B1615 – Wiper Rear Disable Switch Circuit Failure

The ODBII code B1615 indicates a malfunction in the rear wiper disable switch circuit, which may prevent the rear wiper from functioning properly.

The severity of ODBII code B1615 is generally considered low to moderate.

Common Causes For: B1614 Wiper Rear Mode Select Switch Circuit Short To Ground

• Faulty rear wiper disable switch
• Damaged wiring or connectors in the circuit
• Short circuit in the wiring
• Open circuit in the wiring
• Corroded connectors
• Malfunctioning body control module (BCM)
• Poor ground connection
• Water intrusion or moisture damage

Common misdiagnosis for B1615 Wiper Rear Disable Switch Circuit Failure

• Faulty rear wiper motor
• Bad wiper relay
• Wiring issues or shorts in the harness
• Malfunctioning body control module (BCM)
• Incorrectly diagnosed switch failure
• Issues with the front wiper system affecting the rear wiper
• Battery or power supply problems affecting the circuit

Common Troubleshooting Steps

The OBD-II code B1615 indicates a problem with the rear wiper disable 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 disable switch. 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. Sometimes, multiple codes can provide more context for the issue.
• Inspect the Rear Wiper Switch: Check the rear wiper switch for any signs of damage or wear. Ensure that it is functioning properly and that there are no loose connections.
• Examine Wiring and Connectors: Inspect the wiring and connectors associated with the rear wiper disable switch. Look for frayed wires, corrosion, or loose connections that could cause a poor electrical signal.
• Test the Rear Wiper Disable Switch: Use a multimeter to test the rear wiper disable switch for continuity. If the switch is faulty, it may need to be replaced.
• Check the Rear Wiper Motor: Ensure that the rear wiper motor is functioning correctly. A malfunctioning motor can sometimes cause issues with the disable switch circuit.
• Inspect the Body Control Module (BCM): The BCM often controls the rear wiper system. Check for any faults in the BCM and ensure that it is receiving the correct signals from the rear wiper switch.
• Look for Ground Issues: Ensure that the ground connections for the rear wiper system are secure and free of corrosion. A poor ground can lead to circuit failures.
• Check Fuses: Inspect the fuses related to the rear wiper system. A blown fuse can interrupt the circuit and cause the code to trigger.
• Perform a Visual Inspection: Conduct a thorough visual inspection of the entire rear wiper system, including the motor, linkage, and any associated components, for any signs of damage or wear.
• Clear the Code and Test Drive: After performing the necessary 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
• Consult a Professional: 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 B1615 code.