1997 SUBARU LEGACY ignition

4. Power Window
A: DIAGNOSTICS PROCEDURE-1
Trouble symptom A: All door windows do not operate.
1. Check fuse and power supply.
OK
Not OK

Replace fuse or circuit breaker.

Repair or replace wiring harness.
2. Check power window relay.
OK
Not OK
Replace power window relay.
3. Check ground circuit of power window relay.
OK
Not OK
Repair or replace wiring harness.
4. Check harness connector between power
window relay and power window main switch
(driver’s door switch).
OK
Not OK
Repair or replace wiring harness.
5. Check power window main switch.
OK
Not OK
Replace power window main switch.
6. Check ground circuit of power window main
switch.
OK
Not OK
Repair or replace wiring harness.
System is OK.
B6M0390A
1. CHECK FUSE AND POWER SUPPLY.
1) Check fuse No. 15.
2) Disconnect connector of power window relay.
3) Turn ignition switch to ON.
4) Measure voltage between power window relay connec-
tor and body.
Connector & terminal / Specified voltage:
(B42) No. 1—Body / 10 V, or more
(B42) No. 2—Body / 10 V, or more






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4. Power Window

B: DIAGNOSTICS PROCEDURE-2
Trouble symptom B: Only driver’s door window does not
operate.
1. Check power supply for power window main
switch.
OK
Not OK
Go to diagnostics procedure of trouble symptom A.

2. Check power window main switch (driver’s
door switch).
OK
Not OK
Replace power window main switch.
3. Check ground circuit of power window main
switch.
OK
Not OK
Repair or replace wiring harness.
4. Check driver’s door window motor.
OK
Not OK
Replace power window motor.
5. Check harness connector between power
window main switch and driver’s door
window motor.
OK
Not OK
Repair or replace wiring harness.

System circuit is OK.

Mechanical trouble may be caused in door
window system such as break of window
regulator.
B6M0395A
1. CHECK POWER SUPPLY FOR POWER WINDOW
MAIN SWITCH.
1) Disconnect connector of power window main switch.
2) Turn ignition switch to ON.
3) Measure voltage between power window main switch
connector and body.
Connector & terminal / Specified voltage:
(D7) No. 7—Body / 10 V, or more
2. CHECK POWER WINDOW MAIN SWITCH
(DRIVER’S DOOR SWITCH).
Refer to 6-2 [W16B1] for inspection of power window main
switch.





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6-2DIAGNOSTICS
4. Power Window

B6M0397A
1. CHECK POWER SUPPLY FOR POWER WINDOW
SUB SWITCH WHICH IS OUT OF ORDER.
1) Disconnect connector of power window sub switch.
2) Turn ignition switch to ON.
3) Measure voltage between power window sub switch
connector and body.
Connector & terminal / Specified voltage:
(D17) No. 5—Body / 10 V, or more
(Front passenger)
(D31) No. 5—Body / 10 V, or more (Rear RH)
(D25) No. 5—Body / 10 V, or more (Rear LH)
2. CHECK POWER WINDOW SUB SWITCH WHICH IS
OUT OF ORDER.
Refer to 6-2 [W16B2] for inspection of power window sub
switch.
3. CHECK POWER WINDOW MOTOR WHICH IS OUT
OF ORDER.
1) Disconnect connector of power window motor.
2) Make sure that power window motor rotates properly
when battery voltage is applied to terminals of motor con-
nector.
3) Change polarity of battery connections to terminals to
ensure that motor rotates in reverse direction.
B6M0398A
4. CHECK HARNESS CONNECTOR BETWEEN
POWER WINDOW SUB SWITCH AND POWER
WINDOW MOTOR.
1) Disconnect connectors of power window sub switch and
power window motor.
2) Measure resistance of harness connector between
power window sub switch and power window motor.
Connector & terminal / Specified resistance:
(D17) No. 2—(D13) No.1/10Ω, max.
(Front passenger)
(D17) No. 4—(D13) No.2/10Ω, max.
(Front passenger)
(D31) No. 2—(D30) No.1/10Ω, max. (Rear RH)
(D31) No. 4—(D30) No.2/10Ω, max. (Rear RH)
(D25) No. 2—(D24) No.1/10Ω, max. (Rear LH)
(D25) No. 4—(D24) No.2/10Ω, max. (Rear LH)
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6-2DIAGNOSTICS
4. Power Window

5. Remote Controlled Rearview Mirror
A: DIAGNOSTICS PROCEDURE
1. Check fuse and power supply for remote
controlled rearview mirror switch.
OK
Not OK

Replace fuse.

