fuse SUBARU FORESTER 1999 Service User Guide

3B48 : CHECK CABLE MOVEMENT.
Connect + (positive) battery cable to terminal No.
2 and þ (negative) battery cable to terminals No. 1
and 4 of actuator connector.
S6M0220
:Does cruise control perform hold
operation?
: Go to step3B49.
: Replace actuator. [W12B1].> Go to step3B49.
3B49 : CHECK CABLE MOVEMENT.
Connect + (positive) battery cable to terminal No.
2 and þ (negative) battery cable to terminal No. 4
of actuator connector.
S6M0220
:Does cruise control perform release
operation?
: Go to step3B51.
: Replace actuator. [W12B1].> Go to step3B51.
5. POWER SUPPLY
3B51 : CHECK BATTERY.
Measure battery specific gravity of electrolyte.
:Is battery specific gravity more than
1.250?
: Go to step3B52.
: Charge or replace battery. [W2A0].> Go to step3B52.
3B52 : CHECK FUSES, CONNECTORS AND
HARNESSES.
Check the condition of the main and other fuses,
and harnesses and connectors. Also check for
proper grounding.
:Is there anything unusual about the
appearance of main fuse, fuse,
harness, connector and grounding?
: Repair or replace faulty parts. End of
pre-inspection.
: End of pre-inspection.
17
[T3B5]6-2DIAGNOSTICS
3. Cruise Control System

2. ON-BOARD DIAGNOSIS WITH SELECT
MONITOR
IGeneral
The on-board diagnosis function of the cruise con-
trol system uses an external select monitor.
The on-board diagnosis function operates in two
categories, which are used depending on the type
of problems;
NOTE:
Select monitor part No.:

1) Cruise cancel conditions diagnosis
(1) This category of diagnosis requires actual
vehicle driving in order to determine the cause,
(as when cruise speed is cancelled during driv-
ing although cruise cancel condition is not
entered).
(2) Cruise control module memory stores the
cancel condition (Code No.) which occurred
during driving. When there are plural cancel
conditions (Code No.), they are shown on the
select monitor.
CAUTION:
IThe cruise control memory stores not only
the cruise ªcancelº which occurred (although
ªcancelº operation is not entered by the
driver), but also the ªcancelº condition input by
the driver.
IThe content of memory is cleared when igni-
tion switch or cruise main switch is turned OFF.
2) Real-time diagnosis
The real-time diagnosis function is used to deter-
mine whether or not the input signal system is in
good order, according to signal emitted from
switches, sensors, etc.
(1) Vehicle cannot be driven at cruise speed
because problems occurs in the cruise control
system or its associated circuits.
(2) Monitor the signal conditions from switches
and sensors.
ICruise Cancel Conditions Diagnosis
1) Connect select monitor.
2) Start the engine and turn cruise control main
switch to ON.
3) Set select monitor in ªAll System Diagnosisº
mode.
NOTE:
The diagnostic code is also shown in the ªEach
System Checkº mode. This mode is called up on
the ªCruise Control Diagnosisº screen by selecting
the item ªCancel Code(s) Displayº.
4) Drive vehicle at least 40 km/h (25 MPH) with
cruise speed set.5) If cruise speed is canceled itself (without doing
any cancel operations), a diagnostic code will
appear on select monitor display.
CAUTION:
IA diagnostic code will also appear when
cruise cancel is effected by driver. Do not con-
fuse.
IHave a co-worker ride in vehicle to assist in
diagnosis during driving.
NOTE:
Diagnostic code will be cleared by turning ignition
switch or cruise control main switch to OFF.
IReal-Time Diagnosis
1) Connect select monitor.
2) Turn ignition switch and cruise control main
switch to ON.
3) Select the ªCurrent Data Display & Saveº mode
on the select monitor ªCruise Control Diagnosisº
screen.
4) Ensure that normal indication is displayed when
controls are operated as indicated below:
IDepress/release the brake pedal. (Stop light
switch and brake switch turn ON.)
ITurn ON the ªSET/COASTº switch.
ITurn ON the ªRESUME/ACCELº switch.
IDepress/release the clutch pedal. (MT)
ISet the select lever to P or N. (AT)
23
[T3F2]6-2DIAGNOSTICS
3. Cruise Control System

3G31 : CHECK FUSE.
Check fuse No. 18.
S6M0110A
:Is fuse No. 18 blown?
: Replace fuse No. 18. Go to step3G32.
: Go to step3G32.
3G32 : CHECK POWER SUPPLY.
1) Turn ignition switch to ON.
2) Measure voltage between fuse & relay box con-
nector and chassis ground.
Connector & terminal
(B152) No. 5 (+) Ð Chassis ground (þ):
:Is voltage more than 10 V?
: Go to step3G33.
: Replace fuse No. 18. When fuse No. 18
is blown again, repair shorted parts of
circuit.3G33 : CHECK CRUISE CONTROL MAIN
SWITCH.
1) Turn ignition switch to OFF.
2) Remove cruise control main switch and discon-
nect connector.
3) Turn ignition switch to ON.
4) Measure voltage between cruise control main
switch connector and chassis ground.
Connector & terminal
(B161) No. 3 (+) Ð Chassis ground (þ):
B6M0183C
:Is voltage more than 10 V?
: Go to step3G34.
: Replace cruise control main switch.

3G34 : CHECK CRUISE CONTROL MAIN
SWITCH.
Measure resistance between cruise control main
switch terminals.
Terminals
No. 3 Ð No. 5:
G6M0244
:Is resistance less than 10W? (When
switch is ON.)
: Go to step3G35.
: Replace cruise control main switch.

