Subaru 2002 IMPREZA Service Manual page 278

ENGINE MALFUNCTION INDICATOR LAMP (MIL)
ENGINE (DIAGNOSTICS)
r
112 3 1 W 1 4
718
9 110111112
L
C: CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) DOES NOT COME
ON.
DIAGNOSIS:
TROUBLE SYMPTOM:
WIRING DIAGRAM:
The CHECK ENGINE malfunction indicator lamp (MIL) circuit is open or shorted.
When the ignition switch is turned ON (engine OFF), MIL does not come on.
1
n i
~n
516 1 1 12131415161718191101
13114
J
BATTERY
Yes
Go to step 4.
@
ECM
COMBINATION
METER
C : @
No
Go to step 2.
m
P l ? E w E a
10
11 12
13 14 15 16 17 18 19 20
1121314151 16171819110111
1 2 ~ 1 3 ~ 1 4 ~ 1 5 [ 1 6 ~ 1 7 ~ 1 8 ~ 1 9 ~ 2 0 ~ 2 1 ~ 2 2 ~ 2 3 ~ 2 4
EN1
137
Step
1 CHECK OUTPUT SIGNAL FROM ECM.
1)Turn the ignition switch to ON.
2)Measure the voltage between ECM connec-
tor and chassis ground.
Connector & terminal
(8137) No. 15 (+)
-
Chassis ground ( - ) :
Check
Is the voltage less than 1 V?
EN( DOHC TU RB0)-54