Subaru IMPREZA 2004 Service Manual page 74

ENGINE (DIAGNOSTICS)
F: FUEL INJECTOR CIRCUIT
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO)(diag)-47,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO)(diag)-40, OPERATION,
Inspection Mode.>.
• WIRING DIAGRAM:
MAIN RELAY
6
4
5
3
2
1
B47
FUEL INJECTOR
No. 1
E5 E16
E6 E17
1 2
B134
1 2 3 4
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
24 25 26 27 28 29
Step
1 CHECK OPERATION OF EACH FUEL INJEC-
TOR.
While cranking the engine, check that each
fuel injector emits "operating" sound. Use a
sound scope or attach a screwdriver to the
injector for this check.
Diagnostics for Engine Starting Failure
LHD
E5 E16
FUEL INJECTOR
No. 2
B47
1 2
3 4
5 6
5 6 7 8
30 31 32 33 34 35
EN(H4SO)(diag)-72
2 LHD
B61 F44
ECM
B134
E6
FUEL INJECTOR
No. 3
F44
1 2 3 4
5 6 7 8
Check
Dose the fuel injector operate? Check the fuel
BATTERY
SBF-5
B22
E3
E17
FUEL INJECTOR
No. 4
B22
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
Yes
Go to step 2.
pressure. <Ref. to
ME(H4SO)-31,
INSPECTION,
Fuel Pressure.>
E
EN-01428
No