1999 SUBARU FORESTER Service Repair Manual

3H66 : PERFORM A CIRCUIT TEST IN HAR-
NESS BETWEEN ACTUATOR
(VACUUM VALVE, VENT 2 VALVE
AND VENT 1 VALVE) AND CRUISE
CONTROL MODULE.
Measure resistance of harness connector between
cruise control module, vacuum valve, vent 2 valve
and vent 1 valve.
Connector & terminal
(B7) No. 3 Ð (B94) No. 11:
S6M0132A
:Is resistance less than 10W?
: Go to step3H67.
: Repair or replace wiring harness
between actuator [W12B1].> and cruise control module
.3H67 : PERFORM A CIRCUIT TEST IN HAR-
NESS BETWEEN ACTUATOR
(VACUUM VALVE, VENT 2 VALVE
AND VENT 1 VALVE) AND CRUISE
CONTROL MODULE.
Measure resistance of harness connector between
cruise control module, vacuum valve, vent 2 valve
and vent 1 valve.
Connector & terminal
(B7) No. 4 Ð (B94) No. 2:
S6M0133A
:Is resistance less than 10W?
: Replace cruise control module.
: Repair or replace wiring harness
between actuator [W12B1].> and cruise control module
.
51
[T3H6]6-2DIAGNOSTICS
3. Cruise Control System

7. DIAGNOSTIC CODE 25 (CRUISE
CONTROL MODULE BUILT-IN RELAY,
CPU RAM)
DIAGNOSIS:
IPoor welding of built-in relay of cruise control
module.
IFailure of built-in CPU RAM of cruise control
module.
TROUBLE SYMPTOM:
ICruise control is canceled and memorized
cruise speed is also canceled.
IOnce cruise control is canceled, cruise control
cannot be set until the ignition switch and cruise
control main switch turns OFF, and then turns ON
again.
NOTE:
Check input/output signal and vehicle speed signal
with select monitor. When signals are in good
condition, failure is in cruise control module.
(Check power supply and ground conditions of
cruise control module.)
I: DIAGNOSTICS CHART WITH
SELECT MONITOR
1. FUNCTION MODE
NOTE:
Select monitor part No.:

Select the ªCruise Controlº system using the select
monitor and set the ªCurrent Data Display & Saveº
mode. The following parameters will then appear
on the display.
IVehicle Speed
The current vehicle speed is shown on the display.
IStop Light Switch
When the brake pedal is depressed, the stop light
switch shown on the display turns from ªOFFº to
ªONº.
IBrake Switch
When the brake pedal is depressed, the brake
switch shown on the display turns from ªOFFº to
ªONº.
IªSET/COASTº Switch
When the cruise control command switch is placed
in the ªSET/COASTº position, the SET/COAST
switch shown on the display turns from ªOFFº to
ªONº.
IªRESUME/ACCELº Switch
When the cruise control command switch is placed
in the ªRESUME/ACCELº position, the RESUME/
ACCEL switch shown on the display turns from
ªOFFº to ªONº.
IClutch/Inhibitor SwitchWhen the clutch pedal is depressed, the clutch/
inhibitor switch shown on the display turns from
ªONº to ªOFFº. (MT)
When the select lever is moved from the ªNº or ªPº
position to any other position, the clutch/inhibitor
switch shown on the display turns from ªONº to
ªOFFº.
52
6-2[T3H7]DIAGNOSTICS
3. Cruise Control System

4. Keyless Entry System
A: PRECAUTION
1. SUPPLEMENTAL RESTRAINT SYSTEM
ªAIRBAGº
Airbag system wiring harness is routed near the
keyless entry control module.
CAUTION:
IAll airbag system wiring harness and con-
nectors are yellow. Do not use electrical test
equipment on these circuits.
IBe careful not to damage airbag system wir-
ing harness when servicing the keyless entry
control module.
B: PRE-INSPECTION
1. POWER DOOR LOCK
4B11 : CHECK POWER DOOR LOCK.
Perform lock and unlock with door lock switch.
:Does the power door lock function
normally?
: Go to step4B21.
: Repair power door lock.
2. TRANSMITTER
4B21 : CHECK TRANSMITTER BATTERY.
1) Remove battery from transmitter.
NOTE:
To prevent static electricity damage to transmitter
printed circuit board, touch steel area of building
with hand to discharge static electricity carried on
body or clothes before disassembling transmitter.
B6M0950
2) Measure voltage battery.
NOTE:
IBattery discharge occurs during measurement.
Complete measurement within 5 seconds.
IDuring battery voltage measurement, voltage
falls more than 1.8 volts during 3 seconds period.
Weak battery is indicated. Replace battery.
S6M0291A
:Is the voltage more than 2 V?
: Go to step4B22.
: Replace transmitter battery. (Use
CR2032 or equivalent.)
53
[T4B2]6-2DIAGNOSTICS
4. Keyless Entry System

