B1824 – Wiper Rear Park Sense Input Circuit Short To Battery

The ODBII code B1824 indicates a short circuit in the rear wiper park sense input circuit, meaning that the circuit is receiving voltage directly from the battery instead of the expected signal, which can affect the proper functioning of the rear wiper system.

The severity of ODBII code B1824 is moderate.

Common Causes For: B1823 Wiper Rear Park Sense Input Circuit Open

• Shorted wiring or connectors
• Faulty rear wiper motor
• Damaged or corroded ground connections
• Malfunctioning body control module (BCM)
• Improperly installed or damaged rear wiper switch
• Water intrusion or moisture in electrical connections
• Faulty rear wiper park switch

Common misdiagnosis for B1824 Wiper Rear Park Sense Input Circuit Short To Battery

• Faulty rear wiper motor
• Damaged wiring or connectors
• Malfunctioning body control module (BCM)
• Incorrectly installed or defective rear wiper switch
• Short circuit in the wiring harness
• Faulty ground connection
• Issues with the rear wiper relay

Common Troubleshooting Steps

The OBD-II code B1824 indicates a problem with the rear wiper park sense input circuit, specifically a short to battery. This can affect the operation of the rear wiper system. Here are some common troubleshooting steps to diagnose and resolve this issue:

• Visual Inspection:
• Check the wiring and connectors associated with the rear wiper motor and park sense input circuit. Look for any signs of damage, fraying, or corrosion.
• Inspect the rear wiper switch for any physical damage or wear.
• Check for Short Circuits:
• Use a multimeter to check for continuity in the wiring harness. Look for any shorts to battery voltage (12V) in the park sense input circuit.
• Disconnect the rear wiper motor and check the wiring harness for shorts to ground or battery.
• Test the Rear Wiper Motor:
• If the wiring appears to be in good condition, test the rear wiper motor itself. Apply direct battery voltage to the motor to see if it operates correctly.
• If the motor does not operate, it may need to be replaced.
• Inspect the Park Sense Input Circuit:
• Check the park sense input circuit for proper voltage and ground. Use a multimeter to measure the voltage at the connector while the ignition is on.
• Compare the readings to the specifications in the vehicle’s service manual.
• Check the Body Control Module (BCM):
• The BCM may be responsible for controlling the rear wiper system. Check for any fault codes related to the BCM and inspect its connections.
• If necessary, reprogram or replace the BCM according to manufacturer specifications.
• Clear Codes and Test:
• After performing the above checks and repairs, clear the trouble codes using an OBD-II scanner.
• Test drive the vehicle to see if the code returns. Monitor the rear wiper operation to ensure it functions correctly.
• Consult Service Manual:
• Refer to the vehicle’s service manual for specific wiring diagrams and troubleshooting procedures related to the rear wiper system.
• Seek Professional Help:
• If the issue persists after performing these steps, consider seeking assistance from a qualified mechanic or dealership for further diagnosis. By following these steps, you should be able to identify and resolve the issue related to the B1824 code.