SUBARU FORESTER 2004 Service Repair Manual

SL-11
SECURITY AND LOCK
Door Lock Control System
4. CHECK DOOR LOCK SWITCH AND CIRCUIT
Step Check Yes No
1 CHECK DOOR LOCK SWITCH CIRCUIT.
1) Disconnect the keyless entry control mod-
ule or double lock module harness connector.
2) Measure the resistance between the har-
ness connector terminal and chassis ground
when moving the door lock switch to LOCK.
Connector & terminal
Without double lock:
(B176) No. 10 — Chassis ground:
With double lock:
(B325) No. 7 — Chassis ground:Is the resistance less than 10
Ω?Go to step 2.Go to step 3.
2 CHECK DOOR LOCK SWITCH CIRCUIT.
Measure the resistance between the harness
connector terminal and chassis ground when
the door lock switch is moved to UNLOCK.
Connector & terminal
Without double lock:
(B176) No. 8 — Chassis ground:
With double lock:
(B325) No. 4 — Chassis ground:Is the resistance less than 10
Ω?The door lock
switch is OK.Go to step 3.
3 CHECK DOOR LOCK SWITCH.
1) Disconnect the door lock switch harness
connector.
2) Measure the resistance between the door
lock switch terminals when moving the door
lock switch to LOCK.
Connector & terminal
LHD model:
(D7) No. 5 — No. 9
RHD model:
(D7) No. 15 — Switch ground:Is the resistance less than 1
Ω?Go to step 4.Replace the door
lock switch.
4 CHECK DOOR LOCK SWITCH.
Measure the resistance between the door lock
switch terminals when moving the door lock
switch to UNLOCK.
Connector & terminal
LHD model:
(D7) No. 5 — No. 8
RHD model:
(D7) No. 16 — Switch ground:Is the resistance less than 1
Ω?Check the harness
for open circuits or
shorts between
the keyless entry
control module or
double lock mod-
ule and the door
lock switch.Replace the door
lock switch.

SL-12
SECURITY AND LOCK
Door Lock Control System
5. CHECK DOOR LOCK ACTUATOR AND CIRCUIT
6. CHECK KEY CYLINDER LOCK SWITCH AND CIRCUIT
Step Check Yes No
1 CHECK OUTPUT SIGNAL.
Measure the voltage between the harness con-
nector terminal of keyless entry control module
or double lock module and chassis ground
when moving the door lock switch to LOCK.
Connector & terminal
Without double lock:
(B176) No. 18 (+) — Chassis ground (
−):
With double lock:
(B324) No. 3 (+) — Chassis ground (
−):Is the voltage more than 10 V? Go to step 2.Replace the key-
less entry control
module or double
lock module.
2 CHECK OUTPUT SIGNAL.
Measure the voltage between the harness con-
nector terminal of keyless entry control module
or double lock module and chassis ground
when moving the door lock switch to UNLOCK.
Connector & terminal
Without double lock:
(B176) No. 17 (+) — Chassis ground (
−):
With double lock:
(B324) No. 5 (+) — Chassis ground (
−):Is the voltage more than 10 V? Go to step 3.Replace the key-
less entry control
module or double
lock module.
3 CHECK DOOR LOCK ACTUATOR.
Check the door lock actuator.
Front door lock actuator: <Ref. to SL-25, Front
Door Lock Actuator.>
Rear door lock actuator: <Ref. to SL-29, Rear
Door Lock Actuator.>
Rear gate latch lock actuator: <Ref. to SL-32,
Rear Gate Latch Lock Actuator.>Is the door lock actuator OK? Check the harness
for open circuits or
shorts between
the keyless entry
control module or
double lock mod-
ule and the door
lock actuator.Replace the door
lock actuator.
Step Check Yes No
1 CHECK KEY CYLINDER LOCK SWITCH CIR-
CUIT.
1) Disconnect the double lock module har-
ness connector.
2) Measure the resistance between harness
connector terminal and chassis ground when
turning the key cylinder lock switch to lock
position.
Connector & terminal
(B325) No. 2 — Chassis ground:Is the resistance less than 10
Ω?Go to step 2.Go to step 3.
2 CHECK KEY CYLINDER LOCK SWITCH CIR-
CUIT.
Measure the resistance between harness con-
nector terminal and chassis ground when turn-
ing the key cylinder lock switch to unlock
position.
Connector & terminal
(B325) No. 3 — Chassis ground:Is the resistance less than 10
Ω?Key cylinder lock
switch is nor mal.Go to step 3.

