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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 125 (Engine Control System Diagnosis (1 Of 2) (HEV)) >> DTC P0301: Cylinder 1-Misfire Detected >> System Inspection >> Timing Inspection

Timing Inspection

WARNING: This page is about a different variant/trim than selected.
  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: Scantool Display - Signal Waveform Of CKPS (Including Missing Tooth) During Semi-Cycle Of CMPS #1
    G10606579Courtesy of HYUNDAI MOTOR AMERICA
    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 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.