CO(H4DOTC)-12
Radiator Fan System
COOLING
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(H4DOTC)(diag
)-42, Read Diag-
nostic 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 of terminal in main
fan relay 1 switch.
Is the resistance 1 M
:
or
more?
Go to step
21
.
Replace the main
fan relay 1.
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
of main fan relay 1 switch.
Is the resistance less than 1
:
? Go to step
22
.
Replace the main
fan relay 1.
22
CHECK HARNESS BETWEEN MAIN FAN
RELAY 1 AND MAIN FAN MOTOR CONNEC-
TOR.
1) Disconnect the connector from the main fan
motor.
2) Measure the resistance of the harness
between main fan relay 1 terminal and main fan
motor connector.
Connector & terminal
(F17) No. 1 — (F36) No. 6:
Is the resistance less than 1
:
? Go to step
23
.
Repair the open
circuit of the har-
ness between
main fan relay 1
terminal and main
fan motor connec-
tor.
23
CHECK HARNESS BETWEEN MAIN FAN
RELAY 1 AND ECM.
1) Disconnect the connectors from ECM.
2) Measure the resistance between 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 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
.
26
CHECK POOR CONTACT.
Check for poor contact of ECM connector.
Is there poor contact of ECM
connector?
Repair the poor
contact of ECM
connector.
Repair the power
supply circuit to the
main fuse box.
27
CHECK OPERATION OF RADIATOR FAN.
If the both fans do not rotate at high speed in the
condition of step 2, check whether the radiator
sub fan is rotating.
Does the radiator sub fan
rotate?
Go to step
20
.
Go to step
28
.
Step
Check
Yes
No
Содержание 2009 IMPREZA
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Страница 23: ...NT 6 Note NOTE A Front B Rear 1 Front crossmember 2 Rear differential 1 2 A B NT 00210...
Страница 25: ...NT 8 Note NOTE TIE DOWN HOOK EYE BOLT A Front tie down hook B Rear tie down hook C Eye bolt NT 00213 A B C...
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Страница 2730: ...AC 50 General Diagnostic Table HVAC SYSTEM HEATER VENTILATOR AND A C...
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