Subaru 2002 IMPREZA Service Manual page 1211

ENGINE MALFUNCTION INDICATOR LAMP (MIL)
Step
3 CHECK ECM CONNECTOR.
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-
15, 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
(B137) No. 15 — (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
(i10) No. 7 (+) — Chassis ground ( − − − − ):
7 CHECK LAMP BULB.
Remove the engine malfunction indicator lamp
bulb.
Check
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? Go to step 7.
Is the lamp bulb condition OK? Repair the combi-
EN(TURBO)-51
ENGINE (DIAGNOSTICS)
Yes
Replace the ECM. Repair the con-
<Ref. to nection of ECM
FU(TURBO)-49, connector.
Engine Control
Module.>
Go to step 5. 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
Repair the poor Go to step 6.
contact in combi-
nation meter con-
nector.
Check the follow-
ing and repair if
necessary.
NOTE:
• Broken down
ignition relay
• Blown out fuse
(No. 5)
• If replaced fuse
(No. 5) blows eas-
ily, check the har-
ness for short
circuit of harness
between fuse (No.
5) and ignition
relay connector.
• Open or short
circuit in harness
between fuse (No.
5) and battery ter-
minal
• Open circuit in
harness between
fuse (No. 5) and
ignition relay con-
nector
• Poor contact in
ignition relay con-
nector
• Poor contact in
ignition switch
connector
Replace the lamp
nation meter con- bulb.
nector.
No