WOMS
B code body Low severity

B1479 Wiper Washer Fluid Level Sensor Circuit Failure

The OBD2 code B1479 indicates a malfunction in the wiper washer fluid level sensor circuit, suggesting that the sensor is not functioning properly or there is a wiring issue

Definition

The OBD2 code B1479 indicates a malfunction in the wiper washer fluid level sensor circuit, suggesting that the sensor is not functioning properly or there is a wiring issue

Common causes

  • Faulty wiper washer fluid level sensor
  • Damaged wiring or connectors
  • Short circuit in the circuit
  • Open circuit in the circuit
  • Corrosion at the sensor or connector
  • Low washer fluid level
  • Faulty body control module (BCM)

Common misdiagnoses

  • Faulty wiper washer fluid level sensor
  • Wiring issues or shorts in the circuit
  • Faulty body control module (BCM)
  • Incorrect fluid level readings due to contamination
  • Malfunctioning wiper control switch
  • Issues with the vehicle's electrical system or grounding
  • Software glitches in the vehicle's computer system

Troubleshooting steps

  1. 1. Check the Vehicle's Manual

    Refer to the vehicle's service manual for specific information regarding the washer fluid level sensor and its circuit

  2. 2. Visual Inspection

    Wiring and Connectors: Inspect the wiring harness and connectors associated with the washer fluid level sensor for any signs of damage, corrosion, or loose connections

  3. 3. Sensor Condition

    Check the physical condition of the washer fluid level sensor. Look for cracks, breaks, or any signs of wear

  4. 4. Test the Washer Fluid Level Sensor

    Resistance Check: Use a multimeter to measure the resistance of the washer fluid level sensor. Compare the readings to the specifications in the service manual

  5. 5. Functionality Test

    If possible, manually trigger the sensor (by simulating a full or empty tank) to see if the vehicle's system responds accordingly

  6. 6. Inspect the Washer Fluid Reservoir

    Ensure that the washer fluid reservoir is not clogged or damaged. A blockage can prevent the sensor from functioning properly

  7. 7. Check for Short Circuits or Open Circuits

    Use a multimeter to check for continuity in the wiring leading to the sensor. Look for any shorts to ground or open circuits that could cause the sensor to fail

  8. 8. Scan for Additional Codes

    Use an OBD-II scanner to check for any other related trouble codes that may provide additional context or indicate a broader issue

  9. 9. Clear the Code

    After performing the checks and repairs, clear the trouble code using an OBD-II scanner and take the vehicle for a test drive to see if the code returns

  10. 10. Replace the Sensor (if necessary)

    If the sensor is found to be faulty after testing, replace it with a new one. Ensure that the replacement part is compatible with your vehicle

  11. 11. Check the Body Control Module (BCM)

    If all else fails, the issue may lie within the BCM or the software that controls the washer fluid level sensor. Consult a professional for further diagnosis

  12. 12. Consult a Professional

    If you are unable to resolve the issue after these steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these steps, you should be able to identify and address the cause of the B1479 code effectively