2004 SUBARU FORESTER relay

CC(H4SO)-16
CRUISE CONTROL SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Symptom
Step Check Yes No
1 CHECK CRUISE CONTROL MAIN SWITCH
CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the cruise control main switch
harness connector.
3) Turn the ignition switch to ON.
4) Measure the voltage between harness con-
nector terminal and chassis ground.
Connector & terminal
With indicator built in combination
meter:
(B161) No. 3 (+) — Chassis ground (
−):
With indicator built in main switch:
(B161) No. 2 (+) — Chassis ground (
−):Is the voltage more than 10 V? Go to step 2. Check the fuse
No. 18 (in fuse &
relay box).
 Check the har-
ness for open or
short between
cruise control main
switch and fuse &
relay box.
2 CHECK CRUISE CONTROL MAIN SWITCH
CIRCUIT.
1) Turn the ignition switch OFF.
2) Disconnect the cruise control module har-
ness connector.
3) Measure the resistance between cruise
control module harness connector terminal
and cruise control main switch harness con-
nector terminal.
Connector & terminal
With indicator built in combination
meter:
(B94) No. 15 — (B161) No. 5:
With indicator built in main switch:
(B94) No. 15 — (B161) No. 1:Is the resistance less than 10
Ω?Go to step 3.Repair the har-
ness.
3 CHECK CRUISE CONTROL MAIN SWITCH.
Remove and check the cruise control main
switch. Switch.>Is the cruise control main
switch OK?Replace the cruise
control module.Replace the cruise
control main
switch.

CC(H4SO)-18
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) With indicator built in combination meter:
Disconnect the combination meter harness
connector.
With indicator built in main switch:
Disconnect the cruise control main switch har-
ness connector.
3) Turn the ignition switch to ON.
4) Measure the voltage between harness con-
nector terminal and chassis ground.
Connector & terminal
With indicator built in combination
meter:
(i10) No. 9 (+) — Chassis ground (
−):
With indicator built in main switch:
(B161) No. 3 (+) — Chassis ground (
−):Is the voltage more than 10 V? Go to step 2. Check the fuse
No. 13 (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 cruise control module har-
ness connector.
3) Measure the resistance between cruise
control module harness connector terminal
and combination meter harness connector ter-
minal.
Connector & terminal
With indicator built in combination
meter:
(B94) No. 1 (+) — (i10) No. 16:
With indicator built in main switch:
(B94) No. 1 (+) — (B161) No. 4:Is the resistance less than 10
Ω?Go to step 3.Repair the har-
ness.
3 CHECK CRUISE INDICATOR LIGHT CIR-
CUIT.
Ground the cruise control module harness
connector terminal with a suitable wire.
Connector & terminal
(B94) No. 1 — Chassis ground:Does the cruise indicator light
illuminate?Replace the cruise
control module. With indicator
built in combina-
tion meter: Check
the cruise indicator
light bulb in combi-
nation meter, and
replace it if mal-
function
occurred.No mal-
function found,
replace the printed
circuit of combina-
tion meter.
 With indicator
built in main
switch: Replace
the cruise control
main switch.

CC(H4SO)-19
CRUISE CONTROL SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Symptom
E: CHECK CRUISE CONTROL COMMAND SWITCH
TROUBLE SYMPTOM:
Cruise control cannot be set. (Cancelled immediately.)
WIRING DIAGRAM:
CC-00040
B94F45B236S1F144
12345678910
11 12 13 14 15 16 17 18 19 20
412365
4
321
BATTERY
CRUISE CONTROL MODULECRUISE CONTROL
COMMAND SWITCH
STEERING
ROLL CONNECTORHORN HORN RELAY HORN SWITCH
RESUME/
ACCEL
SWITCHCANCEL
SWITCHSET/
COAST
SWITCH M/B No.6
B94
F37
B62F45
S1
321
910
B236
13
3 2
11
3245123
8910411 12 13 14 15 16567
F144
F37
RHD
RHD
LHD
LHD
RHD :
:LHD
: LHD MODEL
: RHD MODEL
LHD
RHDRHD LHD
RHD :
:LHD

