1996 SUBARU LEGACY relay

A: LO MODE OPERATION
CONDITION:
Condition (1) :
Engine coolant temperature is below 89°C (192°F).
A/C switch is turned ON.
Vehicle speed is below 10 km/h (6 MPH).
Condition (2) :
Engine coolant temperature is above 95°C (203°F).
A/C switch is turned OFF.
Vehicle speed is below 10 km/h (6 MPH).
TROUBLE SYMPTOM:
Radiator sub fan does not rotate at LO speed under
conditions (1) and (2) above.
1. Check fuse and power supply.
OK
Not OK
Melted fuse,repair the shorted part of the circuit
,replace fuse.
2. Check harness connector between fuse and
relay box, and sub fan motor.
OK
Not OK
Repair or replace wiring harness.
3. Check ground circuit of sub fan motor.
OK
Not OK
Repair or replace wiring harness.
4. Check sub fan motor.
OK
Not OK
Replace sub fan motor.
Refer to 2-7 On-Board Diagnostics II System.




31
2-5DIAGNOSTICS
3. Radiator Sub Fan (With A/C model only)

B2M0427A
1. CHECK FUSE AND POWER SUPPLY.
1) Check fuse No. 13.
2) Turn ignition switch to ACC.
3) Measure voltage between fuse and relay box, and body.
Connector & terminal / Specified voltage:
(F40) No. 3—Body / 10 V, or more
B2M0377A
2. CHECK HARNESS CONNECTOR BETWEEN FUSE
AND RELAY BOX, AND SUB FAN MOTOR.
1) Turn ignition switch to OFF.
2) Disconnect connectors from fuse and relay box, and
sub fan motor.
3) Measure resistance of harness connector between fuse
and relay box, and sub fan motor.
Connector & terminal / Specified resistance:
(F40) No. 3—(F16) No. 2 / 10Ω, max.
B2M0378A
3. CHECK GROUND CIRCUIT OF SUB FAN MOTOR.
Measure resistance between sub fan motor connector and
body.
Connector & terminal / Specified resistance:
(F16) No. 1—Body / 10Ω, max.
B2M0372A
4. CHECK SUB FAN MOTOR.
1) Disconnect connector from sub fan motor.
2) Connect battery positive (+) terminal to terminal No. 2
and connect terminal No. 1 to ground. Ensure that fan
rotates at LO speed.
32
2-5DIAGNOSTICS
3. Radiator Sub Fan (With A/C model only)

B: HI MODE OPERATION
CONDITION:
Condition (1) :
Engine coolant temperature is below 89°C (192°F).
A/C switch is turned ON.
Vehicle speed is over 20 km/h (12 MPH).
Condition (2) :
Engine coolant temperature is above 95°C (203°F).
A/C switch is turned OFF.
Vehicle speed is over 20 km/h (12 MPH).
Condition (3) :
Engine coolant temperature is above 95°C (203°F).
A/C switch is turned ON.
TROUBLE SYMPTOM:
Radiator sub fan does not rotate at HI speed under con-
ditions (1), (2) and (3) above.
1. Check operation of sub fan motor LO mode.
OK
Not OK
Check LO mode operation.
2. Check power supply to sub fan relay-2.
OK
Not OK
Melted fuse (in A/C relay holder),repair the
shorted part of the circuit,replace fuse.
3. Check sub fan relay-2.
OK
Not OK
Replace sub fan relay-2.
4. Check harness connector between sub fan
relay-2 and sub fan motor.
OK
Not OK
Repair or replace wiring harness.
5. Check ground circuit of sub fan motor.
OK
Not OK
Repair or replace wiring harness.
6. Check sub fan motor.
OK
Not OK
Replace sub fan motor.
Refer to 2-7 On-Board Diagnostics II System.






