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Home >> Hyundai >> 2009 >> Elantra GLS, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> DTC Troubleshooting Procedures >> DTC P0501 Vehicle Speed Sensor A Range/Performance >> Signal Circuit Inspection

Signal Circuit Inspection

[WITH ABS] 

  1. Check for short to ground in signal circuit
    1. Ignition "OFF"
    2. Disconnect ECM and ABS Control Module connectors
    3. Measure resistance between terminal 53 of the ECM harness connector and chassis ground

      Specification:  Infinite

      Fig 1: Measuring Resistance Between Terminal 53 Of ECM Harness Connector And Chassis Ground
      G05363870Courtesy of HYUNDAI MOTOR CO.
    4. Is resistance within the specification?

      YES 

      • Go to  2

      NO 

  2. Check for short to battery in signal circuit
    1. Ignition "ON" & Engine "OFF"
    2. Measure voltage between terminal 53 of the ECM harness connector and chassis ground

      Specification:  Approx. 0V

      Fig 2: Measuring Voltage Between Terminal 53 Of ECM Harness Connector And Chassis Ground
      G05363871Courtesy of HYUNDAI MOTOR CO.
    3. Is voltage within the specification?

      YES 

      • Go to next step as below

      NO 

  3. Check for open in signal circuit
    1. Ignition "OFF"
    2. Measure resistance between terminals 53 of the ECM harness connector and 14 of the ABS Control Module harness connector

      Specification:  Approx. 0Ω

      Fig 3: Measuring Resistance Between Terminals 53 Of ECM Harness Connector And 14 Of ABS Control Module Harness Connector
      G05363872Courtesy of HYUNDAI MOTOR CO.
    3. Is resistance within the specification?

      YES 

      • Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure

      NO 

[WITHOUT ABS SYSTEM] 

  1. Check for short to ground in Signal circuit
    1. Ignition "OFF"
    2. Disconnect ECM and wheel speed sensor (front right) harness connector
    3. Measure resistance between terminal 55 of the ECM harness connector and chassis ground
    4. Measure resistance between terminal 56 of the ECM harness connector and chassis ground

      Specification:  Infinite

      Fig 4: Measuring Resistance Between Terminal 55 And 56 Of ECM Harness Connector And Chassis Ground
      G05363873Courtesy of HYUNDAI MOTOR CO.
    5. Is resistance within the specification?

      YES 

      • Go to next step as below

      NO 

  2. Check for short to battery in signal circuit
    1. Ignition "ON" & Engine "OFF"
    2. Measure voltage between terminal 55 of the ECM harness connector and chassis ground
    3. Measure voltage between terminal 56 of the ECM harness connector and chassis ground

      Specification:  Approx. 0V

      Fig 5: Measuring Voltage Between Terminal 55 And 56 Of ECM Harness Connector And Chassis Ground
      G05363874Courtesy of HYUNDAI MOTOR CO.
    4. Is voltage within the specification?

      YES 

      • Go to  3

      NO 

  3. Check for open in signal circuit
    1. Ignition "OFF"
    2. Measure resistance between terminals 1 of the wheel speed sensor harness connector and 55 of the ECM harness connector.
    3. Measure resistance between terminals 2 of the wheel speed sensor harness connector and 56 of the ECM harness connector.

      Specification:  Approx. 0Ω

      Fig 6: Measuring Resistance Between Terminals 1, 2 Of Wheel Speed Sensor Harness Connector And 55, 56 Of ECM Harness Connector
      G05363875Courtesy of HYUNDAI MOTOR CO.
    4. Is resistance within the specification?

      YES 

      • Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure

      NO 

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