Engine Control System

DTC 11
CRANKSHAFT POSITION SENSOR






Diagnosis
- No signal entered from Crankshaft Position Sensor, but signal entered from Camshaft Position Sensor.
- The harness connector between Engine Control Module (ECM) and Crankshaft Position Sensor is in short or open.

Trouble Symptom
- Engine stalls.
- Restarting impossible.

1. Check input signal for ECM.






a. Set the positive (+) probe and earth lead of oscilloscope at ECM connector terminals.

Connector & Terminal:
(E3O) No. 6 - (E3O) No. 7.






b. Measure signal voltage indicated on oscilloscope while cranking the Engine.

2. Check harness connector between ECM and Crankshaft Position Sensor.
a. Turn Ignition Switch to "OFF".
b. Disconnect connectors from ECM and Crankshaft Position Sensor.






c. Measure resistance of harness connector between ECM and Crankshaft Position Sensor.

Connector & Terminal / Specified Resistance:
(E30) No. 6 - (E14) No. 1 / 10 Ohms, maximum
(E30) No. 7 - (E14) No. 2 / 10 Ohms, maximum






d. Measure resistance of harness connector between ECM and body to make sure that circuit does not short.

Connector & Terminal / Specified Resistance:
(E3O) No. 6 - Body 1 / 1 M-Ohm, minimum
(E3O) No. 7 - Body 1 / 1 M-Ohm, minimum
(E3O) No. 11 - Body 1 / 1 M-Ohm, minimum

3. Check Crankshaft Position Sensor.
a. Remove Crankshaft Position Sensor.






b. Set the position (+) probe at sensor connector terminal No. 1 and set earth lead at terminal No. 2.
c. Check that a wave profile appears crossing a magnet near the Pick-Up Coil of Crankshaft Position Sensor.