LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 385 (Engine Controls Self-Diagnostics) >> Diagnostic Tests >> DTC P0341: Camshaft Position Sensor Circuit Performance >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
  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. NOTE: If DTC P0342 or P0343 are set diagnose those DTCs first. See DTC P0342: CMP SIGNAL LOW  and/or DTC P0343: CMP SIGNAL HIGH  .
  2. Observe the Freeze Frame/Failure Records for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition cycle? If yes, go to next step. If no, see DIAGNOSTIC AIDS .
  3. Visually and physically inspect all circuits going to the CMP sensor for the following:
    • Being routed too close to secondary ignition wires or components.
    • Being routed too close to aftermarket add-on electrical equipment.
    • Being routed too close to solenoids, relays, and motors.

    If you find incorrect routing, correct the harness routing. Did you find and correct the condition? If yes, go to step  9. If no, go to next step.

  4. Test for an intermittent and/or poor connections at the CMP sensor. Did you find and correct the condition? If yes, go to step  9. If no, go to next step.
  5. Test for an intermittent and/or poor connections at the PCM. Did you find and correct the condition? If yes, go to step  9. If no, go to next step.
  6. Remove the CMP sensor. See CAMSHAFT POSITION SENSOR under SENSORS in REMOVAL & INSTALLATION - CORVETTE article. Inspect the CMP sensor for signs of damage. Visually inspect the CMP sensor for the following conditions:
    • Physical damage.
    • Excessive wear of the sensor.
    • Loose or improper installation.

    If yes, go to step  9. If no, go to next step.

  7. Visually inspect CMP sensor reluctor wheel for damage. If CMP reluctor wheel is damaged, see appropriate article in ENGINES. Did you find and correct the condition? If yes, go to step  9. If no, go to next step.
  8. Replace the CMP sensor. See CAMSHAFT POSITION SENSOR under SENSORS in REMOVAL & INSTALLATION - CORVETTE article. Did you complete the replacement? If yes, go to next step.
  9. Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running DTC. Does the DTC run and pass? If yes, go to next step. If no, go to step  2.
  10. Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay.
scientia non olet · About LEMON Manuals