Mazda Car 2002-04

Timing Check

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2.5L (Kl) Engine



  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Let the engine warm to normal operating temperature.
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  5. Apply the parking brake. If equipped with a manual transaxle, place the shifter in the neutral position. If equipped with an automatic transaxle, place the shift lever in P .
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  7. Start the engine and allow it to come to normal operating temperature. Be sure all accessories are OFF .
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  9. Wait until the cooling fan stops, then , connect the scan tool to the Data Link Connector 2 (DLC2) and access the RPM PID.
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  11. Locate the timing marks on the crankshaft pulley and timing belt lower cover. The engine may have to be cranked slightly to see the mark on the crankshaft pulley.

    Click image to see an enlarged view

    Fig. Jumper the connections shown on the data link connector and system selector tool

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  13. Check the idle speed and adjust, if necessary.
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  15. Connect a jumper wire between the TEN terminal and the GND terminal at the underhood diagnosis connector.
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  17. Connect the system selector tool to the DLC and set switch A to position 1 .
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  19. Set the test switch to SELF TEST .
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  21. Connect an inductive timing light according to the manufacturer's instructions.

    Click image to see an enlarged view

    Fig. Connect an inductive timing light and aim it at the crankshaft pulley. Read the pulley mark against the scale

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  23. Start the engine and allow the idle to stabilize. Aim the timing light at the timing marks. The timing should be 9-11 degrees Before Top Dead Center (TDC).

    Click image to see an enlarged view

    Fig. If adjustment is necessary, loosen the distributor lockbolts and rotate it until the mark is aligned

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  25. Loosen the distributor lockbolts just enough to turn the distributor. While aiming the timing light at the timing marks, turn the distributor until the marks are aligned. Tighten the distributor lockbolts to 14-18 ft. lbs. (19-25 Nm) and recheck the timing.
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  27. The ignition timing is now set. Disconnect the jumper wire from the DLC
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  29. Remove all test equipment.
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Except Millenia 2.5L (Kl) Engines



  1. Before servicing the vehicle, refer to the Precautions section.
    NOTE
    If the information given in the following procedures differs from that on the emission information label located in the engine compartment, follow the directions given on the label. The label often reflects production changes made during the model year.

  2.  

The timing is controlled by the computer. Ignition timing adjustment is not possible or necessary.

  1. If the timing is still not within specification. the following components may be defective:

    Camshaft position (CMP) sensor
     
    Crankshaft Position (CKP) sensor
     
    Throttle Position (TP) sensor
     
    Engine Coolant Temperature (ECT) sensor
     
    Neutral switch if equipped with a manual transaxle
     
    Clutch switch if equipped with a manual transaxle
     
    Transaxle range switch if equipped with an automatic transaxle
     

  2.  
  3. If the above components are normal, replace the Powertrain Control Module (PCM).
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