SL-13
SECURITY AND LOCK
Door Lock Control System
7. CHECK DOOR LOCK ACTUATOR (DOUBLE LOCK) AND CIRCUIT
3 CHECK KEY CYLINDER LOCK SWITCH.
1) Disconnect the key cylinder lock switch
connector.
2) Measure the resistance between key cylin-
der lock switch terminals when turning the key
cylinder lock switch to lock position.
Te r m i n a l s
No. 1 — No. 2Is the resistance less than 1
Ω?Go to step 4.Replace the key
cylinder lock
switch.
4 CHECK KEY CYLINDER LOCK SWITCH.
Measure the resistance between key cylinder
lock switch terminals when turning the key cyl-
inder lock switch to unlock position.
Te r m i n a l s
No. 2 — No. 3Is the resistance less than 1
Ω?Check the harness
for open or short
circuits between
double lock mod-
ule and key cylin-
der lock switch.Replace the key
cylinder lock
switch.
Step Check Yes No
1 CHECK OUTPUT SIGNAL.
Measure the resistance between double lock
module harness connector terminal and chas-
sis ground when turning the key cylinder lock
switch to lock position.
Connector & terminal
(B324) No. 3 (+) — Chassis ground (
−):Is the voltage more than 10 V? Go to step 2.Replace the dou-
ble lock module.
2 CHECK OUTPUT SIGNAL.
Measure the resistance between double lock
module harness connector terminal and chas-
sis ground when turning the key cylinder lock
switch to unlock position.
Connector & terminal
(B324) No. 6 (+) — Chassis ground (
−):Is the voltage more than 10 V? Go to step 3.Replace the dou-
ble lock module.
3 CHECK DOOR LOCK ACTUATOR.
Check door lock actuator.
Front door lock actuator: <Ref. to SL-25, Front
Door Lock Actuator.>
Rear door lock actuator: <Ref. to SL-29, Rear
Door Lock Actuator.>Is the door lock actuator nor-
mal?Check the harness
for open or short
circuits between
double lock mod-
ule and door lock
actuator.Replace the door
lock actuator. Step Check Yes No

SL-14
SECURITY AND LOCK
Keyless Entry System
3. Keyless Entry System
A: WIRING DIAGRAM
<Ref. to WI-200, WIRING DIAGRAM, Keyless Entry System.>
B: ELECTRICAL SPECIFICATION
Content Terminal No. Measuring condition
Key warning switch 1 (INPUT) Battery voltage is present when inserting the key into ignition switch.
Registration connector 2 (INPUT) 0 V is present when connecting the registration connector.
Door switch 3 (INPUT) 0 V is present when any door is open.
Power supply 5 Battery voltage is constantly present.
Empty 6 —
Empty 7 —
Door lock switch (Unlock) 8 (INPUT) 0 V is present when the door lock switch is turned to unlock position.
Empty 9 —
Door lock switch (Lock) 10 (INPUT) 0 V is present when the door lock switch is turned to lock position.
Room light/Ignition switch illumina-
tion11 (OUTPUT) 0 V is present when pressing the transmitter OPEN button.
 0 V is present when any door is open.
Turn signal light (Left) 12 (OUTPUT)Battery voltage is present when pressing the transmitter OPEN or LOCK
button.
Turn signal light (Right) 13 (OUTPUT)Battery voltage is present when pressing the transmitter OPEN or LOCK
button.
Ground 14 0 V is constantly present.
Power supply (Hazard light) 15 Battery voltage is constantly present.
Power supply 16 Battery voltage is constantly present.
Door, rear gate lock actuator (With-
out double lock) or double lock mod-
ule (With double lock)17 (OUTPUT) Battery voltage is present when pressing the transmitter OPEN button.
Door, rear gate lock actuator (With-
out double lock) or double lock mod-
ule (With double lock)18 (OUTPUT) Battery voltage is present when pressing the transmitter LOCK button.
SL-00036
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18

