Page 617 of 2890
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)
Page 618 of 2890

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)
Page 619 of 2890

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)
Page 620 of 2890
![SUBARU LEGACY 1996 Service Repair Manual 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. <Ref. to 2-5
[K3A0].>
B2M0379A
2. CHECK POWER SUPPL SUBARU LEGACY 1996 Service Repair Manual 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. <Ref. to 2-5
[K3A0].>
B2M0379A
2. CHECK POWER SUPPL](/manual-img/17/57433/w960_57433-619.png)
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)
Page 621 of 2890
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)
Page 622 of 2890

1. Intake Manifold
B2M0739A
1Intake manifold gasket LH
(2200 cc model)
2Intake manifold gasket RH
(2200 cc model)
3Intake manifold gasket LH
(2500 cc model)
4Intake manifold gasket RH
(2500 cc model)
5Fuel injector pipe insulator
6Fuel injector pipe
7O-ring A
8O-ring B
9Fuel injector
10Insulator
11Fuel injector cap
12Plate
13Sealing
14Gasket
15Engine coolant hose B
16Air by-pass hose
17Idle air control solenoid valve
18Engine coolant hose A
19Nipple (AT model)
20Plug
21PCV valve
22Purge control solenoid valve
23Nipple
24BPT
25BPT holder bracket
26Back pressure hose
27EGR vacuum hose A
28EGR vacuum pipe
29EGR vacuum hose C
30EGR valve
31Gasket
32EGR vacuum hose B
33EGR solenoid valve
34EGR pipe
35Collar
36Intake manifold
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 3.4±0.5 (0.35±0.05, 2.5±0.4)
T2: 6.4±0.5 (0.65±0.05, 4.7±0.4)
T3: 16±1.5 (1.6±0.15, 11.6±1.1)
T4: 19±1 (1.9±0.1, 13.7±0.7)
T5: 19±1.5 (1.9±0.15, 13.7±1.1)
T6: 23±3 (2.3±0.3, 16.6±2.2)
T7: 25±2 (2.5±0.2, 18.1±1.4)
T8: 34±2 (3.5±0.2, 25.3±1.4)
2
2-7COMPONENT PARTS
1. Intake Manifold
Page 623 of 2890
2. Air Intake System
B2M0152A
1Gasket
2Throttle position sensor
3Throttle body
4Clamp
5Air intake duct
6By-pass hose
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 2.2±0.2 (0.22±0.02, 1.6±0.1)
T2: 22±2 (2.2±0.2, 15.9±1.4)
3
2-7COMPONENT PARTS
2. Air Intake System
Page 624 of 2890
3. Air Cleaner
B2M0153A
1Mass air flow sensor bracket
2Mass air flow sensor ASSY
3Air cleaner upper cover
4Air cleaner element
5Spacer
6Bush
7Clip
8Air cleaner case
9Cushion rubber
10Air intake duct
11Resonator chamber ASSY
12Clip
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 7.4±2.0 (0.75±0.2, 5.4±1.4)
T2: 33±10 (3.4±1.0, 25±7)
4
2-7COMPONENT PARTS
3. Air Cleaner