1999 SUBARU FORESTER fuse

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

6. DIAGNOSTICS ITEM 5
4F61 : CHECK FUSE.
Remove and visually check the fuse No. 6 (in main
fuse box).
:Is fuse No. 6 blown?
: Replace fuse (15 A).
: Go to step4F62.
4F62 : CHECK KEYLESS ENTRY CONTROL
MODULE.
1) Disconnect connector from keyless entry con-
trol module.
2) Insert the key to ignition switch (LOCK posi-
tion).
3) Measure voltage between keyless entry control
module connector (B176) and chassis ground.
Connector & terminal
(B176) No. 16 (+) Ð Chassis ground (þ):
B6M0963A
:Is the voltage more than 10 V?
: Replace keyless entry control module.

: Go to step4F63.4F63 : CHECK HARNESS CONNECTOR
BETWEEN BATTERY AND KEY
WARNING SWITCH.
1) Disconnect connector from key warning switch.
2) Measure voltage between key warning switch
connector (B74) and chassis ground.
Connector & terminal
(B74) No. 2 (+) Ð Chassis ground (þ):
B6M0964A
:Is the voltage more than 10 V?
: Go to step4F64.
: Repair wiring harness between battery
and key warning switch.
4F64 : CHECK HARNESS CONNECTOR
BETWEEN KEY WARNING SWITCH
AND KEYLESS ENTRY CONTROL
MODULE.
Measure resistance between key warning switch
connector (B74) and keyless entry control module
connector (B176).
Connector & terminal
(B74) No. 1 Ð (B176) No. 16:
B6M0965A
:Is the resistance less than 10W?
: Replace key warning switch.
: Repair wiring harness between key
warning switch and keyless entry control
module.
68
6-2[T4F6]DIAGNOSTICS
4. Keyless Entry System

5. Security System
A: PRECAUTION
1. SUPPLEMENTAL RESTRAINT SYSTEM
ªAIRBAGº
Airbag system wiring harness is routed near the
security 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 security con-
trol module.
B: PRE-INSPECTION
1. FUSE
5B11 : CHECK FUSE.
Remove and visually check the fuse No. 7 (in main
fuse box).
:Is fuse No. 7 blown?
: Replace fuse (20 A).
: Go to step5B12.
5B12 : 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 step5B21.
2. POWER SUPPLY CIRCUIT
5B21 : CHECK POWER SUPPLY CIRCUIT.
Measure voltage between main fuse box connec-
tor (F68) and chassis ground.
Connector & terminal
(F68) No. 4 (+) Ð Chassis ground (þ):
B6M1357A
:Is the voltage more than 10 V?
: Go to step5B22.
: Repair wiring harness between main
fuse box and battery.
5B22 : CHECK POWER SUPPLY CIRCUIT.
1) Disconnect connector from security control
module.
2) Measure voltage between security control mod-
ule connector (B93) and chassis ground.
Connector & terminal
(B93) No. 11 (+) Ð Chassis ground (þ):
B6M0967A
:Is the voltage more than 10 V?
: Go to step5B23.
: Repair wiring harness between security
control module and main fuse box.
69
[T5B2]6-2DIAGNOSTICS
5. Security System

5B23 : CHECK POWER SUPPLY CIRCUIT.
Measure voltage between main fuse box connec-
tor (F68) and chassis ground.
Connector & terminal
(F68) No. 2 (+) Ð Chassis ground (þ):
B6M1358A
:Is the voltage more than 10 V?
: Go to step5B24.
: Repair wiring harness between main
fuse box and battery.
5B24 : CHECK POWER SUPPLY CIRCUIT.
Measure voltage between security control module
connector (B93) and chassis ground.
Connector & terminal
(B93) No. 13 (+) Ð Chassis ground (þ):
B6M0968A
:Is the voltage more than 10 V?
: Go to step5B31.
: Repair wiring harness between security
control module and main fuse box.
3. GROUND CIRCUIT
5B31 : CHECK GROUND CIRCUIT.
Measure resistance between security control mod-
ule connector (B93) and chassis ground.
Connector & terminal
(B93) No. 14 (+) Ð Chassis ground:
B6M0969A
:Is the resistance less than 10W?
: Go to step5F11.
: Repair wiring harness between security
control module and chassis ground.
70
6-2[T5B2]DIAGNOSTICS
5. Security System

C: ELECTRICAL COMPONENTS LOCATION
S6M0454A
(1) Horn
(2) Keyless entry control module
(3) Security control module (under
console box)
(4) Security indicator light (in combi-
nation meter)(5) Horn relay (in main fuse box)
(6) Rear gate latch switch
(7) Interrupt relay (behind the fuse
box)
(8) Door switch(9) Passive arm connector (on driver
side front lower pillar)
71
[T5C0]6-2DIAGNOSTICS
5. Security System