B1619 – Wiper Rear Low Limit Input Circuit Failure

The ODBII code B1619 indicates a malfunction in the rear wiper low limit input circuit, suggesting that the system is not receiving the expected signal from the rear wiper switch or sensor.

The severity of ODBII code B1619 is generally considered low to moderate.

Common Causes For: B1618 Wiper Rear Disable Switch Circuit Short To Ground

• Faulty rear wiper motor
• Damaged wiring or connectors in the rear wiper circuit
• Malfunctioning wiper switch
• Failed body control module (BCM)
• Poor ground connection
• Corrosion in electrical connections
• Short circuit in the rear wiper circuit

Common misdiagnosis for B1619 Wiper Rear Low Limit Input Circuit Failure

• Faulty rear wiper motor
• Bad wiper switch
• Damaged wiring or connectors
• Faulty body control module (BCM)
• Incorrectly installed or malfunctioning rear wiper relay
• Issues with the power supply to the rear wiper system

Common Troubleshooting Steps

The OBD-II code B1619 indicates a “Wiper Rear Low Limit Input Circuit Failure.” This code typically relates to issues with the rear wiper system in a vehicle, specifically the low limit input circuit. Here are some common troubleshooting steps to diagnose and potentially resolve this issue:

• Check the Owner’s Manual: Refer to the vehicle’s service manual for specific information related to the rear wiper system and the B1619 code.
• Inspect the Wiper Motor:
• Check the rear wiper motor for any visible damage or corrosion.
• Ensure that the motor is securely mounted and that the electrical connections are clean and tight.
• Examine Wiring and Connectors:
• Inspect the wiring harness and connectors leading to the rear wiper motor for any signs of damage, fraying, or corrosion.
• Look for any loose or disconnected wires that could affect the circuit.
• Test the Rear Wiper Switch:
• Check the rear wiper switch for proper operation. A faulty switch can send incorrect signals to the wiper motor.
• Use a multimeter to test the switch for continuity when activated.
• Check for Ground Issues:
• Ensure that the rear wiper motor has a good ground connection. A poor ground can lead to circuit failures.
• Use a multimeter to test the ground connection.
• Inspect the Fuse:
• Check the fuse related to the rear wiper system. A blown fuse can cause the system to malfunction.
• Replace any blown fuses and retest the system.
• Scan for Additional Codes:
• Use an OBD-II scanner to check for any additional trouble codes that may provide more context to the issue.
• Address any other codes that may be present.
• Perform a Visual Inspection:
• Look for any signs of water intrusion or damage in the area where the rear wiper motor is located.
• Check for any obstructions that may prevent the wiper from operating correctly.
• Test the Rear Wiper Operation:
• After checking all components, test the rear wiper to see if it operates correctly.
• If it does not work, further testing of the motor and circuit may be necessary.
• Consult a Professional:
• If the issue persists after performing these steps, it may be best to consult a professional mechanic or technician who can perform more advanced diagnostics. By following these steps, you should be able to identify the cause of the B1619 code and take appropriate action to resolve the issue.