33
2-5DIAGNOSTICS
3. Radiator Sub Fan (With A/C model only)

1. CHECK OPERATION OF SUB FAN MOTOR LO
MODE.
Check that radiator sub fan rotates at LO speed under each
condition described under LO mode operation. [K3A0].>
B2M0379A
2. CHECK POWER SUPPLY TO SUB FAN RELAY-2.
1) Turn ignition switch to OFF.
2) Disconnect connector from A/C relay holder.
3) Measure voltage between A/C relay holder connector
and body.
Connector & terminal / Specified voltage:
(F29) No. 1—Body / 1 V, max.
(F29) No. 2—Body / 1 V, max.
4) Turn ignition switch to ON.
5) Measure voltage between A/C relay holder connector
and body.
Connector & terminal / Specified voltage:
(F29) No. 1—Body / 10 V, or more
(F29) No. 2—Body / 10 V, or more
B2M0370A
3. CHECK SUB FAN RELAY-2.
1) Turn ignition switch to OFF.
2) Remove sub fan relay-2 from A/C relay holder.
3) Check continuity between terminals (indicated in table
below) when terminal (1) is connected to battery and ter-
minal (3) is grounded.
When current flows.Between terminals (2)
and (4)Continuity exists.
When current does not
flow.Between terminals (2)
and (4)Continuity does not
exist.
Between terminals (1)
and (3)Continuity exists.
34
2-5DIAGNOSTICS
3. Radiator Sub Fan (With A/C model only)

B2M0397A
4. CHECK HARNESS CONNECTOR BETWEEN SUB
FAN RELAY-2 AND SUB FAN MOTOR.
1) Disconnect connectors from sub fan relay-2 and sub fan
motor.
2) Measure resistance of harness connector between sub
fan relay-2 and sub fan motor.
Connector & terminal / Specified resistance:
(F29) No. 4—(F16) No. 3 / 10Ω, max.
B2M0398A
5. CHECK GROUND CIRCUIT OF SUB FAN MOTOR.
Measure resistance between sub fan motor connector and
body.
Connector & terminal / Specified resistance:
(F16) No. 1—Body / 10Ω, max.
B2M0368A
6. CHECK SUB FAN MOTOR.
1) Disconnect connector from sub fan motor.
2) Connect battery positive (+) terminal to terminals No. 2
and No.3, and connect terminal No. 1 to ground. Ensure
that fan rotates at HI speed.
35
2-5DIAGNOSTICS
3. Radiator Sub Fan (With A/C model only)

FUEL INJECTION SYSTEM2-7
Page
C COMPONENT PARTS....................................................................................2
1. Intake Manifold.........................................................................................2
2. Air Intake System.....................................................................................3
3. Air Cleaner ...............................................................................................4
W SERVICE PROCEDURE...............................................................................5
1. Air Cleaner and Air Intake Duct ...............................................................5
2. Mass Air Flow Sensor ..............................................................................6
3. Throttle Body............................................................................................7
4. Intake Manifold.........................................................................................8
5. Engine Coolant Temperature Sensor ....................................................18
6. Crankshaft Position Sensor ...................................................................18
7. Front Oxygen Sensor.............................................................................19
8. Rear Oxygen Sensor .............................................................................21
9. Throttle Position Sensor ........................................................................24
10. Camshaft Position Sensor .....................................................................25
11. Pressure Sensor (AT model)..................................................................25
12. Idle Air Control Solenoid Valve ..............................................................26
13. Pressure Sources Switching Solenoid Valve (AT model) ......................27
14. Fuel Injector ...........................................................................................28
15. Engine Control Module ..........................................................................28
16. Main Relay .............................................................................................30
17. Fuel Pump Relay ...................................................................................31

G6M0095
16. Main Relay
A: REMOVAL AND INSTALLATION
1) Disconnect battery ground cable.
B5M0024A
2) Remove lower cover and then disconnect connectors.
3) Lower transmission control module.
4) Remove the front pillar lower trim.

5) Remove fuse box mounting nuts.
6) Lower fuse box.
7) Remove fuse box mounting bracket.
G2M0438
8) Remove screw which retains bracket of main relay
1
and fuel pump relay
2.
9) Disconnect connector from main relay.
G2M0438
10) Installation is in the reverse order of removal.


1Main relay


2Fuel pump relay
30
2-7SERVICE PROCEDURE
16. Main Relay

G6M0095
17. Fuel Pump Relay
A: REMOVAL AND INSTALLATION
1) Disconnect battery ground cable.
B5M0024A
2) Remove lower cover and then disconnect connectors.
3) Lower transmission control module.
4) Remove the front pillar lower trim.

5) Remove fuse box mounting nuts.
6) Lower fuse box.
7) Remove fuse box mounting bracket.
G2M0438
8) Remove fuel pump relay from main relay and fuel pump
relay mounting bracket.
9) Disconnect connector from fuel pump relay.
G2M0438
10) Installation is in the reverse order of removal.


1Main relay


2Fuel pump relay
31
2-7SERVICE PROCEDURE
17. Fuel Pump Relay