Accepted Answer

HI,

This code is for

340	No camshaft signal being received by the computer

This meens a signal was not received. NOt that the component is bad. YOu will need to look the wires over well and maybe check the crank position sensor check also.

BUt a good chanc eit is the cam position sensor if you have not major performance changes. When it is unplugged (or not sending a signal you motor should revert to a saved set of values and be ok. THey can be tested to confirm if they are good or bad. This is a little older test so let me know if your connector is not liek this one.

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Fig. 5: Camshaft position sensor pin terminal ID-3.5L engine

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Fig. 6: Camshaft position sensor pin terminal ID-1996-97 models

Before testing any electrical component, inspect the wiring and connectors for damage. Also wiggle the connectors to ensure a that they are firmly engaged. For this procedure a dwell meter, or the equivalent, will be needed.

1. Unplug the Camshaft Position Sensor (CPS) connector.

2. Turn the ignition ON.

3. Using a voltmeter, measure the voltage from the wiring harness connector 8-volt supply circuit (orange wire) to ground.

   1. If the voltage is 8-9.5 volts, skip to the next step.

   2. If the voltage measured is lower than 8 volts, or greater than 9.5 volts, the CPS is not receiving the correct current to function properly. There is a problem in the wiring or related components.

4. Turn the ignition OFF.

5. Attach the CPS wiring and engine wiring harness connectors back together.

6. Attach a dwell meter to the battery. Attach the lead probe of the dwell meter to the sensor signal wire (light blue wire with dark blue tracer) by backprobing the connector or by using jumper cables between the terminals. Refer to the accompanying wiring illustration.

7. Place the dwell meter out of the way of any moving components of the engine, and in a position in which it can be seen once the engine is started.

8. Turn the engine ON.

9. Watch the dwell meter for one or two minutes while the engine is idling. The dwell time shown should be a steady 49-51%. If there is any fluctuation, or the dwell time is not 49-51% the CPS is defective and must be replaced with a new one.

Hope this helps. If so please click accept. If not then please let me know and I will try to help.