(B380) No - Subaru IMPREZA GD 2007 Series Manual

asieps_tobira_IM_US.book 9 ページ ２０１２年１月１７日 火曜日 午後３時４８分
Step
15 CHECK HARNESS BETWEEN MAIN FAN
RELAY 1 AND ECM.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from the ECM.
3) Measure the resistance of harness between
main fan relay 1 connector and ECM connector.
Connector & terminal
(F27) No. 32 — (B136) No. 18:
16 CHECK POOR CONTACT.
Repair the open circuit of harness between
main fan relay and ECM.
17 CHECK POWER SUPPLY TO MAIN FAN MO-
TOR.
CAUTION:
Be careful not to overheat the engine during
repair.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from the main fan
motor.
3) Start and warm up the engine until engine
coolant temperature raises to 96°C (205°F) or
above.
4) Turn on the A/C switch.
5) Measure the voltage while the A/C com-
pressor is operating.
6) Measure the voltage between main fan
motor connector and chassis ground.
Connector & terminal
(F17) No. 2 (+) — Chassis ground (–):
18 CHECK POOR CONTACT.
Check poor contact of the main fan motor con-
nector.
19 CHECK MAIN FAN MOTOR.
Connect the battery positive (+) terminal to ter-
minal No. 2, and the ground (–) terminal to ter-
minal No. 3 or No. 4 of the main fan motor
connector.
20 CHECK POWER SUPPLY TO MAIN FAN RE-
LAY 2.
1) Turn the ignition switch to OFF.
2) Remove the main fan relay 2 from A/C relay
holder.
3) Measure the voltage between main fan relay
2 terminal and chassis ground.
Connector & terminal
(F27) No. 28 (+) — Chassis ground (–):
21 CHECK POWER SUPPLY TO MAIN FAN RE-
LAY 2.
1) Turn the ignition switch to ON.
2) Measure the voltage between main fan relay
2 terminal and chassis ground.
Connector & terminal
(F27) No. 25 (+) — Chassis ground (–):
Radiator Main Fan System
Check
Is the resistance less than 1 Ω? Go to step 16.
Is there poor contact in connec-
tor between main fan motor and
ECM?
Is the voltage 10 V or more?
Is there poor contact in the
main fan motor connector?
Does the main fan rotate?
Is the voltage 10 V or more?
Is the voltage 10 V or more?
CO(H4SO)-9
COOLING
Yes No
Repair the open
circuit of harness
between main fan
relay 1 and ECM.
Repair the poor Check the DTC.
contact of connec- Repair the trouble
tor. cause. <Ref. to
EN(H4SO)(diag)-
37, Read Diagnos-
tic Trouble Code
(DTC).>
Go to step 18. Go to step 20.
Repair the poor Go to step 19.
contact of main fan
motor connector.
Repair the poor Replace the main
contact of main fan fan motor with a
motor connector. new part.
Go to step 21. Go to step 22.
Go to step 25. Go to step 24.