM:
 Cruise control cannot be set.
 Cruise control cannot be released.
WIRING DIAGRAM:
CC-00257
B107B65
12
SBF-1SBF-2F/B No.16
2
1
B65
B1071
3
4
2
C8A1
C9
1234
STOP LIGHT
SWITCH CLUTCH
SWITCH
(MT MODEL)BATTERY
B134
A:
B136
C:ECM
B134
9
30 29 28 323120 19 18 222110 121114
24
34 3327 2617 16123456713
2315
258
B136
9
30 29 28 323120 19 18 22211012
1114
24
34 3327
261612345613
2315
25871735
C: A:
SBF-4F/B No.11
IGNITION
SWITCH
BRAKE
SWITCH STOP LIGHT SWITCH
AND BRAKE SWITCH
AT
:MT MODEL
:AT MODEL
AT
MT
MT
MT
AT