CC(H4SO)-20
CRUISE CONTROL SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Symptom
Step Check Yes No
1 CHECK SET/COAST SWITCH CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the cruise control module har-
ness connector.
3) Measure the voltage between harness con-
nector terminal and chassis ground when SET/
COAST switch is pressed and not pressed.
Connector & terminal
(B94) No. 10 (+) — Chassis ground (
−):Is the voltage 0 V when the
SET/COAST switch is not
pressed? Is the voltage more
than 10 V when the SET/
COAST switch is pressed?Go to step 2.Go to step 4.
2 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
(B94) No. 9 (+) — Chassis ground (
−):Is the voltage 0 V when the
RESUME/ACCEL switch is not
pressed? Is the voltage more
than 10 V when the RESUME/
ACCEL switch is pressed?Go to step 3.Go to step 4.
3 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
(B94) No. 9 (+) — Chassis ground (
−):
(B94) No. 10 (+) — Chassis ground (
−): Is the voltage 0 V when the
CANCEL switch is not
pressed? Is the voltage more
than 10 V when the CANCEL
switch is pressed?Cruise control
command switch
circuit is OK.Go to step 4.
4 CHECK POWER SUPPLY FOR COMMAND
SWITCH.
Check the horn operation.Does the horn sound? Go to step 5. Check the fuse
No. 6 (in main fuse
box).
 Check the horn
relay. COM-3, INSPEC-
TION, Horn Sys-
tem.>
 Check the har-
ness for open or
short between
cruise control
command switch
and fuse & relay
box.
5 CHECK CRUISE CONTROL COMMAND
SWITCH.
Remove and check the cruise control com-
mand switch. Command Switch.>Is the cruise control command
switch OK?Check the harness
between cruise
control command
switch and cruise
control module.Replace the cruise
control command
switch.

CC(H4SO)-22
CRUISE CONTROL SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Symptom
Step Check Yes No
1 CHECK STOP LIGHT SWITCH AND BRAKE
SWITCH CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the stop light switch and brake
switch harness connector.
3) Turn the ignition switch to ON.
4) Turn the cruise control main switch to ON.
5) Measure the voltage between harness con-
nector terminal and chassis ground.
Connector & terminal
(B65) No. 2 (+) — Chassis ground (
−): Is the voltage more than 10 V? Go to step 2. Check the fuse
No. 16 (in fuse &
relay box).
 Check the har-
ness for open or
short between
stop light/brake
switch and fuse &
relay box.
2 CHECK STOP LIGHT SWITCH AND BRAKE
SWITCH CIRCUIT.
Measure the voltage between harness connec-
tor terminal and chassis ground.
Connector & terminal
(B65) No. 4 (+) — Chassis ground (
−): Is the voltage more than 10 V? Go to step 3. Check the har-
ness for open or
short between
stop light/brake
switch and cruise
control module (AT
model).
 Check the clutch
switch and circuit
(MT model).
3 CHECK STOP LIGHT SWITCH AND BRAKE
SWITCH CIRCUIT.
1) Turn the cruise control main switch and
ignition switch to OFF.
2) Disconnect the cruise control module har-
ness connector.
3) Measure the resistance between cruise
control module harness connector terminal
and stop light switch and brake switch harness
connector terminal.
Connector & terminal
(B94) No. 20 — (B65) No. 3:
(B94) No. 16 — (B65) No. 1: Is the resistance less than 10
Ω?Go to step 4.Repair the har-
ness.
4 CHECK STOP LIGHT SWITCH AND BRAKE
SWITCH.
Remove and check the stop light switch and
brake switch. Switch.>Are the stop light switch and
brake switch are OK?Stop light switch
and brake switch
circuit are OK.Replace the stop
light switch and
brake switch.

