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Home › Kia › 2016 › Forte LX, Automatic Trans › Repair and Diagnosis › Engine Performance › System › Engine Control System Diagnosis - 1.8L (2 Of 3) › DTC P0300: Random/Multiple Cylinder Misfire Detected › 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 shown below.
    Fig 1: Screen Display - Signal Waveform Of CMPS
    G11798589Courtesy of KIA MOTORS AMERICA, INC.
    Fig 2: Screen Display - Signal Waveform Of CKPS
    G11798590Courtesy of KIA MOTORS AMERICA, INC.
    1. There are 60 signals of CKPS (Including missing tooth) during the semi-cycle of CMPS #1.
    2. There are 3~5 signals of CKPS between the switching point of CMPS #1 and the missing tooth of CKPS.
  3. Is the signal waveform normal?

    YES 

    • Go to next step as shown 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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