ENGINE MALFUNCTION INDICATOR LAMP (MIL)
Engine (Diagnostics)
15. Engine Malfunction
Indicator Lamp (MIL)
S058653
A: PROCEDURE
S058653E45
1. Activation of check engine malfunction indicator lamp (MIL). <Ref. to EN(SOHC)-49, ACTIVATION OF CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL), Engine Malfunction Indicator Lamp (MIL).>
2. Check engine malfunction indicator lamp (MIL) does not come on. <Ref. to EN(SOHC)-50, CHECK ENGINE MALFUNC­TION INDICATOR LAMP (MIL) DOES NOT COME ON., Engine Malfunction Indicator Lamp (MIL).>
3. Check engine malfunction indicator lamp (MIL) does not go off. <Ref. to EN(SOHC)-53, CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) DOES NOT GO OFF., Engine Malfunction Indicator Lamp (MIL).>
4. Check engine malfunction indicator lamp (MIL) does not blink at a cycle of 3 Hz. <Ref. to EN(SOHC)-54, CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) DOES NOT BLINK AT A CYCLE OF 3 HZ., Engine Malfunction Indicator Lamp (MIL).>
5. Check engine malfunction indicator lamp (MIL) remains blinking at a cycle of 3 Hz. <Ref. to EN(SOHC)-56, CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) REMAINS BLINKING AT A CYCLE OF 3 HZ., Engine Malfunction Indicator Lamp (MIL).>
EN(SOHC)-48
ENGINE MALFUNCTION INDICATOR LAMP (MIL)
Engine (Diagnostics)
B: ACTIVATION OF CHECK ENGINE MALFUNCTION INDICATOR LAMP
У MI L ) f S058653E89
1) When ignition switch is turned to ON (engine off), the CHECK ENGINE malfunction indicator lamp (MIL) in the combination meter illuminates.
NOTE:
If the MIL does not illuminate, perform diagnostics of the CHECK ENGINE light circuit or the combi­nation meter circuit. <Ref. to EN(SOHC)-50, CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) DOES NOT COME ON., Engine Mal­function Indicator Lamp (MIL).>
3) If the diagnosis system senses a misfire which could damage the catalyzer, the MIL will blink at a cycle of 1 Hz.
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4) When ignition switch is turned to ON (engine off) or to "START" with the test mode connector connected, the MIL blinks at a cycle of 3 Hz.
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(A) Malfunction indicator lamp (MIL)
2) After starting the engine, the MIL goes out. If it does not, either the engine or the emission control system is malfunctioning.
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EN(SOHC)-49
Engine (Diagnostics)
ENGINE MALFUNCTION INDICATOR LAMP (MIL)
C: CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) DOES NOT
COME ON.
S058653E90
-  DIAGNOSIS:
-  The CHECK ENGINE malfunction indicator lamp (MIL) circuit is open or shorted.
-  TROUBLE SYMPTOM:
-  When ignition switch is turned ON (engine OFF), MIL does not come on.
-  WIRING DIAGRAM:
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No.
Step
Check
Yes
No
1
CHECK OUTPUT SIGNAL FROM ECM.
1) Turn ignition switch to ON. 2) Measure voltage between ECM connector and chassis ground. Connector & terminal (B134) No. 11 (+) - Chassis ground
Is the voltage less than 1 V?
Go to step 4.
Go to step 2.
EN(SOHC)-50
ENGINE MALFUNCTION INDICATOR LAMP (MIL)
Engine (Diagnostics)
No.
Step
Check
Yes
No
2
CHECK POOR CONTACT.
Does the MIL come on
Repair poor con-
Go to step 3.
when shaking or pulling
tact in ECM con-
ECM connector and har-
nector.
ness?
3
CHECK ECM CONNECTOR.
Is ECM connector correctly
Replace ECM.
Repair connection
connected?
<Ref. to
of ECM connec-
FU(SOHC)-49,
tor.
Engine Control
Module.>
4
CHECK HARNESS BETWEEN COMBINA-
Is resistance less than 1
Go to step 5.
Repair harness
TION METER AND ECM CONNECTOR.
Q?
and connector.
1) Turn ignition switch to OFF.
NOTE:
2) Remove combination meter. <Ref. to IDI-
In this case,
15, Combination Meter Assembly.>
repair the follow-
3) Disconnect connector from ECM and com-
ing:
bination meter.
- Open circuit in
4) Measure resistance of harness between
harness between
ECM and combination meter connector.
ECM and combi-
Connector & terminal
nation meter con-
(B134) No. 11 - (i10) No. 9:
nector
- Poor contact in
coupling connec-
tor (i2)
5
CHECK POOR CONTACT.
Is there poor contact in
Repair poor con-
Go to step 6.
Check poor contact in combination meter connec-
combination meter connec-
tact in combina-
nector.
tor?
tion meter con-
nector.
6
CHECK HARNESS BETWEEN COMBINA-
Is voltage more than 10 V?
Go to step 7.
Check the follow-
TION METER AND IGNITION SWITCH CON-
ing and repair if
NECTOR.
necessary.
1) Turn ignition switch to ON.
NOTE:
2) Measure voltage between combination
- Broken down
meter connector and chassis ground.
ignition relay.
Connector & terminal
- Blown out fuse
(i10) No. 2 (+) - Chassis ground (-):
(No. 5).
- If replaced fuse
(No. 5) blows
easily, check the
harness 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
EN(SOHC)-51
Engine (Diagnostics)
ENGINE MALFUNCTION INDICATOR LAMP (MIL)
No.
Step
Check
Yes
No
7
CHECK LAMP BULB.
