Subaru 2009 IMPREZA Service Manual page 1284

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 the Subaru Select
Monitor display.
WIRING DIAGRAM:
2
38
COMBINATION
METER
i10
i10
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 36 37 38 39 40
Step
1 CHECK HARNESS BETWEEN ECM AND
COMBINATION METER CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM.
3) Turn the ignition switch to ON.
Malfunction Indicator Light
IGNITION
B72
SWITCH
No.5
1
i1
B36
ECM
B136
B72
1 2 3
4 5 6
Does the malfunction indicator
light illuminate?
EN(H4DOTC)(diag)-63
SBF-6 MAIN SBF
3
i1
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
Check
ENGINE (DIAGNOSTICS)
BATTERY
B136
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
Yes No
Repair the ground Replace the ECM.
short circuit of har- <Ref. to
ness between FU(H4DOTC)-52,
ECM and combi- Engine Control
nation meter con- Module (ECM).>
nector.
E
EN-06128