WOMS
B code body Medium severity

B2115 Rear Washer Input Short to Ground

The OBD2 code B2115 indicates a short circuit in the rear washer input circuit, meaning that the signal from the rear washer switch is being incorrectly grounded, which can prevent the rear washer from functioning...

Definition

The OBD2 code B2115 indicates a short circuit in the rear washer input circuit, meaning that the signal from the rear washer switch is being incorrectly grounded, which can prevent the rear washer from functioning properly

Common causes

  • Damaged wiring or connectors
  • Short circuit in the rear washer input circuit
  • Faulty rear washer switch
  • Malfunctioning rear washer motor
  • Corroded or loose connections
  • Water intrusion in electrical components
  • Faulty body control module (BCM)

Common misdiagnoses

  • Faulty rear washer motor
  • Damaged wiring or connectors
  • Malfunctioning body control module (BCM)
  • Shorted wiring harness
  • Faulty switch or control for the rear washer
  • Grounding issues in the electrical system
  • Incorrectly diagnosed water pump issues

Troubleshooting steps

  1. 1. Check the Vehicle's Manual

    Refer to the vehicle's service manual for specific information related to the B2115 code, including wiring diagrams and component locations

  2. 2. Visual Inspection

    Inspect the wiring and connectors associated with the rear washer system. Look for signs of damage, corrosion, or loose connections

  3. 3. Check the rear washer switch for any visible issues

  4. 4. Test the Rear Washer Switch

    Use a multimeter to test the rear washer switch for proper operation. Ensure that it is functioning correctly and not stuck in the "on" position

  5. 5. Check for Short Circuits

    With the multimeter, check for continuity between the rear washer input wire and ground. If there is continuity, it indicates a short to ground

  6. 6. Inspect the wiring harness for any pinched or frayed wires that could be causing a short

  7. 7. Inspect the Rear Washer Motor

    If applicable, check the rear washer motor for any signs of failure or short circuits. Disconnect the motor and test the wiring harness for continuity to ground

  8. 8. Scan for Additional Codes

    Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues

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

    The BCM may be responsible for controlling the rear washer system. Inspect the BCM for any faults or issues. If necessary, perform a reset or reprogramming

  10. 10. Test the Circuit

    If you have access to a wiring diagram, test the circuit from the rear washer switch to the BCM and from the BCM to the rear washer motor. Look for any breaks or shorts in the wiring

  11. 11. Repair or Replace Components

    Based on your findings, repair any damaged wiring or connectors. If the rear washer switch or motor is faulty, replace them as needed

  12. 12. Clear the Code and Test Drive

    After making repairs, clear the trouble code using the OBD-II scanner and take the vehicle for a test drive to see if the code returns.1

  13. 13. Seek Professional Help

    If the issue persists after following these steps, consider seeking assistance from a professional mechanic or automotive technician who has experience with electrical systems. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the B2115 code