1999 SUBARU FORESTER Service Repair Manual

3H31 : CHECK CLUTCH SWITCH. (MT)
1) Turn ignition switch to ON.
2) Turn cruise control main switch to ON.
3) Apply parking brake securely.
4) Set select monitor in ªCurrent Data Display &
Saveº mode.
5) Depress the clutch pedal and check signal for
proper operation. (MT)
The Clutch/Inhibitor Switch shown on the display
turns from ªONº to ªOFFº.
6) Disconnect connector of clutch switch.
7) Check continuity of the clutch switch.
Terminals
No. 1 Ð No. 2:
G6M0184
:Is resistance less than 10W? (When
clutch pedal is released.)
: Go to step3H32.
: Replace clutch switch. [C100].>3H32 : CHECK CLUTCH SWITCH. (MT)
Check continuity of the clutch switch.
Terminals
No. 1 Ð No. 2:
G6M0184
:Is resistance more than 1 MW? (When
clutch pedal is depressed.)
: Replace cruise control module. 6-2 [W12B4].>
: Replace clutch switch. [C100].>
35
[T3H3]6-2DIAGNOSTICS
3. Cruise Control System

3H33 : CHECK INHIBITOR SWITCH. (AT)
1) Turn ignition switch to ON.
2) Turn cruise control main switch to ON.
3) Apply parking brake securely.
4) Set select monitor in ªCurrent Data Display &
Saveº mode.
5) Set the select lever from P or N position to D
position and check signal for proper operation.
The Clutch/Inhibitor Switch shown on the display
turns from ªONº to ªOFFº.
6) Set the select lever to P or N position.
7) Disconnect connector of inhibitor switch.
8) Check continuity of the inhibitor switch.
Terminals
No. 7 Ð No. 12:
B6M1426
:Is resistance less than 10W? (When
select lever is in P or N.)
: Go to step3H34.
: Replace inhibitor switch. [W200].> Repair inhibitor switch wiring
harness.3H34 : CHECK INHIBITOR SWITCH. (AT)
Check continuity of the inhibitor switch.
Terminals
No. 7 Ð No. 12:
B6M1426
:Is resistance more than 1 MW? (When
select lever is not in P or N.)
: Replace cruise control module. 6-2 [W12B4].>
: Replace inhibitor switch. [W200].> Repair inhibitor switch wiring
harness.
36
6-2[T3H3]DIAGNOSTICS
3. Cruise Control System

MEMO:
37
[T3H3]6-2DIAGNOSTICS
3. Cruise Control System

4. DIAGNOSTIC CODE 13 AND 24 (SPEED SENSOR SYSTEM)
DIAGNOSIS:
IDisconnection or short circuit of vehicle speed sensor (MT model) or transmission control module (AT
model).
TROUBLE SYMPTOM:
ICruise control cannot be set. (Cancelled immediately.)
WIRING DIAGRAM:
S6M0421
38
6-2[T3H4]DIAGNOSTICS
3. Cruise Control System

3H41 : CHECK TRANSMISSION TYPE.
:Is the transmission type MT?
: Go to step3H42.
: Go to step3H46.
3H42 : CHECK HARNESS CONNECTOR
BETWEEN CRUISE CONTROL MOD-
ULE AND VEHICLE SPEED SEN-
SOR.
1) Disconnect connector from vehicle speed sen-
sor and cruise control module.
2) Measure resistance of harness connector
between vehicle speed sensor and cruise control
module.
Connector & terminal
(B17) No. 1 Ð (B94) No. 18:
S6M0327A
:Is the resistance less than 10W?
: Go to step3H43.
: Repair wiring harness.3H43 : CHECK HARNESS CONNECTOR
BETWEEN BATTERY AND VEHICLE
SPEED SENSOR.
1) Turn ignition switch to ON.
2) Measure voltage between vehicle speed sensor
connector (B17) and chassis ground.
Connector & terminal
(B17) No. 3 (+) Ð Chassis ground (þ):
B6M0945A
:Is the voltage more than 10 V?
: Go to step3H44.
: Repair harness connector between bat-
tery and vehicle speed sensor.
3H44 : CHECK HARNESS CONNECTOR
BETWEEN VEHICLE SPEED SEN-
SOR AND ENGINE GROUND.
1) Turn ignition switch to OFF.
2) Measure resistance between vehicle speed
sensor connector (B17) and engine ground.
Connector & terminal
(B17) No. 2 (+) Ð Engine ground (þ):
B6M0946A
:Is the resistance less than 10W?
: Go to step3H45.
: Repair harness connector between
vehicle speed sensor and engine
ground.
39
[T3H4]6-2DIAGNOSTICS
3. Cruise Control System

3H45 : CHECK VEHICLE SPEED SENSOR.
1) Connect connector to vehicle speed sensor.
2) Set the vehicle on free roller, or lift-up the
vehicle and support with safety stands.
WARNING:
Be careful not to be caught up by the running
wheels.
3) Set oscilloscope to vehicle speed sensor con-
nector terminals.
Positive probe; (B17) No. 1
Earth lead; (B17) No. 2
H6M0789A
4) Drive the vehicle at speed greater than 20 km/h
(12 MPH).
5) Measure signal voltage indicated on oscillo-
scope.
H6M0790A
:Is the voltage more than 5 V?
: Replace cruise control module. 6-2 [W12B4].>
: Replace vehicle speed sensor. 6-2 [W1400].>3H46 : CHECK HARNESS CONNECTOR
BETWEEN CRUISE CONTROL MOD-
ULE AND AUTOMATIC TRANSMIS-
SION CONTROL MODULE.
1) Disconnect connector from automatic transmis-
sion control module and cruise control module.
2) Measure resistance between cruise control
module connector and automatic transmission
control module connector.
CAUTION:
To measure the voltage and/or resistance, use
a tapered pin with a diameter of less than 0.64
mm (0.025 in). Do not insert the pin more than
5 mm (0.20 in).
Connector & terminal
(B94) No. 18 Ð (B56) No. 17:
S6M0341A
:Is the resistance less than 10W?
: Go to step3H47.
: Repair harness connector between
cruise control module and automatic
transmission control module.
40
6-2[T3H4]DIAGNOSTICS
3. Cruise Control System

3H47 : CHECK AUTOMATIC TRANSMIS-
SION CONTROL MODULE.
1) Connect connector to automatic transmission
control module.
2) Set the vehicle on free roller, or lift-up the
vehicle and support with safety stands.
WARNING:
Be careful not to be caught by the running
wheels.
3) Drive the vehicle faster than 10 km/h (6 MPH).
4) Measure voltage between automatic transmis-
sion control module connector (B56) and chassis
ground.
CAUTION:
To measure the voltage and/or resistance, use
a tapered pin with a diameter of less than 0.64
mm (0.025 in). Do not insert the pin more than
5 mm (0.20 in).
Connector & terminal
(B56) No. 17 (+) Ð Chassis ground (þ):
S6M0342A
:Is the voltage less than 1 V¨more
than 4 V?
: Replace cruise control module. 6-2 [W12B4].>
: Replace automatic transmission control
module.
41
[T3H4]6-2DIAGNOSTICS
3. Cruise Control System

5. DIAGNOSTIC CODE 14 (SET/COAST SWITCH, RESUME/ACCEL SWITCH, CANCEL
SWITCH)
DIAGNOSIS:
IShort circuit inside the SET SW and RESUME SW.
TROUBLE SYMPTOM:
ICruise control cannot be set. (Cancelled immediately.)
WIRING DIAGRAM:
S6M0123
42
6-2[T3H5]DIAGNOSTICS
3. Cruise Control System