Subaru Legacy 2002 Service Manual page 1420

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
No.
1 CHECK HARNESS BETWEEN CRANK-
SHAFT POSITION SENSOR AND ECM.
1) Turn ignition switch to OFF.
2) Disconnect connector from ECM.
3) Measure resistance between crankshaft
position sensor and ECM.
Connector & terminal
(E10) No. 1 — (B135) No. 2:
(E10) No. 2 — (B135) No. 11:
2 CHECK HARNESS BETWEEN CRANK-
SHAFT POSITION SENSOR AND ECM.
Measure resistance between crankshaft posi-
tion sensor and engine ground.
Connector & terminal
(E10) No. 1 — Engine ground:
(E10) No. 2 — Engine ground:
3 CHECK CONDITION OF CRANKSHAFT
POSITION SENSOR.
4 CHECK CRANKSHAFT POSITION SENSOR.
1) Turn ignition switch to OFF.
2) Remove crankshaft position sensor.
3) Measure resistance between connector
terminals of crankshaft position sensor.
Terminals
No. 1 — No. 2:
5 CHECK POOR CONTACT.
Check poor contact in ECM connector.
Step
Is the resistance less than
1 Ω?
Is the resistance more than
1 MΩ?
Is the crankshaft position
sensor installation bolt
tightened securely?
Is the resistance between
1,600 and 2,100 Ω?
Is there poor contact in
ECM connector?
EN(H6)-213
Check Yes
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Repair poor con-
tact in ECM con-
nector.
Engine (DIAGNOSTICS)
No
Repair open cir-
cuit between
crankshaft posi-
tion sensor and
ECM.
Repair ground
short circuit
between crank-
shaft position sen-
sor and ECM.
Tighten crankshaft
position sensor
installation bolt.
Replace crank-
shaft position sen-
sor. <Ref. to
FU(H6)-31, Cam-
shaft Position
Sensor.>
Replace ECM.
<Ref. to FU(H6)-
47, Engine Con-
trol Module.>