Subaru IMPREZA 2004 Service Manual page 359

Step
3 CHECK ECM CONNECTOR.
Check the ECM connector connection.
4 CHECK HARNESS BETWEEN COMBINA-
TION METER AND ECM CONNECTOR.
1)Turn the ignition switch to OFF.
2)Remove the combination meter. <Ref. to IDI-
11, Combination Meter Assembly.>
3)Disconnect the connector from ECM and
combination meter.
4)Measure the resistance of harness between
ECM and combination meter connector.
Connector & terminal
(B134) No. 28 — (i12) No. 6:
5 CHECK POOR CONTACT.
Check poor contact in combination meter con-
nector.
6 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
(i11) No. 7 (+) — Chassis ground ( − − − − ):
Malfunction Indicator Light
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 com-
EN(H4SO)(diag)-53
Check
Replace the ECM.
<Ref. to
FU(H4SO)-47,
Engine Control
Module (ECM).>
Go to step 5.
Repair poor con-
tact in combination
meter connector.
bination meter cir-
cuit board. <Ref.
to IDI-11, Combi-
nation Meter
Assembly.>
ENGINE (DIAGNOSTICS)
Yes No
Repair connection
of ECM connector.
Repair harness
and connector.
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 6.
Check the follow-
ing and repair if
necessary.
NOTE:
• Blown out fuse
(No. 13).
• Open or short
circuit in harness
between fuse (No.
13) and battery
terminal
• Poor contact in
ignition switch con-
nector