WOMS
C code chassis Medium severity

C1752 Vehicle Speed Sensor # 1 Output Circuit Short to Gnd

The OBD2 code C1752 indicates that there is a short circuit in the output circuit of Vehicle Speed Sensor #1, causing it to send an incorrect signal to the vehicle's control module

Definition

The OBD2 code C1752 indicates that there is a short circuit in the output circuit of Vehicle Speed Sensor #1, causing it to send an incorrect signal to the vehicle's control module

Common causes

  • Damaged wiring or connectors
  • Faulty vehicle speed sensor
  • Short circuit in the sensor circuit
  • Corroded connectors
  • Poor ground connection
  • Malfunctioning engine control module (ECM)

Common misdiagnoses

  • Faulty Vehicle Speed Sensor
  • Wiring issues or shorts in the harness
  • Faulty Engine Control Module (ECM)
  • Faulty Transmission Control Module (TCM)
  • Incorrectly installed or damaged connectors
  • Issues with the ABS module
  • Problems with the wheel speed sensors
  • Faulty speedometer or instrument cluster
  • Grounding issues in the electrical system
  • Software or calibration issues in the vehicle's computer systems

Troubleshooting steps

  1. 1. Check the Vehicle's Manual

    Refer to the vehicle's service manual for specific information regarding the vehicle speed sensor (VSS) and its wiring diagram

  2. 2. Visual Inspection

    Wiring and Connectors: Inspect the wiring harness and connectors associated with the vehicle speed sensor for any signs of damage, fraying, or corrosion. Look for loose connections or broken wires

  3. 3. Sensor Condition

    Check the physical condition of the vehicle speed sensor itself. Ensure it is securely mounted and not damaged

  4. 4. Test the Vehicle Speed Sensor

    Resistance Check: Use a multimeter to measure the resistance of the vehicle speed sensor. Compare the readings to the specifications in the service manual

  5. 5. Voltage Check

    With the ignition on (engine off), check for the proper voltage at the sensor connector. You should see a reference voltage (usually around 5V) and ground

  6. 6. Check for Short Circuits

    Continuity Test: With the vehicle off, perform a continuity test on the sensor wiring to check for shorts to ground. Disconnect the sensor and check the wiring from the sensor connector back to the PCM (Powertrain Control Module)

  7. 7. Ground Check

    Ensure that the ground wire for the sensor is not shorted to the vehicle chassis or other wires

  8. 8. Inspect the PCM

    If the wiring and sensor are in good condition, the issue may lie within the PCM. Check for any signs of damage or corrosion on the PCM connectors

  9. 9. If possible, use a scan tool to check for any other related trouble codes that may indicate a broader issue

  10. 10. Clear Codes and Test Drive

    After performing the checks and repairs, clear the trouble codes using an OBD-II scanner

  11. 11. Take the vehicle for a test drive to see if the code reappears. Monitor the vehicle speed reading on the scan tool to ensure it is functioning correctly

  12. 12. Consult a Professional

    If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or technician who has experience with your specific vehicle make and model.Additional Tips: - Always ensure that you are working safely and disconnect the battery when working on electrical components. - Keep in mind that intermittent issues can be harder to diagnose, so thorough testing is essential. By following these steps, you should be able to identify and resolve the issue related to the C1752 code