B1616 – Wiper Rear Disable Switch Circuit Open

The ODBII 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.

The severity of ODBII code B1616 Wiper Rear Disable Switch Circuit Open is generally considered moderate.

Common Causes For: B1615 Wiper Rear Disable Switch Circuit Failure

• 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 misdiagnosis for B1616 Wiper Rear Disable Switch Circuit Open

• 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

Common Troubleshooting Steps

The OBD-II code B1616 indicates a problem with the rear wiper disable switch circuit, specifically that the circuit is open. This can be caused by various issues, including wiring problems, switch malfunctions, or issues with the body control module (BCM). Here are some common troubleshooting steps to diagnose and resolve the issue:

• 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.
• **Look for Shorts or Breaks: Check for any visible shorts, breaks, or frayed wires in the circuit.
• 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.
• **Check for Proper Operation: Ensure that the switch is functioning correctly and is not stuck in the “off” position.
• 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.
• **Reprogram or Replace: If the BCM is suspected to be faulty, it may need to be reprogrammed or replaced.
• 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.
• 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.
• **Check Voltage Supply: Ensure that the circuit is receiving the proper voltage when the switch is activated.
• 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.
• 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.
• 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.
• 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.