Subaru FORESTER 2001 Service Manual page 177

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Engine (Diagnostics)
No.
5 CHECK FUEL INJECTOR.
Measure resistance between fuel injector ter-
minals on faulty cylinder.
Terminals
No. 1 — No. 2:
6 CHECK POWER SUPPLY LINE.
1) Turn ignition switch to ON.
2) Measure voltage between fuel injector and
engine ground on faulty cylinders.
Connector & terminal
#1 (E5) No. 2 (+) — Engine ground (−):
#2 (E16) No. 2 (+) — Engine ground
(−):
#3 (E6) No. 2 (+) — Engine ground (−):
#4 (E17) No. 2 (+) — Engine ground
(−):
7 CHECK HARNESS BETWEEN FUEL INJEC-
TOR AND ECM CONNECTOR.
1) Turn ignition switch to OFF.
2) Disconnect connector from fuel injector on
faulty cylinder.
3) Turn ignition switch to ON.
4) Measure voltage between ECM connector
and chassis ground on faulty cylinders.
Connector & terminal
#1 (B137) No. 1 (+) — Chassis ground
(−):
#2 (B136) No. 6 (+) — Chassis ground
(−):
#3 (B136) No. 5 (+) — Chassis ground
(−):
#4 (B136) No. 4 (+) — Chassis ground
(−):
8 CHECK FUEL INJECTOR.
1) Turn ignition switch to OFF.
2) Measure resistance between fuel injector
terminals on faulty cylinder.
Terminals
No. 1 — No. 2:
9 CHECK INSTALLATION OF CAMSHAFT
POSITION SENSOR/CRANKSHAFT POSI-
TION SENSOR.
Step
Is the resistance between 5
and 20 Ω?
Is the voltage more than 10
V?
Is the voltage more than 10
V?
Is the resistance less than
1 Ω?
Is camshaft position sensor
or crankshaft position sen-
sor loosely installed?
EN(DOHC TURBO)-176
Check Yes
Go to step 6.
Repair poor con-
tact in all connec-
tors in fuel injector
circuit.
Repair battery
short circuit in
harness between
ECM and fuel
injector. After
repair, replace
ECM. <Ref. to
FU(DOHC
TURBO)-47,
Engine Control
Module.>
Replace faulty
fuel injector <Ref.
to FU(DOHC
TURBO)-37, Fuel
Injector.> and
ECM <Ref. to
FU(DOHC
TURBO)-47,
Engine Control
Module.>
Tighten camshaft
position sensor or
crankshaft posi-
tion sensor.
No
Replace faulty
fuel injector. <Ref.
to FU(DOHC
TURBO)-37, Fuel
Injector.>
Repair harness
and connector.
NOTE:
In this case,
repair the follow-
ing:
¼ Open circuit in
harness between
main relay and
fuel injector con-
nector on faulty
cylinders
¼ Poor contact in
coupling connec-
tor
¼ Poor contact in
main relay con-
nector
¼ Poor contact in
fuel injector con-
nector on faulty
cylinders
Go to step 8.
Go to step 9.
Go to step 10.