CC(H4SO)-25
CRUISE CONTROL SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Symptom
H: CHECK INHIBITOR SWITCH (AT MODEL)
TROUBLE SYMPTOM:
Cruise control cannot be set.
WIRING DIAGRAM:
CC-00254
B94T7B12B323
12345678910
11 12 13 14 15 16 17 18 19 20123
4
56
78
9
1011 12
B94
B323
B12
T3
T7
B14
CRUISE
CONTROL
MODULE
INHIBITOR
SWITCH (AT MODEL)STARTER
MOTOR
4
1211
127
WS
WS
WS
OS
OS
123456789101112
:WITHOUT SECURITY SYSTEM
:WITH SECURITY SYSTEM
TO SECURITY
SYSTEM
3412
OS
BATTERY
SBF-1M/B No.2
SECURITY RELAY
2134

CC(H4SO)-27
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
21 Inner relay is seized. Cruise control module inner relay is seized when main
switch is OFF. DTC 21, 24, 25 AND 2A
CRUISE CONTROL
MODULE BUILT-IN
RELAY, CPU RAM, Diag-
nostic Procedure with
Diagnostic Trouble Code
(DTC).>
22 Vehicle speed sensor Vehicle speed signal changes more than 10 km/h (6
MPH) within 350 ms. DTC 22 VEHICLE SPEED
SENSOR, Diagnostic Pro-
cedure with Diagnostic
Trouble Code (DTC).>
24 Cruise control module is
abnormal.Two vehicle speed values stored in cruise control module
memory are not the same. DTC 21, 24, 25 AND 2A
CRUISE CONTROL
MODULE BUILT-IN
RELAY, CPU RAM, Diag-
nostic Procedure with
Diagnostic Trouble Code
(DTC).>
25 Cruise control module is
abnormal.Two output values stored in cruise control module mem-
ory are not the same. DTC 21, 24, 25 AND 2A
CRUISE CONTROL
MODULE BUILT-IN
RELAY, CPU RAM, Diag-
nostic Procedure with
Diagnostic Trouble Code
(DTC).>
28 Wiring harness opened. Open wiring harness circuit is detected via control mod-
ule relay when main switch is ON. DTC 28 WIRING HAR-
NESS OPENED., Diag-
nostic Procedure with
Diagnostic Trouble Code
(DTC).>
35 Motor drive system is
abnormal. Motor output circuit is open or shorted.
 Motor drive circuit is open or shorted. DTC 35 AND 36 ACTUA-
TOR MOTOR, Diagnostic
Procedure with Diagnos-
tic Trouble Code (DTC).>
36 Trouble of motor turning
speedMotor turning speed is low. DTC 35 AND 36 ACTUA-
TOR MOTOR, Diagnostic
Procedure with Diagnos-
tic Trouble Code (DTC).>
37 Motor clutch drive system
is abnormal. Motor clutch output circuit is open or shorted.
 Motor clutch drive circuit is open or shorted. DTC 37 ACTUATOR
MOTOR CLUTCH, Diag-
nostic Procedure with
Diagnostic Trouble Code
(DTC).>

CC(H4SO)-28
CRUISE CONTROL SYSTEM (DIAGNOSTIC)
List of Diagnostic Trouble Code (DTC)
38 Motor drive shaft does not
engage properly.Motor drive gear engagement is not properly adjusted. DTC 38 MOTOR DRIVE
SHAFT DOES NOT
ENGAGE PROPERLY.,
Diagnostic Procedure with
Diagnostic Trouble Code
(DTC).>
39 Motor is overloaded. Current flows through motor more frequently than under
normal conditions. DTC 39 MOTOR IS
OVERLOADED., Diag-
nostic Procedure with
Diagnostic Trouble Code
(DTC).>
2A Cruise control module is
abnormal.Cruise control module self-diagnosis function senses
abnormality. DTC 21, 24, 25 AND 2A
CRUISE CONTROL
MODULE BUILT-IN
RELAY, CPU RAM, Diag-
nostic Procedure with
Diagnostic Trouble Code
(DTC).> DTC Item Contents of diagnosis Reference