Subaru IMPREZA GD 2007 Series Manual page 1484

asieps_tobira_IM_US.book 153 ページ ２０１２年１月１７日 火曜日 午後３時４８分
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
6 CHECK HARNESS BETWEEN ECM AND
FUEL PUMP CONTROL UNIT.
Measure the resistance between fuel pump
control unit and chassis ground.
Connector & terminal
(R122) No. 5 — Chassis ground:
(R122) No. 2 — Chassis ground:
7 CHECK POOR CONTACT.
Check poor contact of ECM and fuel pump con-
trol unit connector.
8 CHECK EXPERIENCE OF RUNNING OUT OF
FUEL.
Check
Is the resistance 1 MΩ or more? Go to step 7.
Is there poor contact of ECM
and fuel pump control unit con-
nector?
Has the vehicle experienced
running out of fuel?
EN(STI)(diag)-153
ENGINE (DIAGNOSTICS)
Yes No
Repair the ground
short circuit of har-
ness between
ECM and fuel
pump control unit.
Repair the poor Go to step 8.
contact of ECM
and fuel pump con-
trol unit connector.
Finish the diagno- Replace the fuel
sis. pump control unit.
<Ref. to
NOTE:
FU(H4DOTC)-54,
DTC may be re-
Fuel Pump Control
corded as a result
Unit.>
of fuel pump idling
while running out
of fuel.