CO(H4SO)-11
Radiator Fan System
COOLING
17
CHECK MAIN FAN MOTOR ASSEMBLY.
Connect the battery positive (+) terminal to ter-
minal No. 2 of the main fan motor assembly, and
the ground (–) terminal to terminal No. 1.
Does the radiator main fan
rotate?
Go to step
18
.
Replace the main
fan motor assem-
bly. <Ref. to
CO(H4SO)-23,
Radiator Main Fan
and Fan Motor.>
18
CHECK HARNESS BETWEEN SUB FAN RE-
LAY AND ECM.
1) Disconnect the connectors from ECM.
2) Measure the resistance between the sub
fan relay terminal and ECM connector.
Connector & terminal
(B136) No. 18 — (F27) No. 12:
Is the resistance less than 1
:
? Go to step
19
.
Repair the open
circuit of harness
between sub fan
relay terminal and
ECM.
19
CHECK POOR CONTACT.
Check for poor contact of ECM connector.
Is there poor contact of ECM
connector?
Repair the poor
contact of ECM
connector.
Check the DTC.
Repair the trouble
cause. <Ref. to
EN(H4SO)(diag)-
43, Read Diagnos-
tic Trouble Code
(DTC).>
20
CHECK MAIN FAN RELAY 1.
1) Turn the ignition switch to OFF.
2) Remove main fan relay 1 from the main fuse
box.
3) Measure the resistance at the main fan relay
1 switch.
Is the resistance 1 M
:
or
more?
Go to step
21
.
Replace the main
fan relay 1. <Ref. to
AC-39, Relay and
Fuse.>
21
CHECK MAIN FAN RELAY 1.
1) Connect the main fan relay 1 coil side termi-
nal to the battery.
2) Measure the resistance between terminals
at main fan relay 1 switch side.
Is the resistance less than 1
:
? Go to step
22
.
Replace the main
fan relay 1. <Ref. to
AC-39, Relay and
Fuse.>
22
CHECK HARNESS BETWEEN MAIN FAN
RELAY 1 AND MAIN FAN MOTOR ASSEM-
BLY CONNECTOR.
1) Disconnect the connector from the main fan
motor assembly.
2) Measure the resistance of harness between
the main fan relay 1 terminal and main fan
motor assembly connector.
Connector & terminal
(F17) No. 2 — (F36) No. 6:
Is the resistance less than 1
:
? Go to step
23
.
Repair the open
circuit of harness
between the main
fan relay 1 terminal
and main fan motor
assembly connec-
tor.
23
CHECK HARNESS BETWEEN MAIN FAN
RELAY 1 AND ECM.
1) Disconnect the connectors from ECM.
2) Measure the resistance between the main
fan relay 1 terminal and ECM connector.
Connector & terminal
(B136) No. 29 — (B143) No. 7:
Is the resistance less than 1
:
? Go to step
24
.
Repair the open
circuit of the har-
ness between
main fan relay 1
terminal and ECM.
24
CHECK HARNESS BETWEEN MAIN FAN
RELAY 2 AND ECM.
Measure the resistance between the main fan
relay 2 terminal and ECM connector.
Connector & terminal
(B136) No. 29 — (F27) No. 22:
Is the resistance less than 1
:
? Go to step
25
.
Repair the open
circuit of the har-
ness between
main fan relay 2
terminal and ECM.
25
CHECK FUSE.
1) Turn the ignition switch to OFF.
2) Remove the fuse No. 2 and 26.
3) Check the condition of fuse.
Is the fuse blown out?
Replace the fuse.
Go to step
26
.
Step
Check
Yes
No
Summary of Contents for 2009 IMPREZA
Page 18: ...PC 4 Precaution PRECAUTION...
Page 21: ...NT 4 Note NOTE Lift Rigid rack A Attachment NT 00241 A A Attachment NT 00242 A...
Page 23: ...NT 6 Note NOTE A Front B Rear 1 Front crossmember 2 Rear differential 1 2 A B NT 00210...
Page 66: ...PI 22 Pre delivery Inspection PRE DELIVERY INSPECTION...
Page 112: ...PM 48 A C Filter PERIODIC MAINTENANCE SERVICES...
Page 219: ...IN H4SO 10 Resonator Chamber INTAKE INDUCTION...
Page 324: ...ME H4SO 106 Engine Noise MECHANICAL...
Page 388: ...SP H4SO 6 Accelerator Pedal SPEED CONTROL SYSTEMS...
Page 395: ...IG H4SO 8 Spark Plug Cord IGNITION...
Page 418: ...SC H4SO 24 Battery STARTING CHARGING SYSTEMS...
Page 725: ...EN H4SO diag 308 General Diagnostic Table ENGINE DIAGNOSTICS...
Page 926: ...GD H4SO 202 Diagnostic Trouble Code DTC Detecting Criteria GENERAL DESCRIPTION...
Page 1181: ...EX H4DOTC 16 Muffler EXHAUST...
Page 1212: ...CO H4DOTC 32 Engine Cooling System Trouble in General COOLING...
Page 1221: ...IG H4DOTC 8 Ignition Coil IGNITION...
Page 1818: ...GD H4DOTC 230 Diagnostic Trouble Code DTC Detecting Criteria GENERAL DESCRIPTION...
Page 2154: ...5MT 82 General Diagnostic Table MANUAL TRANSMISSION AND DIFFERENTIAL...
Page 2227: ...RS 20 General Diagnostic Table REAR SUSPENSION...
Page 2364: ...DS 36 General Diagnostic Table DRIVE SHAFT SYSTEM...
Page 2615: ...BR 48 General Diagnostic Table BRAKE...
Page 2624: ...PB 10 General Diagnostic Table PARKING BRAKE...
Page 2681: ...PS 58 General Diagnostic Table POWER ASSISTED SYSTEM POWER STEERING...
Page 2730: ...AC 50 General Diagnostic Table HVAC SYSTEM HEATER VENTILATOR AND A C...
Page 2961: ...SB 22 Rear Seat Belt SEAT BELT SYSTEM...
Page 3035: ...COM 6 Horn Switch COMMUNICATION SYSTEM...
Page 3070: ...GW 36 Wiper Deicer System GLASS WINDOWS MIRRORS...
Page 3092: ...IDI 22 Clock INSTRUMENTATION DRIVER INFO...
Page 3158: ...SL 54 Immobilizer Antenna SECURITY AND LOCKS...
Page 3167: ...SR 10 Sunshade SUNROOF T TOP CONVERTIBLE TOP SUNROOF...
Page 3240: ...EI 74 Ornament EXTERIOR INTERIOR TRIM...
Page 3286: ...CC 12 Neutral Position Switch CRUISE CONTROL SYSTEM...
Page 3311: ...CC diag 26 Diagnostic Procedure with Cancel Code CRUISE CONTROL SYSTEM DIAGNOSTICS...
Page 3421: ...LAN diag 88 General Diagnostic Table LAN SYSTEM DIAGNOSTICS...
Page 3486: ...WI 67 Remote Engine Start System WIRING SYSTEM...