P0340

DTC PO34O CAMSHAFT POSITION SENSOR CIRCUIT MALFUNCTION (CAM)





DESCRIPTION



- The camshaft position sensor is located on the left-hand camshaft support to detect the combustion cylinder at any one moment.
- It is designed so that the Engine Control Module (ECM) accurately reads the number of pulses which occur when protrusions provided on the back of the LH camshaft-drive sprocket cross the sensor.
- Internal construction and the basic operating principle of the camshaft position sensor are similar to those of the crankshaft position sensor. A total of seven protrusions (one each at two locations, two at one location and three at one location) are arranged in four equal parts of the sprocket.

DTC DETECTING CONDITION
Immediately at fault recognition.

TROUBLE SYMPTOM
- Engine stalls.
- Failure of engine to start.


CIRCUIT DIAGRAM









PROCEDURES




1. Check harness.
a. Turn ignition switch to "OFF".
b. Disconnect connector from camshaft position sensor.




c. Measure resistance of harness between camshaft position sensor connector and body.

[CHECK]: Connector & terminal: (E15) No. 1 - Body/ 100 K-Ohms or more.
[YES]: Check and repair the following items.
- Open circuit of harness between camshaft position sensor connector and ECM connector
- Poor contact in ECM connector.
- Poor contact in the coupling connector (B20).
[NO]: Go to next [CHECK].


[CHECK]: Connector & terminal: (E15) No. 1 - Body/ 10 K-Ohms or less.
[YES]: Repair short circuit of harness between camshaft position sensor connector and ECM connector.

NOTE: The harness between both connectors is shielded. Repair short circuit of harness together with shield.

[NO]: Go to next [CHECK].

[CHECK]: Connector & terminal: (E15) No. 2 - Body/ 10 Ohms or less.
[NO]: Check and repair the following items.
- Open circuit of harness between camshaft position sensor connector and ECM connector.
- Poor contact in ECM connector.
- Poor contact in the coupling connector (B20).
[YES]: Go to step 2.

2. Check camshaft position sensor.
[CHECK]: Check for secure tightening of the installation bolts at the camshaft position sensor.
[NO]: Tighten securely.
[YES]: Go to the next step.

a. Remove camshaft position sensor.
b. Measure resistance between connector terminals of camshaft position sensor.





[CHECK]: Terminals: No. 1 - No. 2/ 1 - 4 K-Ohms.
[YES]: Repair poor contact in camshaft position sensor connector.
[NO]: Replace camshaft position sensor.