Subaru 2002 IMPREZA Service Manual page 1227

DIAGNOSTICS FOR ENGINE STARTING FAILURE
• RHD model
SBF-1
E
E31
E32
E33
E34
1
2
3
Step
1 CHECK SPARK PLUG CONDITION.
1)Remove the spark plug. <Ref. to
IG(TURBO)-5, INSTALLATION, Spark Plug.>
2)Check the spark plug condition. <Ref. to
IG(TURBO)-6, INSPECTION, Spark Plug.>
2 CHECK IGNITION SYSTEM FOR SPARKS.
1)Connect the spark plug to ignition coil.
2)Release the fuel pressure. <Ref. to
FU(TURBO)-53, RELEASING OF FUEL
PRESSURE, OPERATION, Fuel.>
3)Contact the spark plug's thread portion on
engine.
4)While opening the throttle valve fully, crank
engine to check that spark occurs at each cyl-
inder.
SBF-4
4 1
IGNITION
SWITCH
B72
B22
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
EN(TURBO)-67
No.11
B22
E3
E31
IGNITION COIL IGNITION COIL
No.1 No.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
Check
Is the spark plug's status OK? Go to step 2.
Does spark occur at each cyl-
inder?
ENGINE (DIAGNOSTICS)
B136
ECM
E32 E33
IGNITION COIL IGNITION COIL
No.3 No.4
B72
1 2
3 4
Yes
Replace the spark
plug.
Check the fuel Go to step 3.
pump system.
<Ref. to
EN(TURBO)-70,
FUEL PUMP CIR-
CUIT, Diagnostics
for Engine Start-
ing Failure.>
E34
E
EN1431
No