Repair or replace wiring harness.
2. Check ground circuit of rearview mirror
switch.
OK
Not OK
Repair or replace wiring harness.
3. Check rearview mirror switch.
OK
Not OK
Replace rearview mirror switch.
4. Check harness connector between rearview
mirror switch and rearview mirror (RH and
LH).
OK
Not OK
Repair or replace wiring harness.
5. Check rearview mirror motor.
OK
Not OK
Replace rearview mirror.
System is OK.
B6M0400A
1. CHECK FUSE AND POWER SUPPLY FOR REMOTE
CONTROLLED REARVIEW MIRROR SWITCH.
1) Check fuse No. 3.
2) Disconnect connector of rearview mirror switch.
3) Turn ignition switch to ON.
4) Measure voltage between rearview mirror switch con-
nector and body.
Connector & terminal / Specified voltage:
(i6) No. 4—Body / 10 V, or more
B6M0401A
2. CHECK GROUND CIRCUIT OF REARVIEW
MIRROR SWITCH.
1) Disconnect connector of rearview mirror switch.
2) Measure resistance of harness connector between
rearview mirror switch and body.
Connector & terminal / Specified resistance:
(i6) No. 2—Body / 10Ω, max.





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6-2DIAGNOSTICS
5. Remote Controlled Rearview Mirror

6. Security System
A: ELECTRICAL COMPONENTS LOCATION
B6M0403A
1Security control module

2Security indicator light

3RH door key cylinder lock/unlock switch (built-in tamper
switch)

4Door switch

5Door lock/unlock switch

6Trunk lid key cylinder unlock switch (SEDAN) (built-in tamper
switch)

7Trunk lid switch (SEDAN)

8Rear gate key cylinder lock/unlock switch (WAGON)
9Rear gate switch (WAGON)

10LH door key cylinder lock/unlock switch (built-in tamper
switch)

11Starter interrupt relay

12Headlight alarm relay

13Ignition switch (ACC position)

14Engine hood switch

15Horn

16Headlight
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6-2DIAGNOSTICS
6. Security System

C: CONTROL MODULE I/O SIGNAL
B6M0405
Content Terminal No.Measuring conditions and I/O signals
(Ignition switch ACC position)
Door lock/unlock switch1
(INPUT)
Battery voltage is present when all doors and rear gate (WAGON) are locked.

“0”volt is present when one of the doors or rear gate (WAGON) is unlocked.
Key cylinder lock switch2
(INPUT)
“0”volt is present when key cylinder is turned to LOCK position.

Battery voltage is present when key cylinder is in positions other than LOCK.
Tamper switch3
(INPUT)
Battery voltage is present when key cylinder switch is installed to key cylinder.

“0”volt is present when key cylinder switch is removed from key cylinder.
Door switch4
(INPUT)
Battery voltage is present when all doors are closed.

“0”volt is present when one of the doors is open.
Starter interrupt relay5
(OUTPUT)
Battery voltage is present when ignition switch is turned ACC or ON.

“0”volt is present when security system is in alarm state.
Ignition switch (ACC)6
(INPUT)
Battery voltage is present when ignition switch is turned ACC or ON.

“0”volt is present when ignition switch is turned OFF.
Security indicator light7
(OUTPUT)
Battery voltage is present when indicator light goes off.

“0”volt is present when indicator light illuminates.
Power supply (back-up) 8 Battery voltage is constantly present.
Ground 9—
Engine hood switch10
(INPUT)
Battery voltage is present when engine hood is closed.

“0”volt is present when engine hood is open.
Trunk lid switch (SEDAN)
Rear gate switch (WAGON)11
(INPUT)
Battery voltage is present when trunk lid or rear gate is closed.

“0”volt is present when trunk lid or rear gate is open.
Headlight alarm relay12
(OUTPUT)
Battery voltage is present when ignition switch is turned ACC or ON.

“0”volt and battery voltage repeats in alarm state. (Headlights flash intermittently
at 0.2 sec. ON and 0.6 sec. OFF intervals).
Horn relay13
(OUTPUT)
Battery voltage is present when ignition switch is turned ACC or ON.

