2009 SUBARU TRIBECA Service Workshop Manual

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Page 1121 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual CO(H6DO)-2
General Description
COOLING
1. General Description
A: SPECIFICATION
•Outside temperature: Less than 35°C (95°F)
Cooling systemElectric fan + Forced engine coolant circula-
tion system
T

Page 1122 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual CO(H6DO)-3
General Description
COOLING
•Outside temperature: 35°C (95°F) or more.
Ve h i c l e s p e e d A / C c o m p r e s s o r l o a d
Engine coolant temperature
Increase: less than
95�

Page 1123 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual CO(H6DO)-4
General Description
COOLING
B: COMPONENT
1. WATER PUMP
(1) Water pump ASSY (4) GasketTightening torque: N·m (kgf-m, ft-lb)
(2) O-ring (5) Thermostat coverT: 6.4 (0.65, 4.7)
(3) Thermostat

Page 1124 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual CO(H6DO)-5
General Description
COOLING
2. RADIATOR AND RADIATOR FAN
(1) Radiator lower cushion (11) Radiator hose B (20) Over flow hose
(2) Engine coolant drain cock (12) Radiator hose D (21) Engine c

Page 1125 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual CO(H6DO)-6
General Description
COOLING
C: CAUTION
•Wear work clothing, including a cap, protective goggles and protective shoes during operation.
•Remove contamination including dirt and corrosion

Page 1126 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual CO(H6DO)-7
Radiator Fan System
COOLING
2. Radiator Fan System
A: WIRING DIAGRAM
CO-02209
RADIATOR FANCONTROL UNIT
132
B136
ECM
16
F109
F106
7
B360
2918
F106
123
B7
E
SBF-6MAIN SBF
NO.2
NO.26
B143B:
F3

Page 1127 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual CO(H6DO)-8
Radiator Fan System
COOLING
B: RADIATOR FAN CONTROL OUTPUT WAVEFORM
C: INSPECTION
DETECTING CONDITION:
•Engine coolant temperature is more than 95°C (203°F).
•A/C switch is turned OFF

Page 1128 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual CO(H6DO)-9
Radiator Fan System
COOLING
4CHECK POWER SUPPLY FOR RADIATOR
FAN CONTROL UNIT.
1) Turn the ignition switch to OFF.
2) Connect the connector to ECM.
3) Disconnect the connector from radiato

CO(H6DO)-9
Radiator Fan System
COOLING
4CHECK POWER SUPPLY FOR RADIATOR
FAN CONTROL UNIT.
1) Turn the ignition switch to OFF.
2) Connect the connector to ECM.
3) Disconnect the connector from radiator fan
control unit.
4) Turn the ignition switch ON.
5) Measure the voltage between radiator fan
control unit terminal and chassis ground.
Connector & terminal
(F106) No. 3 (+) — Chassis ground (–):
Is the voltage more than 10 V? Go to step 5.Repair the power
supply line.
5CHECK HARNESS BETWEEN ECM AND RA-
DIATOR FAN CONTROL UNIT.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from the ECM.
3) Measure the resistance between radiator
fan control unit and ECM connector.
Connector & terminal
(B136) No. 18 — (F106) No. 2:
Is the resistance less than 1
Ω?
Go to step 6.Repair the open
circuit of harness
between ECM and
radiator fan con-
trol unit.
6CHECK RADIATOR FAN CONTROL UNIT
AND GROUND CIRCUIT.
1) Connect the connector to ECM and radiator
fan control unit.
2) Measure the resistance between radiator
fan control unit connector and chassis ground.
Connector & terminal
(F106) No. 1 — Chassis ground:
Is the resistance less than 5
Ω?
Go to step 7.Repair the open
circuit of harness
between radiator
fan control unit
connector and
chassis ground.
7CHECK MAIN FAN MOTOR.
1) Disconnect the connector from radiator fan
control unit.
2) Connect the battery positive (+) terminal to
terminal No. 1 of the main fan motor, and the
ground (–) terminal to terminal No. 2.
Does the main fan motor
rotate?
Go to step 8.Replace the main
fan motor.
8CHECK SUB FAN MOTOR.
1) Disconnect the connector from radiator fan
control unit.
2) Connect the battery positive (+) terminal to
terminal No. 1 of the sub fan motor, and the
ground (–) terminal to terminal No. 2.
Does the sub fan motor rotate? Go to step 9.Replace the sub
fan motor.
9CHECK OUTPUT SIGNAL FROM ECM.
1) Turn the ignition switch to OFF.
2) Connect the test mode connector.
3) Turn the ignition switch ON.
4) Check the output waveform using oscillo-
scope. CONTROL OUTPUT WAVEFORM, Radiator
Fa n S y st e m. >
Connector & terminal
(B134) No. 18 (+) — Chassis ground (–):
Is waveform being output? Replace the radia-
tor fan control unit.
CO(H6DO)-29,
Radiator Fan Con-
trol Unit.>
Replace the ECM.
FU(H6DO)-32,
Engine Control
Module (ECM).>
Step Check Yes No

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