Subaru Legacy 2004 Service Manual page 915

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK OPTION CODE.
2 CHECK HARNESS BETWEEN CRANK-
SHAFT POSITION SENSOR AND ECM CON-
NECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from crankshaft
position sensor.
3) Measure the resistance of harness
between crankshaft position sensor connector
and engine ground.
Connector & terminal
(E10) No. 1 — Engine ground:
3 CHECK HARNESS BETWEEN CRANK-
SHAFT POSITION SENSOR AND ECM CON-
NECTOR.
Measure the resistance of harness between
crankshaft position sensor connector and
engine ground.
Connector & terminal
(E10) No. 1 — Engine ground:
4 CHECK HARNESS BETWEEN CRANK-
SHAFT POSITION SENSOR AND ECM CON-
NECTOR.
Measure the resistance of harness between
crankshaft position sensor connector and
engine ground.
Connector & terminal
(E10) No. 2 — Engine ground:
Check
Is the option code EC, EK or
K4?
Is the resistance more than
100 k!?
Is the resistance less than 10
!?
Is the resistance less than 5
!?
EN(H4SO 2.5)(diag)-156
Yes
Go to step 2. Refer to EN(H4SO
2.0) section. <Ref.
to EN(H4SO
2.0)(diag)-66, List
of Diagnostic Trou-
ble Code (DTC).>
NOTE:
Fuel injection sys-
tem for KA and KS
model is the same
as 2.0 L model.
Repair the har- Go to step 3.
ness and connec-
tor.
NOTE:
In this case, repair
the following:
• Open circuit in
harness between
crankshaft posi-
tion sensor and
ECM connector
• Poor contact in
ECM connector
• Poor contact in
coupling connector
Repair the ground Go to step 4.
short circuitrepair
the ground short
circuit in harness
between crank-
shaft position sen-
sor and ECM
connector.
NOTE:
The harness be-
tween both con-
nectors are
shielded. Repair
the ground short
circuit in harness
with shield.
Go to step 5. Repair the har-
ness and connec-
tor.
NOTE:
In this case, repair
the following:
• Open circuit in
harness between
crankshaft posi-
tion sensor and
ECM connector
• Poor contact in
ECM connector
• Poor contact in
coupling connector
No