Subaru IMPREZA GD 2007 Series Manual page 285

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK CONDITION OF CRANKSHAFT PO-
SITION SENSOR.
2 CHECK CRANKSHAFT POSITION SENSOR.
1) Turn the ignition switch to OFF.
2) Remove the crankshaft position sensor.
3) Measure the resistance between connector
terminals of crankshaft position sensor.
Terminals
No. 1 — No. 2:
3 CHECK HARNESS BETWEEN ECM AND
CRANK SHAFT POSITION SENSOR.
1) Disconnect the connectors from the ECM.
2) Measure the resistance of harness between
the ECM and crankshaft position sensor con-
nector.
Connector & terminal
(B134) No. 13 — (E10) No. 1:
(B134) No. 14 — (E10) No. 2:
Check
Is the crankshaft position sen-
sor installation bolt tightened
securely?
Is the resistance between 1 —
4 kΩ?
Is the resistance less than 1 Ω? Repair the poor
EN(H4SO)(diag)-176
Yes No
Go to step 2. Tighten the crank-
shaft position sen-
sor installation bolt
securely.
Go to step 3. Replace the crank-
shaft position sen-
sor. <Ref. to
FU(H4SO)-23,
Crankshaft Posi-
tion Sensor.>
Repair the harness
contact of the ECM and connector.
and crankshaft
NOTE:
position sensor
In this case, repair
connector.
the following item:
• Open circuit of
harness between
ECM and crank-
shaft position sen-
sor connector
• Poor contact of
coupling connector