Impreza GT F4-2.5L Turbo (2009)
Crankshaft Position Sensor: Testing and Inspection
Crankshaft Position Sensor
INSPECTION
1. CRANKSHAFT POSITION SENSOR (METHOD WITH CIRCUIT TESTER)
1. Disconnect the ground cable from battery.
2. Remove the crankshaft position sensor.
3. Measure the resistance between crankshaft position sensor terminals.
2. CRANKSHAFT POSITION SENSOR (METHOD WITH OSCILLOSCOPE)
1. Prepare an oscilloscope.
2. Remove the lower inner trim of passenger's side.
3. Turn over the floor mat of passenger's seat.
4. Remove the protect cover.
5. Remove the nuts and bolts which hold the ECM to the bracket.