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Home >> Hyundai >> 2006 >> Accent Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) >> DTC Troubleshooting Procedures >> DTC P0337 Crankshaft Position Sensor A Circuit Low Input >> Component Inspection
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Component Inspection

  1. Check CKPS.
    1. Key "ON". (Don't disconnect sensors.)
    2. Select "vehicle scopemeter" in the menu, and connect channel A of scantool with terminal 1 of CKPS harness connector.
    3. Engine start. And check the signal waveforms.

      SPECIFICATION: 

      Fig 1: CKPS And CMPS Signal Waveform Graph
      G04801705
    4. Is the measured signal waveform O.K?

      YES  : --> Go to "Check ECM/PCM" as follows.

      NO  : --> Substitute with a known - good CKPS and check for proper operation.

      --> If the problem is corrected, replace CKPS and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

  2. Check ECM/PCM.
    1. IG "OFF".
    2. Connect scantool and Engine "ON".
    3. Select simulation function on scantool.
    4. Simulate frequency (Hz) at terminal 1 of CKPS signal connector.
      Fig 2: Scantool Display - Simulation Of Frequency At Terminal 1 Of CKPS
      G04801706
    5. Does the signal value of CKPS change according to simulation frequency?

      YES  : --> Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

      NO  : --> Substitute with a known - good ECM/PCM and check for proper operation.

      --> If the problem is corrected, replace ECM/PCM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

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