Subaru Impreza 2003 Service Manual page 1231

D: MALFUNCTION INDICATOR LIGHT DOES NOT GO OFF.
• DIAGNOSIS:
• The malfunction indicator light circuit is shorted.
• TROUBLE SYMPTOM:
• Although malfunction indicator light comes on when engine runs, but DTC is not shown on Subaru Se-
lect Monitor or OBD-II general scan tool display.
• WIRING DIAGRAM:
C7
A6
COMBINATION
METER
A : i12
C :
i11
B72
1 2
3 4
i2
1 2 3 4 5
11 12 13 14 15 16 17 18 19 20 21 22
Step
1 CHECK HARNESS BETWEEN COMBINA-
TION METER AND ECM CONNECTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ECM.
3)Turn the ignition switch to ON.
MALFUNCTION INDICATOR LIGHT
No.13
LHD RHD
B37
B37 B36
i2
i2 i1
LHD RHD
i1
* LHD : 14
RHD : 13
B36
B84 ECM
i12
1 2 3 4 5 6
7 8 9 10 11 12 13 14
1 2 3 4
12 13 14 15 16 17 18 19 20 21 22 23 24
6 7 8 9 10
EN(H4DOTC)-55
IGNITION
B72
SWITCH
SBF-4
4 1
i11
1 2 3 4 5 6 7 8 9 10
i1
5 6 7 8 9 10 11
Check
Does the malfunction indicator
light come on?
ENGINE (DIAGNOSTICS)
BATTERY
SBF-1
B84
1 2 3
4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21
22 23 24 25 26 27 28 29 30 31
Yes
Repair the short Replace the ECM.
circuit in harness <Ref. to
between combina- FU(H4DOTC)-49,
tion meter and Engine Control
ECM connector. Module (ECM).>
E
EN-01290
No