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Home >> Hyundai >> 2007 >> Accent GLS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (2 Of 2) >> DTC Troubleshooting Procedures >> DTC P0501 Vehicle Speed Sensor A Range/Performance >> Signal Circuit Inspection

Signal Circuit Inspection

  1. Check short to ground in harness.
    1. Key "OFF".
    2. Disconnect ECM/PCM connector.
    3. Disconnect ABS control unit.
    4. Measure resistance between terminal 20/C01-1 of ECM/PCM harness connector and chassis ground. Measure resistance between terminal 64/C01 of ECM/PCM harness connector and chassis ground

      Specification: Infinite

      Fig 1: Measuring Resistance Between Terminal 20/C01-1 Of ECM/PCM Connector & Chassis Ground
      G04801783Courtesy of HYUNDAI MOTOR CO.
      Fig 2: Measuring Resistance Between Terminal 64/C01 Of ECM/PCM Connector & Chassis Ground
      G04801784Courtesy of HYUNDAI MOTOR CO.
    5. Is the measured resistance within specification?

      YES  : --> Go to "Check open in harness" as follows.

      NO  : --> Repair short to ground in harness, and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

  2. Check for open in harness.
    1. Key "OFF".
    2. Disconnect ECM/PCM connector.
    3. Disconnect ABS control unit connector.
    4. Measure resistance between terminal 20/C01-1 of ECM/PCM harness connector and terminal 3/E51 of ABS control module harness connector. (A/T)

      Measure resistance between terminal 64/C01 of ECM/PCM harness connector and terminal 3/E51 of ABS control module harness connector. (M/T)

      Specification: Approx. below 1Ω

      Fig 3: Measuring Resistance Between ECM/PCM Connector & ABS Control Module Connector Terminal (1 Of 2)
      G04801785Courtesy of HYUNDAI MOTOR CO.
      Fig 4: Measuring Resistance Between ECM/PCM & ABS Control Module Connector Terminal (2 Of 2)
      G04801786Courtesy of HYUNDAI MOTOR CO.
    5. Is the measured resistance within specifications?

      YES  : --> Go to "COMPONENT INSPECTION " procedure.

      NO  : --> Repair Open circuit and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.



  1. Key "ON".
  2. Measure the voltage between terminal 2/E50 of wheel speed sensor harness connector and chassis ground. (Don't disconnect the WSS connector.)

    Specification: 0.7 V or 1.4 V

    Fig 1: Measuring Voltage Between Terminal 2/E50 Of Wheel Speed Sensor Connector & Chassis Ground
    G04801790Courtesy of HYUNDAI MOTOR CO.
  3. Is the measured voltage within specifications?

    YES  : --> Go to "COMPONENT INSPECTION " as follows.

    NO  : --> Repair Open or Short in harness, and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

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