*performing the following test will set a diagnostic trouble code and illuminate the check engine light. Clear the code after performing the tests and making the necessary repairs*
Check the terminals in the connector and the wires leading to the sensor for looseness and breaks. repair as required.
before checking the camshaft position sensor, check the voltage supply and ground circuts from the ECM. Disconnect the electrical connector from the camshaf position sensor and connect a voltmeter to terminals 1 and 3 at the harness connector. (terminal 1 is the flat side of the plug and terminal 3 is the rounded side of the plug) Turn the ignition key on - the voltage should read approx. 5.0 volts. IF the voltage is incorrect, check the wiring from the CPS to the ECM. IF the circuts are good, have the ECM checked at a dealer service department or properly equipped repair facility.
To check the cPM operation, reconnect the connector to the CPM and using a suitable probe, backprobe terminal no 2 of the CPS connector. Connect the positive lead of a voltmeter to the probe and the negative lead to a good engine ground point. Turn the ignition key on. Rotate the engine slowly with a breaker bar and a socket attached to the crankshaft pulley center bolt while watching the meter. The voltage should fluctuate between 0 and 10.0 volts as the vanes in the reluctor wheel pass the sensor. If the results are incorrect, replace the CPS.
Rotate the engine slowly through 2 revolutions at least. Removing the spark plugs will make the crankshaft much easier to turn. IF you remove the spark plugs, unplug the primary electrical connectors from the ignition coils to disable the ignition system.
Hope this helps!
Monday, November 19th, 2007 AT 11:03 AM