WOMS
B code body Medium severity

B1611 Wiper Rear Mode Select Switch Circuit Failure

The OBD2 code B1611 indicates a malfunction in the rear wiper mode select switch circuit, which may affect the operation of the rear wiper system

Definition

The OBD2 code B1611 indicates a malfunction in the rear wiper mode select switch circuit, which may affect the operation of the rear wiper system

Common causes

  • Faulty rear wiper mode select switch
  • Damaged wiring or connectors
  • Short circuit in the circuit
  • Open circuit in the circuit
  • Corroded terminals
  • Malfunctioning body control module (BCM)
  • Poor ground connection

Common misdiagnoses

  • Faulty rear wiper motor
  • Defective wiper relay
  • Wiring issues or shorts in the harness
  • Malfunctioning body control module (BCM)
  • Incorrectly diagnosed front wiper issues
  • Problems with the switch assembly itself
  • Issues with the vehicle's electrical system or battery
  • Faulty ground connections

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are multiple issues

  2. 2. Inspect the Rear Wiper Switch

    Examine the rear wiper mode select switch for any visible damage or wear

  3. 3. Ensure that the switch is functioning properly by testing it with a multimeter to check for continuity when the switch is activated

  4. 4. Check Wiring and Connectors

    Inspect the wiring harness and connectors associated with the rear wiper switch for any signs of damage, corrosion, or loose connections

  5. 5. Look for frayed wires or broken connectors that could interrupt the circuit

  6. 6. Test the Rear Wiper Motor

    Verify that the rear wiper motor is functioning correctly. You can do this by applying direct power to the motor to see if it operates

  7. 7. If the motor does not work when powered directly, it may need to be replaced

  8. 8. Examine the Fuse

    Check the fuse related to the rear wiper system. A blown fuse can cause the circuit to fail

  9. 9. Replace any blown fuses and retest the system

  10. 10. Inspect the Body Control Module (BCM)

    The BCM may be responsible for controlling the rear wiper operation. Check for any faults or issues with the BCM

  11. 11. If necessary, reprogram or replace the BCM according to manufacturer specifications

  12. 12. Check Ground Connections

    Ensure that all ground connections related to the rear wiper circuit are secure and free of corrosion

  13. 13. A poor ground can lead to circuit failures

  14. 14. Perform a Visual Inspection

    Look for any signs of water intrusion or damage in the area where the rear wiper components are located, as moisture can cause electrical issues

  15. 15. Consult Wiring Diagrams

    Refer to the vehicle’s wiring diagrams to trace the circuit and identify any other components that may be involved in the rear wiper operation

  16. 16. Clear Codes and Test Drive

    After performing repairs, clear the trouble codes and take the vehicle for a test drive to see if the code returns.1

  17. 17. Seek Professional Help

    If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the B1611 code. Always refer to the vehicle's service manual for specific procedures and specifications