WOMS
B code body Medium severity

B1616 Wiper Rear Disable Switch Circuit Open

The OBD2 code B1616 indicates that there is an open circuit in the rear wiper disable switch, meaning the switch is not functioning properly or is disconnected

Definition

The OBD2 code B1616 indicates that there is an open circuit in the rear wiper disable switch, meaning the switch is not functioning properly or is disconnected

Common causes

  • Faulty rear wiper disable switch
  • Open circuit or broken wiring
  • Poor electrical connections
  • Malfunctioning body control module (BCM)
  • Corroded connectors or terminals
  • Blown fuse related to the rear wiper system

Common misdiagnoses

  • Faulty rear wiper motor
  • Defective wiper control module
  • Wiring issues or shorts in the harness
  • Malfunctioning body control module (BCM)
  • Incorrectly diagnosed as a blown fuse
  • Misidentified as a problem with the front wiper system
  • Faulty switch assembly or controls
  • Issues with the vehicle's electrical system or battery

Troubleshooting steps

  1. 1. Visual Inspection

    Check Wiring and Connectors: Inspect the wiring harness and connectors related to the rear wiper disable switch for any signs of damage, corrosion, or loose connections

  2. 2. Look for Shorts or Breaks

    Check for any visible shorts, breaks, or frayed wires in the circuit

  3. 3. Test the Rear Wiper Disable Switch

    Switch Functionality: Use a multimeter to test the rear wiper disable switch for continuity. When the switch is activated, it should show continuity; if not, the switch may be faulty and need replacement

  4. 4. Check for Proper Operation

    Ensure that the switch is functioning correctly and is not stuck in the "off" position

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

    Check for Faulty BCM: The BCM controls various electrical functions in the vehicle, including the rear wiper system. If other related systems are also malfunctioning, the BCM may be at fault

  6. 6. Reprogram or Replace

    If the BCM is suspected to be faulty, it may need to be reprogrammed or replaced

  7. 7. Check for Related Codes

    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

  8. 8. Test Circuit Continuity

    Use a Multimeter: Check the continuity of the circuit from the rear wiper disable switch to the BCM. If there is an open circuit, trace the wiring to find the break

  9. 9. Check Voltage Supply

    Ensure that the circuit is receiving the proper voltage when the switch is activated

  10. 10. Inspect Ground Connections

    Check Ground Points: Ensure that all ground connections related to the rear wiper system are clean and secure. A poor ground can cause various electrical issues

  11. 11. Consult Wiring Diagrams

    Refer to Service Manual: Use the vehicle’s service manual to refer to wiring diagrams for the rear wiper disable switch circuit. This can help identify the correct pin locations and circuit paths

  12. 12. Perform a System Reset

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

  13. 13. Seek Professional Help

    Consult a Mechanic: If the issue persists after performing 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 troubleshooting steps, you should be able to identify and resolve the issue related to the B1616 code