Subaru Impreza 2003 Service Manual page 477

DIAGNOSTICS FOR ENGINE STARTING FAILURE
D: IGNITION CONTROL SYSTEM
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO)-46, OP-
ERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO)-39, OPERATION, Inspec-
tion Mode.>.
• WIRING DIAGRAM:
C:
A:
IGNITOR COIL
IGNITOR ASSY
E
E12 B72
1 2 3 4
1 2
3 4
Step
1 CHECK IGNITION SYSTEM FOR SPARKS.
1)Remove the plug cord cap from each spark
plug.
2)Install the new spark plug on plug cord cap.
CAUTION:
Do not remove the spark plug from engine.
3)Contact the spark plug's thread portion on
engine.
4)While opening the throttle valve fully, crank
the engine to check that spark occurs at each
cylinder.
B136
ECM
B134
No.11
B22
E3
E12
3 4
1 2
&
B22
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
EN(H4SO)-65
IGNITION
B72
SWITCH
SBF-4
4 1
1.6 L : 2
1
*
2.0 L : 4
1.6 L : 4
2
*
2.0 L : 1
1.6 L : 1
3
*
2.0 L : 2
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
Check
Does spark occur at each cyl-
inder?
ENGINE (DIAGNOSTICS)
BATTERY
SBF-1
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
Yes
Check fuel pump Go to step 2.
system. <Ref. to
EN(H4SO)-68,
FUEL PUMP CIR-
CUIT, Diagnostics
for Engine Start-
ing Failure.>
E
EN-01419
No