SL-15
SECURITY AND LOCK
Keyless Entry System
C: INSPECTION
1. SYMPTOM CHART
Symptom Repair order Reference
None of the functions of keyless entry
system operate.1. Check the transmitter battery. <Ref. to SL-16, CHECK TRANSMIT-
TER BATTERY, INSPECTION, Key-
less Entry System.>
2. Check the fuse. <Ref. to SL-16, CHECK FUSE,
INSPECTION, Keyless Entry Sys-
tem.>
3. Check the keyless entry control module power
supply and ground circuit.<Ref. to SL-17, CHECK POWER
SUPPLY AND GROUND CIRCUIT,
INSPECTION, Keyless Entry Sys-
tem.>
4. Replace the keyless entry control module. <Ref. to SL-39, Keyless Entry Control
Module.>
The transmitter cannot be registered. 1. Check the transmitter battery. <Ref. to SL-16, CHECK TRANSMIT-
TER BATTERY, INSPECTION, Key-
less Entry System.>
2. Check the registration connector circuit. <Ref. to SL-17, CHECK REGISTRA-
TION CONNECTOR CIRCUIT,
INSPECTION, Keyless Entry Sys-
tem.>
3. Check the door lock switch and circuit. <Ref. to SL-18, CHECK DOOR
SWITCH, INSPECTION, Keyless
Entry System.>
4. Replace the keyless entry control module. <Ref. to SL-39, Keyless Entry Control
Module.>
The door lock or unlock does not
operate.
N
OTE:
If the door lock control system does
not operate when using the door lock
switch, check the door lock control
system. <Ref. to SL-9, INSPECTION,
Door Lock Control System.>1. Check the transmitter battery. <Ref. to SL-16, CHECK TRANSMIT-
TER BATTERY, INSPECTION, Key-
less Entry System.>
2. Make sure the registration connector is not
connected.Make sure the registration connector
is not connected because keyless
entry system does not operate during
the registration connector connected.
3. Check the key warning switch. <Ref. to SL-19, CHECK KEY WARN-
ING SWITCH, INSPECTION, Keyless
Entry System.>
4. Check the door switch. <Ref. to SL-18, CHECK DOOR
SWITCH, INSPECTION, Keyless
Entry System.>
5. Check output signal to double lock module.
(With double lock)<Ref. to SL-21, CHECK OUTPUT
SIGNAL TO DOUBLE LOCK MOD-
ULE, INSPECTION, Keyless Entry
System.>
6. Replace the keyless entry control module. <Ref. to SL-39, Keyless Entry Control
Module.>
The hazard light does not operate. 1. Check the hazard light operation. <Ref. to SL-20, CHECK HAZARD
LIGHT OPERATION, INSPECTION,
Keyless Entry System.>
2. Replace the keyless entry control module. <Ref. to SL-39, Keyless Entry Control
Module.>

SL-16
SECURITY AND LOCK
Keyless Entry System
2. CHECK TRANSMITTER BATTERY
3. CHECK FUSE
The room light and ignition switch illu-
mination operation does not activate.1. Check the room light operation. <Ref. to SL-20, CHECK ROOM
LIGHT OPERATION, INSPECTION,
Keyless Entry System.>
2. Check the ignition switch illumination circuit. <Ref. to SL-21, CHECK IGNITION
SWITCH ILLUMINATION CIRCUIT,
INSPECTION, Keyless Entry Sys-
tem.>
3. Replace the keyless entry control module.
(without double lock)<Ref. to SL-39, Keyless Entry Control
Module.>
4. Replace the double lock module. (with double
lock)<Ref. to SL-40, Double Lock Mod-
ule.>
Step Check Yes No
1 CHECK TRANSMITTER BATTERY.
1) Remove the battery from transmitter. <Ref.
to SL-41, REMOVAL, Keyless Transmitter.>
2) Check the battery voltage. <Ref. to SL-41,
INSPECTION, Keyless Transmitter.>
NOTE:
If the transmitter battery voltage is 2.5 V or less,
the range of transmission becomes very short.Is the voltage more than 2.5 V? If further inspec-
tion is necessary,
refer to “SYMP-
TOM CHART”.
<Ref. to SL-15,
SYMPTOM
CHART, INSPEC-
TION, Keyless
Entry System.>Replace the trans-
mitter battery.
Step Check Yes No
1 CHECK FUSE.
Remove and visually check the fuse No. 2 (in
the main fuse box), No. 3 (in the fuse and relay
box) and SBF-6 (in the main fuse box)Is the fuse blown out? Replace the fuse
with a new one.Check the power
supply and ground
circuit. <Ref. to
SL-17, CHECK
POWER SUPPLY
AND GROUND
CIRCUIT,
INSPECTION,
Keyless Entry Sys-
tem.> Symptom Repair order Reference

