Subaru Impreza 2003 Service Manual page 465

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 the engine runs, DTC is not shown on Subaru se-
lect monitor or OBD-II general scan tool display.
• WIRING DIAGRAM:
COMBINATION
METER
A:
i12
C: i11
LHD
i1
B36
LHD
B72
1 2
1 2
12 13 14 15 16 17 18 19 20 21 22 23 24
3 4
i2
: LHD
1 2 3 4 5 6 7
12 13 14 15 16 17 18 19 20 21 22 23 24
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
B37
i2
RHD
i2
B37
RHD
ECM
B134
i1
3 4 5 6 7 8 9 10 11
i11
8 9 10 11
1 2 3 4 5 6 7 8 9 10
EN(H4SO)-53
IGNITION
B72
SWITCH
SBF-4
4 1
LHD: 14
*
RHD: 31
B134
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 32 33 34 35
i12
1 2 3 4 5 6
7 8 9 10 11 12 13 14
Check
Dose the malfunction indicator
light illuminate?
ENGINE (DIAGNOSTICS)
BATTERY
SBF-1
i2
: RHD
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 32
Yes
Repair short circuit Replace the ECM.
in harness <Ref. to
between combina- FU(H4SO)-48,
tion meter and Engine Control
ECM connector. Module (ECM).>
E
EN-01417
No