1999 SUBARU FORESTER Service Repair Manual

S6M0452
59
[T4D0]6-2DIAGNOSTICS
4. Keyless Entry System

E: CONTROL MODULE I/O SIGNAL
B6M0957
Content Terminal No. Measuring condition
Door and rear gate lock actuator
(Except driver side)1 (OUTPUT)Battery voltage is present when pressing the transmitter UNLOCK/
DISARM button two times.
Door and rear gate lock actuator 2 (OUTPUT)Battery voltage is present when pressing the transmitter LOCK/ARM
button one time.
Power supply (Back-up) 3 Battery voltage is constantly present.
IRoom light
IRear gate latch switch4 (OUTPUT)I0 V is present when pressing the transmitter UNLOCK/DISARM
button one time.
IBattery voltage is present when opening the rear gate.
Door lock switch 5 (INPUT) 0 V is present when operating the door lock switch.
Door switch 7 (INPUT) Battery voltage is present when any door is open.
Ground 8 Ð
Door lock actuator (Driver side) 9 (OUTPUT)Battery voltage is present when pressing the transmitter UNLOCK/
DISARM button one time.
Security control module 10 Ð
Security control module 11 Ð
Horn relay 12 (OUTPUT)0 V is present when pressing the transmitter UNLOCK/DISARM or
LOCK/ARM button.
Security control module 13 Ð
Ignition switch (ON) 14 (INPUT) Battery voltage is present when ignition switch is turned ON.
Door unlock switch 15 (INPUT) 0 V is present when operating the door lock switch.
Key warning switch 16 (INPUT)Battery voltage is present when inserting the key into the ignition
switch.
F: DIAGNOSTICS PROCEDURE
1. BASIC DIAGNOSTICS PROCEDURE
4F11 : CHECK KEYLESS ENTRY FUNC-
TION.
1) Perform pre-inspection.

2) Remove ignition key from ignition switch.
3) Set the room light switch in the middle position.
4) Close all doors and the rear gate.
5) Press the LOCK/ARM button one time.
:Do all doors and rear gate lock nor-
mally?
: Go to step4F12.
: Replace keyless entry control module.
4F12 : CHECK KEYLESS ENTRY FUNC-
TION.
Check if the horn signal chirps.
:Does the horn chirp one time?
: Go to step4F13.
: Go to step4F21.
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4. Keyless Entry System

4F13 : CHECK KEYLESS ENTRY FUNC-
TION.
Press the UNLOCK/DISARM button one time.
:Does the driver's door unlock nor-
mally?
: Go to step4F14.
: Replace keyless entry control module.

4F14 : CHECK KEYLESS ENTRY FUNC-
TION.
Check if the horn signal chirps.
:Does the horn chirp two times?
: Go to step4F15.
: Replace keyless entry control module.

4F15 : CHECK KEYLESS ENTRY FUNC-
TION.
Check if the room light is turned on.
:Does the room light turn on for 30
seconds, and then turn off?
: Go to step4F16.
: Go to step4F31.
4F16 : CHECK KEYLESS ENTRY FUNC-
TION.
1) Press the LOCK/ARM button one time.
2) Press the UNLOCK/DISARM button two times.
:Do all doors and rear gate unlock
normally?
: Go to step4F17.
: Replace keyless entry control module.

4F17 : CHECK KEYLESS ENTRY FUNC-
TION.
Keep the LOCK/ARM button pressed for more than
1.5 seconds.
:Does the horn sound for 30 seconds,
and then turns off?
: Go to step4F18.
: Replace keyless entry control module.
4F18 : CHECK KEYLESS ENTRY FUNC-
TION.
1) Keep the LOCK/ARM button pressed for more
than 1.5 seconds.
2) Horn will sound, and then press the LOCK/ARM
button.
:Does the horn turn off?
: Go to step4F19.
: Replace keyless entry control module.

4F19 : CHECK KEYLESS ENTRY FUNC-
TION.
1) Keep the LOCK/ARM button pressed for more
than 1.5 seconds.
2) Horn will sound, and then press the UNLOCK/
DISARM button.
:Does the horn turn off?
: Go to step4F110.
: Replace keyless entry control module.

4F110 : CHECK DOOR SWITCH FUNCTION.
Open the front left door.
:Does the room light turn on?
: Go to step4 F 111.
: Go to step4F41.
4F111 : CHECK DOOR SWITCH FUNCTION.
1) Close the front left door.
2) Open the front right door.
:Does the room light turn on?
: Go to step4F112.
: Go to step4F41.
4F112 : CHECK DOOR SWITCH FUNCTION.
1) Close the front right door.
2) Open the rear left door.
:Does the room light turn on?
: Go to step4F113.
: Go to step4F41.
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[T4F1]6-2DIAGNOSTICS
4. Keyless Entry System

4F113 : CHECK DOOR SWITCH FUNCTION.
1) Close the rear left door.
2) Open the rear right door.
:Does the room light turn on?
: Go to step4F114.
: Go to step4F41.
4F114 : PERFORM PROGRAMMING.
NOTE:
Finish operation from step 1) through 4) within 45
seconds.
1) Sit on the driver's seat and close all doors and
the rear gate.
2) Open the driver's door.
3) Close the driver's door.
4) Turn the ignition switch from ON to LOCK ten
times in rapid succession (within 15 seconds).
NOTE:
Do not start the engine at this time.
5) The horn chirps one time to indicate that the
system has been in the programming mode.
6) Open the driver's door.
7) Close the driver's door.
8) Press any button on the transmitter that you
wish to program into the system.
9) Horn will chirp two times to indicate that the
transmitter has been programmed.
NOTE:
Any additional transmitter can also be pro-
grammed at this time. Repeat steps 6) through 9)
for an additional transmitter.
10) Remove the ignition key from the ignition
switch.
11) The horn will chirp three times to indicate that
the system has exited the programming mode.
12) Check the keyless entry system properly oper-
ates by operating each transmitter.
:Does the transmitter operate nor-
mally?
: Go to step4F115.
: Go to step4F51.4F115 : CHECK IGNITION KEY SWITCH.
1) Insert the ignition key to the ignition switch (at
LOCK position).
2) Perform lock and unlock with transmitter.
:Does the power door lock function
normally?
: Go to step4F61.
: End of basic diagnostics procedure.
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6-2[T4F1]DIAGNOSTICS
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.
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[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.
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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.
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[T4F3]6-2DIAGNOSTICS
4. Keyless Entry System

4F34 : CHECK POWER SUPPLY FOR
ROOM LIGHT.
1) Disconnect connector from room light.
2) Open any door.
3) Measure voltage between room light connector
(R52) and chassis ground.
Connector & terminal
(R52) No. 2 (+) Ð Chassis ground (þ):
B6M0961A
:Is the voltage more than 10 V?
: Go to step4F35.
: Repair wiring harness between room
light and battery.4F35 : CHECK HARNESS CONNECTOR
BETWEEN ROOM LIGHT AND KEY-
LESS ENTRY CONTROL MODULE.
1) Disconnect connector from keyless entry con-
trol module.
2) Measure resistance between room light con-
nector (R52) and keyless entry control module
connector (B176).
Connector & terminal
(R52) No. 1 Ð (B176) No.4:
B6M0962A
:Is the resistance less than 10W?
: Replace keyless entry control module.

: Repair wiring harness between room
light and keyless entry control module.
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6-2[T4F3]DIAGNOSTICS
4. Keyless Entry System