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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 244 (Engine Controls - Self-Diagnostics - 4.3L) >> Diagnostic Tests >> DTC P0341: Camshaft Position Sensor Circuit Performance >> Diagnostic Procedures

Diagnostic Procedures

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  1. Did you perform the Diagnostic System Check - Engine Controls? If yes, go to next step. If no, see DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM.
  2. Install scan tool. Start engine. Monitor the CAM signal input high to low and low to high transition parameter using the scan tool. Does the scan tool parameter increment? If yes, go to next step. If no, go to step  4.
  3. Observe the Freeze Frame/Failure Records data for this DTC. Turn ignition off for 30 seconds. Start engine. Operate the vehicle within the Conditions for Running DTC or as close to the Freeze Frame/Failure Records data that you observed. See CONDITIONS FOR RUNNING DTC . Does the DTC fail this ignition cycle? If yes, go to next step. If no, see DIAGNOSTIC AIDS .
  4. Turn ignition off. Disconnect the CMP sensor connector. Turn ignition on, with engine off. Connect a Digital Volt-Ohmmeter (DVOM) between the 12-volt reference circuit of the CMP sensor and a good ground. Does the voltage measure near battery voltage? If yes, go to step  6. If no, go to next step.
  5. Turn ignition off. Disconnect the PCM. Test the 12-volt reference circuit of the CMP sensor for an open. Did you find and correct the condition? If yes, go to step  16. If no, go to step  12.
  6. Connect a test light to battery voltage. Touch the CMP sensor low reference circuit. Does the test light illuminate? If yes, go to step  8. If no, go to next step.
  7. Turn ignition off. Disconnect the PCM. Test the low reference circuit of the CMP sensor for an open high resistance. Did you find and correct the condition? If yes, go to step  16. If no, go to step  12.
  8. Start engine. Monitor the CAM signal high to low and low to high parameter on the scan tool. Connect a 5-amp fused jumper wire to battery voltage and momentarily touch the signal circuit 5 times for a duration of 1 second each. Does the cam signal high to low and low to high parameter change EACH time the signal circuit is touched? If yes, go to step  13. If no, go to next step.
  9. Did the fuse in the jumper wire open? If yes, go to step  11. If no, go to next step.
  10. Test the signal circuit of the CMP sensor for a short to voltage or an open or high resistance. Did you find and correct the condition? If yes, go to step  16. If no, go to step  12.
  11. Test the signal circuit of the CMP sensor for a short to ground. Did you find and correct the condition? If yes, go to step  16. If no, go to next step.
  12. Inspect for poor connections at the CMP sensor. Did you find and correct the condition? If yes, go to step  16. If no, go to next step.
  13. Test for an intermittent and for a poor connection at the PCM. Did you find and correct the condition? If yes, go to step  16. If no, go to step  15.
  14. Replace CMP sensor. See appropriate REMOVAL & INSTALLATION article. After replacing sensor, go to next step.
  15. Replace PCM. See appropriate REMOVAL & INSTALLATION article. Reprogram PCM. See POWERTRAIN CONTROL MODULE  under PROGRAMMING. After repairs, go to next step.
  16. Clear the DTCs with a scan tool. Turn ignition off for 30 seconds. Start engine. Operate the vehicle within the Conditions for Running DTC. See CONDITIONS FOR RUNNING DTC . Does the DTC run and pass? If yes, go to next step. If no, go to step  2.
  17. Observe the stored information, Capture Info with a scan tool. Does the scan tool display any DTCs that you have not diagnosed? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay.
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