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Home >> Chevrolet >> 2003 >> Malibu Base >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Removal & Installation >> Programming >> CKP System Variation Learn Procedure
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CKP System Variation Learn Procedure

  1. Connect scan tool.
  2. Monitor the Powertrain Control Module (PCM) for DTCs using scan tool. If other DTCs are set, except DTCs P1336, refer to DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - 3.1L CENTURY, GRAND PRIX & MALIBU article for the applicable DTC that set.
  3. Select the crankshaft position variation learn procedure using the scan tool.
  4. Observe the fuel cut-off specifications for that engine.
  5. The scan tool instructs you to perform the following:
    • Block the drive wheels.
    • Apply the vehicles parking brake.
    • Cycle the ignition from OFF to ON.
    • Apply and hold the brake pedal.
    • Start and idle the engine.
    • Turn OFF the A/C.
    • Place the vehicle's automatic transmission in Park, or the manual transmission in Neutral.
    • The scan tool monitors certain component signals to determine if all the conditions are met to continue with the procedure. The scan tool only displays the condition that inhibits the procedure. The scan tool monitors the following components:
      1. Crankshaft Position Sensors Activity  - If there is a CKP sensor condition, refer to the applicable DTC that set.
      2. Camshaft Position Sensor Activity  - If there is a CMP sensor condition, refer to the applicable DTC that set.
      3. Engine Coolant Temperature  - If the engine coolant temperature is not warm enough, idle the engine until the engine coolant temperature reaches the correct temperature.
  6. Enable the crankshaft position system variation learn procedure using the scan tool.
    7. NOTE: While the learn procedure is in progress, release the throttle immediately when the engine starts to decelerate. The engine control is returned to the operator and the engine responds to throttle position after the learn procedure is complete.
  7. Slowly increase the engine speed to the RPM that you observed.
  8. Release when the fuel cut-off occurs.
  9. The scan tool displays LEARN STATUS: LEARNED THIS IGNITION. If the scan tool does NOT display this message and no additional DTCs set, refer to SYMPTOMS in TROUBLE SHOOTING - NO CODES - 3.1L CENTURY, GRAND PRIX & MALIBU article. If a DTC set, see DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - 3.1L CENTURY, GRAND PRIX & MALIBU article for the applicable DTC that set.
  10. Turn ignition switch to OFF position for 30 seconds after the learn procedure is completed successfully.
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