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Home >> Kia >> 2012 >> Optima Hybrid >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) - HEV >> DTC P0300:Random Multiple Cylinder Misfire Detected >> Inspection Repair >> System Inspection >> Timing Inspection

Timing Inspection

  1. Set up an oscilloscope as follows:

    Channel A (+): Signal terminal of the CMPS #1(back probe), (-): ground

    Channel B (+): Signal terminal of the CKPS(back probe), (-): ground

  2. Start the engine and check for signal waveform compared with reference waveform as below.
    Fig 1: Display - CKPS Voltage Waveform (Switching Point And Semi-Cycle Of CMPS)
    G08305976Courtesy of KIA MOTORS AMERICA, INC.
  3. Is the signal waveform normal?

    YES 

    • Go to next step as below.

    NO 

    • Repair or readjust as necessary, if air gap of the CKPS is exceeds specification[0.3~1.7 mm (0.012~0.067 in)]. If OK, check that the crankshaft and camshaft are correctly aligned the matching marks of the pulleys. Repair or readjust as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
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