27
[T3G3]6-2DIAGNOSTICS
3. Cruise Control System

3H51 : CHECK POWER SUPPLY.
1) Turn ignition switch to ON.
2) Turn cruise control main switch to ON.
3) Set select monitor in ªCurrent Data Display &
Saveº mode.
4) Check signals for proper operation.
(1) When pushing the SET/COAST switch:
The SET/COAST switch shown on the display
turns from ªOFFº to ªONº.
(2) When pushing the RESUME/ACCEL
switch:
The RESUME/ACCEL switch shown on the dis-
play turns from ªOFFº to ªONº.
5) Turn ignition switch to OFF.
6) Disconnect connector from cruise control com-
mand switch.
7) Turn ignition switch to ON.
8) Measure voltage between cruise control com-
mand switch connector and chassis ground.
Terminals
No. 1 (+) Ð Chassis ground (þ):
S6M0124
:Is voltage more than 10 V?
: Go to step3H52.
: Repair or replace wiring harness
between fuse & relay box and cruise
control command switch. [W12B3].>3H52 : CHECK CRUISE CONTROL COM-
MAND SWITCH.
1) Turn ignition switch to OFF.
2) Connect connector of cruise control command
switch.
3) Turn ignition switch to ON.
4) Measure voltage between cruise control com-
mand switch connector and chassis ground.
Terminals
No. 2 (+) Ð Chassis ground (þ):
S6M0124
:Is voltage more than 10 V? (When
SET/COAST switch is ON.)
: Go to step3H53.
: Replace cruise control command
switch.
3H53 : CHECK CRUISE CONTROL COM-
MAND SWITCH.
Measure voltage between cruise control command
switch connector and chassis ground.
Terminals
No. 3 (+) Ð Chassis ground (þ):
S6M0124
:Is voltage more than 10 V? (When
RESUME/ACCEL switch is ON.)
: Go to step3H54.
: Replace cruise control command
switch.
43
[T3H5]6-2DIAGNOSTICS
3. Cruise Control 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

2. DIAGNOSTICS ITEM 1
4F21 : SELECT HORN SIGNAL OPERA-
TION.
Keep both LOCK/ARM and UNLOCK/DISARM
buttons pressed for more than 1.5 seconds.
:Does the horn chirp one time?
: Go to step4F22.
: Replace keyless entry control module.

4F22 : CHECK HORN SIGNAL OUTPUT
SIGNAL.
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. 12 (+) Ð Chassis ground (þ):
B6M0958A
:Is the voltage more than 10 V?
: Go to step4F23.
: Go to step4F26.4F23 : CHECK HORN RELAY.
1) Remove horn relay from main fuse box.
2) Check continuity between horn relay terminals.
Terminals
No. 1 Ð No. 2:
B6M1348B
:Does continuity exist?
: Replace horn relay.
: Go to step4F24.
4F24 : CHECK HORN RELAY.
Check continuity between horn relay terminals.
Terminals
No. 3 Ð No. 4:
B6M1349B
:Does continuity exist?
: Go to step4F25.
: Replace horn relay.
63
[T4F2]6-2DIAGNOSTICS
4. Keyless Entry System

4F25 : CHECK HORN RELAY.
1) Connect the battery to horn relay terminals No.
3 and No. 4.
2) Check continuity between horn relay terminals.
Terminals
No. 1 Ð No. 2:
B6M1350B
:Does continuity exist?
: Repair wiring harness of horn circuit.
: Replace horn relay.
4F26 : CHECK FUSE.
Remove and visually check the fuse No. 6 (in main
fuse box).
:Is the fuse No. 6 blown?
: Replace fuse (15 A).
: Go to step4F27.4F27 : CHECK POWER SUPPLY FOR
HORN RELAY.
1) Install horn relay to main fuse box.
2) Measure voltage between main fuse box con-
nector (F37) and chassis ground.
Connector & terminal
(F37) No. 4 (+) Ð Chassis ground (þ):
B6M1351A
:Is the voltage more than 10 V?
: Go to step4F28.
: Repair wiring harness between main
fuse box and battery.
64
6-2[T4F2]DIAGNOSTICS
4. Keyless Entry System

4F28 : CHECK RESISTANCE BETWEEN
HORN RELAY AND KEYLESS
ENTRY CONTROL MODULE.
1) Disconnect connector from main fuse box and
keyless entry control module.
2) Measure resistance between keyless entry con-
trol module connector (B176) and main fuse box
connector (F37).
Connector & terminal
(B176) No. 12 Ð (F37) No. 4:
B6M1352A
:Is the resistance less than 10W?
: Replace keyless entry control module.

: Repair wiring harness between main
fuse box and keyless entry control mod-
ule.
3. DIAGNOSTICS ITEM 2
4F31 : CHECK FUSE.
Remove and visually check the fuse No. 2 (in main
fuse box).
:Is fuse No. 2 blown?
: Replace fuse (15 A).
: Go to step4F32.
4F32 : CHECK ROOM LIGHT BULB.
Remove and visually check the room light bulb.
:Is the bulb blown?
: Replace bulb.
: Go to step4F33.
4F33 : CHECK ROOM LIGHT SWITCH.
1) Remove room light.
2) Measure resistance of room light switch termi-
nal at the middle position.
Terminals
No. 2 Ð No. 3:
B6M0960A
:Is the resistance less than 1W?
: Repair or replace room light.
: Go to step4F34.
65
[T4F3]6-2DIAGNOSTICS
4. Keyless Entry System