B1611 – Wiper Rear Mode Select Switch Circuit Failure

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

The severity of ODBII code B1611 is generally considered moderate.

Common Causes For: B1610 Illuminated Entry Input Short Circuit To Ground

• 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 misdiagnosis for B1611 Wiper Rear Mode Select Switch Circuit Failure

• 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

Common Troubleshooting Steps

The OBD-II code B1611 indicates a problem with the rear wiper mode select switch circuit. This code is typically associated with vehicles that have a rear wiper system, and it suggests that there is a malfunction in the circuit that controls the rear wiper’s operation. Here are some common troubleshooting steps to diagnose and potentially resolve the issue:

• 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.
• Inspect the Rear Wiper Switch: Examine the rear wiper mode select switch for any visible damage or wear.
• Ensure that the switch is functioning properly by testing it with a multimeter to check for continuity when the switch is activated.
• 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.
• Look for frayed wires or broken connectors that could interrupt the circuit.
• 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.
• If the motor does not work when powered directly, it may need to be replaced.
• Examine the Fuse: Check the fuse related to the rear wiper system. A blown fuse can cause the circuit to fail.
• Replace any blown fuses and retest the system.
• 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.
• If necessary, reprogram or replace the BCM according to manufacturer specifications.
• Check Ground Connections: Ensure that all ground connections related to the rear wiper circuit are secure and free of corrosion.
• A poor ground can lead to circuit failures.
• 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.
• 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.
• 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
• 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.