Subaru 2002 IMPREZA Service Manual page 488

ENGINE MALFUNCTION INDICATOR LAMP (MIL)
ENGINE (DIAGNOSTICS)
D: CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) DOES NOT GO
OFF.
• DIAGNOSIS:
• The CHECK ENGINE malfunction indicator lamp (MIL) circuit is shorted.
• TROUBLE SYMPTOM:
• Although MIL comes on when engine runs, but trouble code is not shown on Subaru Select Monitor or
OBD-II general scan tool display.
• WIRING DIAGRAM:
LHD
B36
i1
LHD
A7
C6
COMBINATION
METER
A: i10
C: i12
B72
1 2 3 4 5 6
1 2
12 13 14 15 16 17 18 19 20 21 22 23 24
3 4
LHD:
i2
1 2 3 4 5 6 7 8 9 10 11
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.
IGNITION
B72
SWITCH
No.13
4
RHD
AT MT
B38 B36
i3 i1
AT MT
RHD
i2
1 LHD :16
RHD :13
B37
ECM
B134
B36
1 2
7 8 9 10 11
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
24 25
RHD:
i2
1 2 3 4 5 6
10 11 12 13 14 15 16 17 18
22 23 24 25 26 27 28 29 30
SBF-4
1
B134
3 4 5 6 7 8
26 27 28 29 30 31 32 33 34 35
C:
i12
7 8 9
1 2 3 4 5 6
19 20 21
7 8 9 10 11 12 13 14
31 32
Check
Does the MIL come on?
EN-56
BATTERY
SBF-1
A:
i1
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6
7 8 9 10 11 12 13 14
i3
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20 21 22
Yes
Repair the short Replace the ECM.
circuit in harness <Ref. to FU-51,
between combina- Engine Control
tion meter and Module.>
ECM connector.
i10
EN1395
No