Subaru LEGACY Service Manual page 49

Step
1 CHECK OPTION CODE.
2 CHECK OUTPUT SIGNAL FROM ECM.
1) Turn the ignition switch to ON.
2) Measure the voltage between ECM con-
nector and chassis ground.
Connector & terminal
(B134) No. 17 (+) — Chassis ground (
3 CHECK POOR CONTACT.
Check for poor connection by shaking or pull-
ing ECM connector and harness.
4 CHECK ECM CONNECTOR.
Check the connection of ECM connector.
5 CHECK HARNESS BETWEEN COMBINA-
TION METER AND ECM CONNECTOR.
1) Turn the ignition switch to OFF.
2) Remove the combination meter. <Ref. to
IDI-16, Combination Meter Assembly.>
3) Disconnect the connector from ECM and
combination meter.
4) Measure the resistance of harness
between ECM and combination meter connec-
tor.
Connector & terminal
(B134) No. 17 — (i10) No. 16:
6 CHECK POOR CONTACT.
Check poor contact in combination meter con-
nector.
7 CHECK HARNESS BETWEEN COMBINA-
TION METER AND IGNITION SWITCH CON-
NECTOR.
1) Turn the ignition switch to ON.
2) Measure the voltage between combination
meter connector and chassis ground.
Connector & terminal
(i10) No. 3 (+) — Chassis ground (
(i10) No. 4 (+) — Chassis ground (
Malfunction Indicator Light
Is the option code EC, EK or
K4?
Is the voltage less than 1 V?
−
):
Does the malfunction indicator
light illuminate?
Is the ECM connector correctly
connected?
Is the resistance less than 1
Ω?
Is there poor contact in combi-
nation meter connector?
Is the voltage more than 10 V? Replace the board
−
):
−
):
EN(H4SO 2.5)(diag)-47
Check
Go to step 2.
Go to step 5.
Repair the poor
contact in ECM
connector.
Replace the ECM.
<Ref. to FU(H4SO
2.5)-36, Engine
Control Module
(ECM).>
Go to step 6.
Repair the poor
contact in combi-
nation meter con-
nector.
of combination
meter. <Ref. to IDI-
16, Combination
Meter Assembly.>
ENGINE (DIAGNOSTICS)
Yes No
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.
Go to step 4.
Repair the con-
nection of ECM
connector.
Repair the har-
ness and connec-
tor.
NOTE:
In this case, repair
the following:
• Open circuit in
harness between
ECM and combi-
nation meter con-
nector
• Poor contact in
coupling connector
Go to step 7.
Check the follow-
ing and repair if
necessary.
NOTE:
• Blown out fuse
(No. 5)
• Open or short
circuit in harness
between fuse (No.
5) and battery ter-
minal
• Poor contact in
ignition switch con-
nector