Page 465 of 3342

B2M0369A
1. CHECK POWER SUPPLY TO MAIN FAN RELAY-1.
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:
(F28) No. 2—Body / 10 V, or more
(F28) No. 1—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:
(F28) No. 1—Body / 10 V, or more
B2M0370A
2. CHECK MAIN FAN RELAY-1.
1) Turn ignition switch to OFF.
2) Remove main fan relay-1 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.
B2M0371A
3. CHECK HARNESS CONNECTOR BETWEEN MAIN
FAN RELAY-1 AND MAIN FAN MOTOR.
1) Disconnect connectors from main fan relay-1 and main
fan motor.
2) Measure resistance of harness connector between
main fan relay-1 and main fan motor.
Connector & terminal / Specified resistance:
(F28) No. 4—(F17) No.2 / 10Ω, max.
25
2-5DIAGNOSTICS
2. Radiator Main Fan
Page 466 of 3342
B2M0367A
4. CHECK GROUND CIRCUIT OF MAIN FAN MOTOR.
Measure resistance between main fan motor connector
and body.
Connector & terminal / Specified resistance:
(F17) No. 1—Body / 10Ω, max.
B2M0372A
5. CHECK MAIN FAN MOTOR.
1) Disconnect connector from main 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.
26
2-5DIAGNOSTICS
2. Radiator Main Fan
Page 467 of 3342

C: HI MODE OPERATION (WITH A/C MODEL)
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 main fan does not rotate at HI speed under
conditions (1), (2) and (3) above.
1. Check operation of main fan motor LO mode.
OK
Not OK
Check LO mode operation.
2. Check power supply to main fan relay-2.
OK
Not OK
Melted fuse (in A/C relay holder),repair the
shorted part of the circuit,replace fuse.
3. Check main fan relay-2.
OK
Not OK
Replace main fan relay-2.
4. Check harness connector between main fan
relay-2 and main fan motor.
OK
Not OK
Repair or replace wiring harness.
5. Check ground circuit of main fan motor.
OK
Not OK
Repair or replace wiring harness.
6. Check main fan motor.
OK
Not OK
Replace main fan motor.
Refer to 2-7 On-Board Diagnostics II System.
27
2-5DIAGNOSTICS
2. Radiator Main Fan
Page 468 of 3342
![SUBARU LEGACY 1997 Service Repair Manual 1. CHECK OPERATION OF MAIN FAN MOTOR LO
MODE.
Check that radiator main fan rotates at LO speed under
each condition described under LO mode operation. <Ref.
to 2-5 [K2B0].>
B2M0374A
2. CHECK POWER SUP SUBARU LEGACY 1997 Service Repair Manual 1. CHECK OPERATION OF MAIN FAN MOTOR LO
MODE.
Check that radiator main fan rotates at LO speed under
each condition described under LO mode operation. <Ref.
to 2-5 [K2B0].>
B2M0374A
2. CHECK POWER SUP](/manual-img/17/57434/w960_57434-467.png)
1. CHECK OPERATION OF MAIN FAN MOTOR LO
MODE.
Check that radiator main fan rotates at LO speed under
each condition described under LO mode operation.
to 2-5 [K2B0].>
B2M0374A
2. CHECK POWER SUPPLY TO MAIN 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:
(F30) No. 2—Body / 10 V, or more
(F30) No. 1—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:
(F30) No. 1—Body / 10 V, or more
B2M0370A
3. CHECK MAIN FAN RELAY-2.
1) Turn ignition switch to OFF.
2) Remove main 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.
28
2-5DIAGNOSTICS
2. Radiator Main Fan
Page 469 of 3342
B2M0375A
4. CHECK HARNESS CONNECTOR BETWEEN MAIN
FAN RELAY-2 AND MAIN FAN MOTOR.
1) Disconnect connectors from main fan relay-2 and main
fan motor.
2) Measure resistance of harness connector between
main fan relay-2 and main fan motor.
Connector & terminal / Specified resistance:
(F30) No. 4—(F17) No. 3 / 10Ω, max.
B2M0367A
5. CHECK GROUND CIRCUIT OF MAIN FAN MOTOR.
Measure resistance between main fan motor connector
and body.
Connector & terminal / Specified resistance:
(F17) No. 1—Body / 10Ω, max.
B2M0368A
6. CHECK MAIN FAN MOTOR.
1) Disconnect connector from main 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.
29
2-5DIAGNOSTICS
2. Radiator Main Fan
Page 470 of 3342
1. Intake Manifold
1. 2200 cc MODEL
B2M1031A
2
2-7COMPONENT PARTS
1. Intake Manifold
Page 471 of 3342