Remove engine malfunction indicator lamp bulb.
Is lamp bulb condition OK?
Repair combina­tion meter con­nector.
Replace lamp bulb.
EN(SOHC)-52
ENGINE MALFUNCTION INDICATOR LAMP (MIL)
Engine (Diagnostics)
D: CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) DOES NOT GO
OFF.
S058653E91
-  DIAGNOSIS:
-  The CHECK ENGINE malfunction indicator lamp (MIL) circuit is shorted.
-  TROUBLE SYMPTOM:
-  Although MIL comes on when engine runs, trouble code is not shown on Subaru select monitor or OBD-II general scan tool display.
-  WIRING DIAGRAM:
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No.
Step
Check
Yes
No
1
CHECK HARNESS BETWEEN COMBINA­TION METER AND ECM CONNECTOR.
1) Turn ignition switch to OFF.
2)  Disconnect connector from ECM.
3) Turn ignition switch to ON.
Does the MIL come on?
Repair short cir­cuit in harness between combina­tion meter and ECM connector.
Replace ECM. <Ref. to FU(SOHC)-49, Engine Control Module.>
EN(SOHC)-53
Engine (Diagnostics)
ENGINE MALFUNCTION INDICATOR LAMP (MIL)
E: CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) DOES NOT
BLINK AT A CYCLE OF 3 Hz.
S058653E92
-  DIAGNOSIS:
-  The CHECK ENGINE malfunction indicator lamp (MIL) circuit is open or shorted.
-  Test mode connector circuit is in open.
-  TROUBLE SYMPTOM:
-  When inspection mode, MIL does not blink at a cycle of 3 Hz.
-  WIRING DIAGRAM:
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EN(SOHC)-54
ENGINE MALFUNCTION INDICATOR LAMP (MIL)
Engine (Diagnostics)
No.
Step
Check
Yes
No
1
CHECK STATUS OF CHECK ENGINE MAL­FUNCTION INDICATOR LAMP (MIL).
1) Turn ignition switch to OFF. 2) Disconnect test mode connector. 3) Turn ignition switch to ON. (engine OFF)
Does the MIL come on?
Go to step 2.
Repair the MIL circuit. <Ref. to EN(SOHC)-50, CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) DOES NOT COME ON., Engine Malfunc­tion Indicator Lamp (MIL).>
2
CHECK HARNESS BETWEEN COMBINA­TION METER AND ECM CONNECTOR.
1) Turn ignition switch to OFF. 2) Disconnect connector from ECM. 3) Turn ignition switch to ON.
Does the MIL come on?
Repair ground short circuit in harness between combination meter and ECM connec­tor.
Go to step 3.
3
CHECK HARNESS BETWEEN TEST MODE CONNECTOR AND CHASSIS GROUND.
1) Turn ignition switch to OFF. 2) Disconnect connector from ECM. 3) Measure resistance of harness between test mode connector and chassis ground. Connector & terminal (B76) No. 1 - Chassis ground:
Is resistance less than 1 Q?
Go to step 4.
Repair harness and connector. NOTE: In this case, repair the follow­ing: - Open circuit in harness between test mode con­nector and chas­sis ground
4
CHECK POOR CONTACT.
Check poor contact in ECM connector.
Is there poor contact in ECM connector?
Repair poor con­tact in ECM con­nector.
Go to step 5.
5
CHECK HARNESS BETWEEN ECM AND TEST MODE CONNECTOR.
1) Connect test mode connector. 2) Measure resistance of harness between ECM and chassis ground. Connector & terminal (B135) No. 14 - Chassis ground:
Is resistance less than 1 Q?
Go to step 6.
Repair open cir­cuit in harness between ECM and test mode connector.
6
CHECK POOR CONTACT.
Check poor contact in ECM connector.
Is there poor contact in ECM connector?
Repair poor con­tact in ECM con­nector.
Replace ECM. <Ref. to FU(SOHC)-49, Engine Control Module.>
EN(SOHC)-55
Engine (Diagnostics)
ENGINE MALFUNCTION INDICATOR LAMP (MIL)
F: CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) REMAINS
BLINKING AT A CYCLE OF 3 Hz.
S058653E93
-  DIAGNOSIS:
-  Test mode connector circuit is shorted.
-  TROUBLE SYMPTOM:
-  MIL blinks at a cycle of 3 Hz when ignition switch is turned to ON.
-  WIRING DIAGRAM:
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No.
Step
Check
Yes
No
1
CHECK TEST MODE CONNECTOR.
Does MIL flash on and off?
Go to step 2.
System is in good
1) Disconnect test mode connector.
order.
2) Turn ignition switch to ON.
NOTE:
MIL blinks at a
cycle of 3 Hz
when test mode
connector is con-
nected.
EN(SOHC)-56
ENGINE MALFUNCTION INDICATOR LAMP (MIL)
Engine (Diagnostics)
No.
Step
Check
Yes
No
2
CHECK HARNESS BETWEEN ECM CON-
Is resistance less than 5
Repair short cir-
Replace ECM.
NECTOR AND ENGINE GROUNDING TER-
Q?
cuit in harness
<Ref. to
MINAL.
between ECM
FU(SOHC)-49,
1) Turn ignition switch to OFF.
and test mode
Engine Control
2) Disconnect connector from ECM.
connector.
Module.>
3) Measure resistance of harness between
ECM connector and chassis ground.
Connector & terminal
(B135) No. 14 - Chassis ground:
EN(SOHC)-57
ENGINE MALFUNCTION INDICATOR LAMP (MIL)
Engine (Diagnostics) MEMO:
EN(SOHC)-58