4B22 : CHECK LED OF TRANSMITTER.
1) Press either the LOCK/ARM or UNLOCK/
DISARM button six times to synchronize with the
keyless entry control module.
2) Press the LOCK/ARM button.
:Does the LED blink one time?
: Go to step4B23.
: Replace transmitter.
4B23 : CHECK LED OF TRANSMITTER.
Keep the LOCK/ARM button pressed.
:Does the LED blink one time and then
turn on?
: Go to step4B24.
: Replace transmitter.
4B24 : CHECK LED OF TRANSMITTER.
Press the UNLOCK/DISARM button.
:Does the LED blink one time?
: Go to step4B25.
: Replace transmitter.
4B25 : CHECK LED OF TRANSMITTER.
Keep the UNLOCK/DISARM button pressed.
:Does the LED blink two times?
: Go to step4B26.
: Replace transmitter.
4B26 : CHECK POWER DOOR LOCK
FUNCTION.
Perform lock and unlock function of power door
lock with transmitter.
:Does it function normally?
: Go to step4B27.
: Replace transmitter.4B27 : CHECK ON/OFF SELECT HORN
SIGNAL.
Press the LOCK/ARM or UNLOCK/DISARM but-
ton.
:Does the horn signal chirp?
: Go to step4B28.
: Keep both LOCK/ARM and UNLOCK/
DISARM buttons pressed for more than
1.5 seconds. Go to step4B28.
4B28 : CHECK ON/OFF SELECT HORN
SIGNAL.
Keep both LOCK/ARM and UNLOCK/DISARM
buttons pressed for more than 1.5 seconds.
:Does the horn signal chirp two
times?
: Go to step4B29.
: Replace transmitter.
4B29 : CHECK ON/OFF SELECT HORN
SIGNAL.
Press LOCK/ARM or UNLOCK/DISARM button.
:Does the horn signal chirp?
: Replace transmitter.
: Go to step4B210.
4B210 : CHECK ON/OFF SELECT HORN
SIGNAL.
Keep both LOCK/ARM and UNLOCK/DISARM
buttons pressed for more than 1.5 seconds.
:Does the horn signal chirp one time?
: Go to step4B211.
: Replace transmitter.
4B211 : CHECK ON/OFF SELECT HORN
SIGNAL.
Press LOCK/ARM and UNLOCK/DISARM button.
:Does the horn signal chirp?
: Go to step4B212.
: Replace transmitter.
54
6-2[T4B2]DIAGNOSTICS
4. Keyless Entry System

4B212 : CHECK FOR UNCHECKED TRANS-
MITTER.
Check for an unchecked transmitter.
:Does an unchecked transmitter
exist?
: Check for an unchecked transmitter. Go
to step4B21.
: Go to step4B31.
3. FUSE
4B31 : CHECK FUSE.
Remove and visually check the fuse No. 3 (in fuse
box).
:Is fuse No. 3 blown?
: Replace fuse (15 A).
: Go to step4B41.
55
[T4B3]6-2DIAGNOSTICS
4. Keyless Entry System

4. POWER SUPPLY CIRCUIT
4B41 : CHECK POWER SUPPLY CIRCUIT.
Measure voltage between fuse box connector
(B158) and chassis ground.
Connector & terminal
(B158) No. 8 (+) Ð Chassis ground (þ):
B6M1344B
:Is the voltage more than 10 V?
: Go to step4B42.
: Repair wiring harness between fuse box
and battery.
4B42 : CHECK POWER SUPPLY CIRCUIT.
1) Disconnect connector from keyless entry con-
trol module.
2) Measure voltage between keyless entry control
module connector (B176) and chassis ground.
Connector & terminal
(B176) No. 3 (+) Ð Chassis ground (þ):
B6M0952A
:Is the voltage more than 10 V?
: Go to step4B51.
: Repair wiring harness between keyless
entry control module and fuse box.
5. GROUND CIRCUIT
4B51 : CHECK GROUND CIRCUIT.
Measure resistance between keyless entry control
module connector (B176) and chassis ground.
Connector & terminal
(B176) No. 8 (+) Ð Chassis ground (þ):
B6M0953A
:Is the resistance less than 10W?
: Go to step4F11.
: Repair wiring harness between keyless
entry control module and chassis
ground.
56
6-2[T4B4]DIAGNOSTICS
4. Keyless Entry System

C: ELECTRICAL COMPONENTS LOCATION
S6M0450A
(1) Horn
(2) Keyless entry control module(3) Horn relay (in main fuse box)
(4) Rear gate latch switch(5) Door switch
57
[T4C0]6-2DIAGNOSTICS
4. Keyless Entry System

D: SCHEMATIC
S6M0451
58
6-2[T4D0]DIAGNOSTICS
4. Keyless Entry System