1996 SUBARU LEGACY window

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






75
6-2DIAGNOSTICS
4. Power Window

B6M0391A
2. CHECK POWER WINDOW RELAY.
1) Disconnect connector of power window relay.
2) Connect battery to terminal No. 1 and ground terminal
No. 3.
3) Check continuity between terminals as indicated in
table below:
When current flows. Between terminals
No. 2 and No. 4Continuity exists.
When current does not flow. Between terminals
No. 2 and No. 4Continuity does not
exist.
Between terminals
No. 1 and No. 3Continuity exists.
B6M0392A
3. CHECK GROUND CIRCUIT OF POWER WINDOW
RELAY.
1) Disconnect connector of power window relay.
2) Measure resistance of harness connector between
power window relay and body.
Connector & terminal / Specified resistance:
(B42) No. 3—Body / 10Ω, max.
B6M0393A
4. CHECK HARNESS CONNECTOR BETWEEN
POWER WINDOW RELAY AND POWER WINDOW
MAIN SWITCH (DRIVER’S DOOR SWITCH).
1) Disconnect connectors of power window relay and
power window main switch.
2) Measure resistance of harness connector between
power window relay and power window main switch.
Connector & terminal / Specified resistance:
(B42) No. 4—(D7) No.7/10Ω, max.
5. CHECK POWER WINDOW MAIN SWITCH.
Refer to 6-2 [W16B1] for inspection of power window main
switch.
76
6-2DIAGNOSTICS
4. Power Window

B6M0394A
6. CHECK GROUND CIRCUIT OF POWER WINDOW
MAIN SWITCH.
1) Disconnect connector of power window main switch.
2) Measure resistance of harness connector between
power window main switch and body.
Connector & terminal / Specified resistance:
(D7) No. 12—Body / 10Ω, max.
77
6-2DIAGNOSTICS
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.





78
6-2DIAGNOSTICS
4. Power Window

B6M0394A
3. CHECK GROUND CIRCUIT OF POWER WINDOW
MAIN SWITCH.
1) Disconnect connector of power window main switch.
2) Measure resistance of harness connector between
power window main switch and body.
Connector & terminal / Specified resistance:
(D7) No. 12—Body / 10Ω, max.
4. CHECK DRIVER’S DOOR WINDOW MOTOR.
1) Disconnect connector of power window motor (driver’s
door).
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.
B6M0396A
5. CHECK HARNESS CONNECTOR BETWEEN
POWER WINDOW MAIN SWITCH AND DRIVER’S
DOOR WINDOW MOTOR.
1) Disconnect connectors of power window main switch
and power window motor (driver’s door).
2) Measure resistance of harness connector between
power window main switch and power window motor.
Connector & terminal / Specified resistance:
LHD model:
(D7) No. 8—(D3) No.2/10Ω, max.
(D7) No. 13—(D3) No.1/10Ω, max.
RHD model:
(D7) No. 6—(D3) No.2/10Ω, max.
(D7) No. 11—(D3) No.1/10Ω, max.
79
6-2DIAGNOSTICS
4. Power Window

C: DIAGNOSTICS PROCEDURE-3
Trouble symptom C: One or more of passenger’s door win-
dow do not operate.
1. Check power supply for power window sub
switch which is out of order.
OK
Not OK
Repair or replace wiring harness.
2. Check power window sub switch which is out
of order.
OK
Not OK
Replace power window sub switch.
3. Check power window motor which is out of
order.
OK
Not OK
Replace power window motor.
4. Check harness connector between power
window sub switch and power window motor.
OK
Not OK
Repair or replace wiring harness.
5. Check harness connector between power
window sub switch and main switch.
OK
Not OK
Repair or replace wiring harness.
6. Check power window main switch.
OK
Not OK
Replace power window main switch.
7. Check ground circuit of power window main
switch.
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.







80
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)
81
6-2DIAGNOSTICS
4. Power Window

B6M0399A
B6M0467A
B6M0468A
5. CHECK HARNESS CONNECTOR BETWEEN
POWER WINDOW SUB SWITCH AND MAIN SWITCH.
1) Disconnect connectors of power window sub switch and
main switch.
2) Measure resistance of harness connector between
power window sub switch and main switch.
Connector & terminal / Specified resistance:
LHD model:
(D17) No. 1—(D7) No.9/10Ω, max.
(Front passenger)
(D17) No. 3—(D7) No. 14 / 10Ω, max.
(Front passenger)
(D31) No. 1—(D7) No.6/10Ω, max. (Rear RH)
(D31) No. 3—(D7) No. 11 / 10Ω, max. (Rear RH)
(D25) No. 1—(D7) No. 10 / 10Ω, max. (Rear LH)
(D25) No. 3—(D7) No.5/10Ω, max. (Rear LH)
RHD model:
(D17) No. 1—(D7) No. 10 / 10Ω, max.
(Front passenger)
(D17) No. 3—(D7) No.5/10Ω, max.
(Front passenger)
(D31) No. 1—(D7) No.9/10Ω, max. (Rear RH)
(D31) No. 3—(D7) No. 14 / 10Ω, max. (Rear RH)
(D25) No. 1—(D7) No. 13 / 10Ω, max. (Rear LH)
(D25) No. 3—(D7) No.8/10Ω, max. (Rear LH)
6. CHECK POWER WINDOW MAIN SWITCH.
Refer to 6-2 [W16B1] for inspection of power window main
switch.
B6M0394A
7. CHECK GROUND CIRCUIT OF POWER WINDOW
MAIN SWITCH.
1) Disconnect connector of power window main switch.
2) Measure resistance of harness connector between
power window main switch and body.
Connector & terminal / Specified resistance:
(D7) No. 12—Body / 10Ω, max.
82
6-2DIAGNOSTICS
4. Power Window