SL-17
SECURITY AND LOCK
Keyless Entry System
4. CHECK POWER SUPPLY AND GROUND CIRCUIT
5. CHECK REGISTRATION CONNECTOR CIRCUIT
Step Check Yes No
1 CHECK POWER SUPPLY.
1) Disconnect the keyless entry control mod-
ule harness connector.
2) Measure the voltage between harness con-
nector terminal and chassis ground.
Connector & terminal
(B176) No. 5, No. 16 (+) — Chassis
ground (
−):Is the voltage more than 10 V? Go to step 2.Check the harness
for open circuits or
shorts between
keyless entry con-
trol module and
fuse.
2 CHECK GROUND CIRCUIT.
Measure the resistance between harness con-
nector terminal and chassis ground.
Connector & terminal
(B176) No. 6, No. 14 — Chassis ground:Is the resistance less than 10
Ω?The power supply
and ground circuit
are OK.Repair the har-
ness.
Step Check Yes No
1 REGISTRATION CONNECTOR INPUT VOLT-
AGE INSPECTION
1) Disconnect the registration connector.
2) Measure the voltage between keyless entry
control module harness connector and chassis
ground.
Connector & terminal
(B176) No. 2 (+) — Chassis ground (
−):Is the voltage more than 10 V? Go to step 2.Repair the har-
ness, and (or) con-
nector.
2 REGISTRATION CONNECTOR INPUT VOLT-
AGE INSPECTION
1) Connect the registration connector.
2) Measure the voltage between keyless entry
control module harness connector and chassis
ground.
Connector & terminal
(B176) No. 2 (+) — Chassis ground (
−):Is the voltage less than 0 V? Registration con-
nector circuit is
OK.Repair the har-
ness, and (or) con-
nector.

SL-18
SECURITY AND LOCK
Keyless Entry System
6. CHECK DOOR SWITCH
Step Check Yes No
1 CHECK DOOR SWITCH CIRCUIT.
Measure the voltage between keyless entry
control module harness connector terminal
and chassis ground.
N
OTE:
The voltage is not 0 V due to noise, etc.
Connector & terminal
(B176) No. 3 (+) — Chassis ground (
−):Is the voltage approx. less than
0 V when any one of the doors
or rear gate is opened?Go to step 2.Go to step 3.
2 CHECK DOOR SWITCH CIRCUIT.
Measure the voltage between keyless entry
control module harness connector terminal
and chassis ground.
Connector & terminal
(B176) No. 3 (+) — Chassis ground (
−):Is the voltage more than 10 V
when all doors and rear gate
are closed?The door switch is
OK.Go to step 3.
3 CHECK DOOR SWITCH.
1) Disconnect the door switch harness con-
nector.
2) Measure the resistance between door
switch terminals.
Te r m i n a l
Door switch No. 1 — No. 3:
Rear gate latch switch No. 1 — No. 2:Is the resistance more than 1
MΩ when the door switch is
pressed?Go to step 4.Replace the door
switch.
4 CHECK DOOR SWITCH.
Measure the resistance between door switch
terminals.
Te r m i n a l
Door switch No. 1 — No. 3:
Rear gate latch switch No. 1 — No. 2:Is the resistance less than 1 Ω
when the door switch is
released?Check the harness
for open circuits or
shorts between
keyless entry con-
trol module and
door switch.Replace the door
switch.

