Subaru Legacy 2004 Service Manual page 989

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK OPTION CODE.
2 CHECK INPUT SIGNAL FROM ECM.
1) Turn the ignition switch to OFF.
2) Measure the voltage between ECM and
chassis ground.
Connector & terminal
(B135) No. 19 (+) — Chassis ground (
3 CHECK HARNESS BETWEEN ECM AND
MAIN FUSE BOX CONNECTOR.
1) Disconnect the connector from ECM.
2) Measure the resistance of harness
between ECM and chassis ground.
Connector & terminal
(B135) No. 19 — Chassis ground:
4 CHECK FUSE No. 13.
Check
Is the option code EC, EK or
K4?
Is the voltage more than 10 V? Repair the poor
"
):
Is the resistance less than 10
!?
Is the fuse blown out?
EN(H4SO 2.5)(diag)-230
Yes
Go to step 2. Refer to EN(H4SO
2.0) section. <Ref.
to EN(H4SO
2.0)(diag)-66, List
of Diagnostic Trou-
ble Code (DTC).>
NOTE:
Fuel injection sys-
tem for KA and KS
model is the same
as 2.0 L model.
Go to step 3.
contact in ECM
connector.
Repair the ground Go to step 4.
short circuit in har-
ness between
ECM connector
and battery termi-
nal.
Replace the fuse. Repair the har-
ness and connec-
tor.
NOTE:
In this case, repair
the following:
• Open circuit in
harness between
ECM and battery
• Poor contact in
ECM connector
• Poor contact in
battery terminal
No