Engine Control System

DTC 13
CAMSHAFT POSITION SENSOR






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

Trouble Symptom
- Engine stalls.
- Failure of Engine to start.

1. Check input signal for ECM.






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

Connector & Terminal:
(E3O) No. 8 - (E3O) No. 9.






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

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






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

Connector & Terminal / Specified Resistance:
(E3O) No. 8 - (E19) No. 1 / 10 Ohms, maximum
(E30) No. 9 - (E19) 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. 8 - Body / 1 M-Ohm, minimum
(E3O) No. 9 - Body / 1 M-Ohm, minimum
(E3O) No. 11 - Body / 1 M-Ohm, minimum

3. Check Camshaft Position Sensor.
a. Remove Camshaft 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.