1Intake manifold gasket LH
2Intake manifold gasket RH
3Fuel injector pipe insulator
4Fuel injector pipe
5O-ring A
6O-ring B
7Fuel injector
8Insulator
9Fuel injector cap
10Plate
11Sealing
12Gasket
13Engine coolant hose B
14Air by-pass hose
15Idle air control solenoid valve
16Engine coolant hose A
17Nipple (AT model)
18Plug
19PCV valve
20Purge control solenoid valve
21Nipple
22BPT (Except 2200 cc MT model)
23BPT holder bracket (Except 2200 cc MT model)
24Back pressure hose (Except 2200 cc MT model)
25EGR vacuum hose A (Except 2200 cc MT model)
26EGR vacuum hose B (Except 2200 cc MT model)
27EGR valve (Except 2200 cc MT model)
28Gasket (Except 2200 cc MT model)
29EGR solenoid valve (Except 2200 cc MT model)
30EGR pipe (Except 2200 cc MT model)
31Pressure sensor
32Pressure sources switching solenoid valve
33Vacuum hose A
34Vacuum hose B
35Vacuum hose C
36Bracket (Except Canada spec. vehicles)
37Bracket (For Canada spec. vehicles)
38Intake manifold
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 3.4±0.5 (0.35±0.05, 2.5±0.4)
T2: 4.9±0.5 (0.5±0.05, 3.6±0.4)
T3: 6.4±0.5 (0.65±0.05, 4.7±0.4)
T4: 16±1.5 (1.6±0.15, 11.6±1.1)
T5: 19±1.5 (1.9±0.15, 13.7±1.1)
T6: 19±2 (1.9±0.2, 13.7±1.4)
T7: 23±3 (2.3±0.3, 16.6±2.2)
T8: 25±2 (2.5±0.2, 18.1±1.4)
T9: 34±2 (3.5±0.2, 25.3±1.4)
3
2-7COMPONENT PARTS
1. Intake Manifold
Page 472 of 3342

2. 2500 cc MODEL
B2M1198A
1Intake manifold gasket LH
2Intake manifold gasket RH
3Fuel injector pipe insulator
4Fuel injector pipe
5O-ring A
6O-ring B
7Fuel injector
8Insulator
9Fuel injector cap
10Plate
11Sealing
12Gasket
13Engine coolant hose B
14Air by-pass hose
15Idle air control solenoid valve
16Engine coolant hose A
17Nipple (AT model)
18Plug
19PCV valve
20Purge control solenoid valve
21Nipple
22BPT
23BPT holder bracket
24Back pressure hose
25EGR vacuum hose A
26EGR vacuum pipe
27EGR vacuum hose C
28EGR valve
29Gasket
30EGR vacuum hose B
31EGR solenoid valve
32EGR pipe
33Pressure sensor
34Pressure sources switching solenoid
valve
35Vacuum hose A
36Vacuum hose B
37Vacuum hose C
38Bracket
(Except Canada spec. vehicles)
39Bracket
(For Canada spec. vehicles)
40Collar
41Intake manifold
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 3.4±0.5 (0.35±0.05, 2.5±0.4)
T2: 4.9±0.5 (0.5±0.05, 3.6±0.4)
T3: 6.4±0.5 (0.65±0.05, 4.7±0.4)
T4: 16±1.5 (1.6±0.15, 11.6±1.1)
T5: 19±1.5 (1.9±0.15, 13.7±1.1)
T6: 19±2 (1.9±0.2, 13.7±1.4)
T7: 23±3 (2.3±0.3, 16.6±2.2)
T8: 25±2 (2.5±0.2, 18.1±1.4)
T9: 34±2 (3.5±0.2, 25.3±1.4)
4
2-7COMPONENT PARTS
1. Intake Manifold