Subaru Impreza 2004 - Page 360

EN(H4SO)(diag)-54
ENGINE (DIAGNOSTICS)
Malfunction Indicator Light
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:
Step Check Yes No
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.
Dose the malfunction indicator
light illuminate?
Repair short circuit
in harness
between combina-
tion meter and
ECM connector.
Replace the ECM.
<Ref. to
FU(H4SO)-47,
Engine Control
Module (ECM).>
EN-01417
1
B72
B134
SBF-4
4
28
ECM
i12
1 2 3 4 5 6
87 9 10 11 12 13 14
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
B72
34
12
SBF-1
No.13
i2
3412 89 10 11
12 13 14 15 16 17 18 19 20 21 22 23 24
567
i2
21
9
32
1234 56
10 11 12 13 14 15
7
16
23 30
19 20
22 26 27 28 29
8
17
24 31
18
25
B37
i2
i1
i2
B37
14
LHD
LHD
RHD
RHD
B36
E
LHD: 14
*
RHD: 31
*
i1
3412 89 10 11
12 13 14 15 16 17 18 19 20 21 22 23 24
5
6
7
: LHD
: RHD
i11
1234
5
6789
10
A:
C:
i12
i11
C7
A6
COMBINATION
METER
IGNITION
SWITCH
BATTERY
13