“0”volt and battery voltage repeats in alarm state. (Horn sounds intermittently at
0.2 sec. ON and 0.6 sec. OFF intervals.)
Key cylinder unlock switch14
(INPUT)
“0”volt is present when key cylinder is turned to UNLOCK position.

Battery voltage is present when key cylinder is in positions other than UNLOCK.
Trunk lid key cylinder unlock
switch (SEDAN)15
(INPUT)
“0”volt is present when trunk lid key cylinder is turned to UNLOCK position.

Battery voltage is present when trunk lid key cylinder is in positions other than
UNLOCK.
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6-2DIAGNOSTICS
6. Security System

D: BASIC DIAGNOSTICS PROCEDURE
Start security system check.
Fully open all door windows and turn ignition switch OFF.
Take key out of ignition, exit vehicle and lock driver’s door.
Indicator light illuminates.
OK The light flashes.
 The light does not
illuminate.
Check indicator harness.
Check security indicator light.
Check driver’s door key cylinder lock/unlock switch.
Check security control module.
Check whether switch input signal remains UNLOCK.
Check wiring harness.
Check switch input signals.
(Harnesses and switches separately)
(Tamper, door, hood, trunk and rear gate
switch)Check security control module.
Wait for 30 seconds.
Indicator light flashes at long intervals (0.2 sec. ON and 2.4 sec.
OFF).
OK
 Not OK
Check security control module.
Unlock driver’s door using the inside lock knob and open door.
The horn sounds and headlights flash intermittently at 0.2 sec. ON
and 0.6 sec. OFF intervals.
The engine will not start even if the ignition switch is turned to
START. Indicator lamp goes out.
OK Starter motor runs.
 All are not OK.
Check driver’s door switch.
Check wiring harness.
Check security control module.
 Horn is not OK.
Check horn
operation by
pushing horn pad
on steering wheel.
OK
 Not OK
Check horn.
Check horn relay.
Check security control module.
Check harness between horn relay and security control module.
 Headlights are not
OK.
Check headlights
operation by
turning light switch
ON/OFF.
OK
 Not OK
Check headlight
bulbs.
Check combination
switch.
Check headlight
relay.
Check starter interrupt relay.
Check wiring harness.
Check security control module.Check headlight alarm relay.
Check security control module.
Check wiring harness.
The alarm system continues to operate for 150 seconds.
OK Not OK
The horn and
headlights turn off.
The starter motor
does not run.
OK
 Not OK
Check security
control module.
Unlock the driver’s door using ignition key.
Continues to next step.














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6-2DIAGNOSTICS
6. Security System

From the previous step
Starter motor runs.
OK
 Not OK
Check starter interrupt relay.
Check wiring harness.
Check security control module.
Check driver’s door unlock switch.
Lock the driver’s door without using a ignition key. (Set the inside
lock knob to LOCK and then close the door while lifting the outer
handle).
Within 30 seconds after the above step, open rear LH door.
Indicator light flashes with short intervals (1 Hz).
OK
 Not OK
Check rear LH door switch.
Check rear LH door switch harness.
Check security control module.
Close and lock door.
Indicator light illuminates continuously.
OK
Perform the above steps also on the rear RH door and front RH
door.
OK
 Not OK
Check rear and front RH door switches.
Check wiring harnesses.
Check security control module.
Pull engine hood opener lever and open engine hood.
Indicator light flashes at short intervals (1 Hz).
OK
 Not OK
Check hood switch.
Check hood switch harness.
Check security control module.
Close engine hood.
Indicator light illuminates continuously.
SEDAN
 WAGON
Unlock rear gate by operating driver’s door inside lock knob and
open rear gate.
Pull trunk opener lever and open trunk lid.Indicator light flashes at short intervals (1 Hz).
OK Not OK
Indicator light flashes at short intervals (1 Hz).
OK Not OKCheck rear gate switch.
Check rear gate switch harness.
Check security control module.
Check trunk switch.
Check trunk switch harness.
Check security control module.Close rear gate and lock by locking driver’s door using a
ignition key.
Close trunk lid.Indicator light illuminates continuously.
Indicator light illuminates continuously.Wait for 30 seconds.
Wait for 30 seconds.Indicator light flashes at long intervals (0.2 sec. ON and 2.4
sec. OFF).
Continues to next step. Continues to next step.


















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6-2DIAGNOSTICS
6. Security System