SL-19
SECURITY AND LOCK
Keyless Entry System
7. CHECK KEY WARNING SWITCH
Step Check Yes No
1 CHECK FUSE.
Remove and visually check the fuse No. 6 (in
the main fuse box).Is the fuse blown out? Go to step 2.Replace the fuse
with a new one.
2 CHECK KEY WARNING SWITCH CIRCUIT.
1) Disconnect the keyless entry control mod-
ule harness connector.
2) Insert the key into ignition switch. (LOCK
position)
3) Measure the voltage between harness con-
nector terminal and chassis ground.
Connector & terminal
(B176) No. 1 (+) — Chassis ground (
−):Is the voltage more than 10 V? Go to step 3.Go to step 4.
3 CHECK KEY WARNING SWITCH CIRCUIT.
1) Remove the key from ignition switch.
2) Measure the voltage between harness con-
nector terminal and chassis ground.
NOTE:
The voltage is not 0 V due to noise, etc.
Connector & terminal
(B176) No. 1 (+) — Chassis ground (
−):Is the voltage approx. less than
0 V?The key warning
switch is OK.Go to step 4.
4 CHECK KEY WARNING SWITCH.
1) Disconnect the key warning switch harness
connector.
2) Insert the key into ignition switch. (LOCK
position)
3) Measure the resistance between key warn-
ing switch terminals.
Te r m i n a l
No. 1 — No. 2:Is the resistance less than 1
Ω?Go to step 5.Replace the key
warning switch.
5 CHECK KEY WARNING SWITCH.
1) Remove the key from ignition switch.
2) Measure the resistance between key warn-
ing switch terminals.
Te r m i n a l
No. 1 — No. 2:Is the resistance less than 1
MΩ?Check the follow-
ing:
Harness for
open circuits or
shorts between
the key warn-
ing switch and
fuse
Harness for
open circuits
and shorts
between the
keyless entry
control module
and key warn-
ing switchReplace the key
warning switch.

SL-20
SECURITY AND LOCK
Keyless Entry System
8. CHECK HAZARD LIGHT OPERATION
9. CHECK ROOM LIGHT OPERATION
Step Check Yes No
1 CHECK HAZARD LIGHT OPERATION.
Make sure the hazard light blinks when hazard
switch is turned ON.Does the hazard light blink? Go to step 2.Check the hazard
light circuit.
2 CHECK OUTPUT SIGNAL.
1) Remove the key from ignition switch.
2) Close all doors and rear gate.
3) Measure the voltage between keyless entry
control module harness connector terminal
and chassis ground when LOCK or OPEN but-
ton of transmitter is pressed.
Connector & terminal
(B176) No. 12, No. 13 (+) — Chassis
ground (
−):Is the voltage more than 10 V? Check the harness
for open or short
between keyless
entry control mod-
ule and turn signal
lights.Replace the key-
less entry control
module.
Step Check Yes No
1 CHECK ROOM LIGHT OPERATION.
Make sure the room light illuminates when the
room light switch is turned ON.Does the room light illuminate? Go to step 2.Check the room
light circuit.
2 CHECK HARNESS BETWEEN ROOM LIGHT
AND KEYLESS ENTRY CONTROL MODULE
(WITHOUT DOUBLE LOCK) OR DOUBLE
LOCK MODULE (WITH DOUBLE LOCK).
1) Disconnect the keyless entry control mod-
ule or double lock module harness connector
and room light harness connector.
2) Measure the resistance between keyless
entry control module or double lock module
harness connector terminal and room light har-
ness connector terminal.
Connector & terminal
Without double lock:
(B176) No. 11 — (R52) No. 2:
With double lock:
(B325) No. 1 — (R52) No. 2:Is the resistance less than 10
Ω?The room light
operation circuit is
OK.Check the harness
for open circuits or
shorts between
keyless entry con-
trol module (With-
out double lock) or
double lock mod-
ule (With double
lock) and room
light.