B1824: Wiper Rear Park Sense Input Circuit Short To Battery

Definition

The OBD2 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

Common causes

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 misdiagnoses

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

Troubleshooting steps

1. Visual Inspection
2. 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
3. Inspect the rear wiper switch for any physical damage or wear
4. Check for Short Circuits
5. 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
6. Disconnect the rear wiper motor and check the wiring harness for shorts to ground or battery
7. Test the Rear Wiper Motor
8. 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
9. If the motor does not operate, it may need to be replaced
10. Inspect the Park Sense Input Circuit
11. 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
12. Compare the readings to the specifications in the vehicle’s service manual
13. Check the Body Control Module (BCM)
14. The BCM may be responsible for controlling the rear wiper system. Check for any fault codes related to the BCM and inspect its connections
15. If necessary, reprogram or replace the BCM according to manufacturer specifications
16. Clear Codes and Test
17. After performing the above checks and repairs, clear the trouble codes using an OBD-II scanner
18. Test drive the vehicle to see if the code returns. Monitor the rear wiper operation to ensure it functions correctly
19. Refer to the vehicle’s service manual for specific wiring diagrams and troubleshooting procedures related to the rear wiper system
20. Seek Professional Help
21. 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

Definition

Common causes

Common misdiagnoses

Troubleshooting steps

1. Visual Inspection

2. 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

3. Inspect the rear wiper switch for any physical damage or wear

4. Check for Short Circuits

5. 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

6. Disconnect the rear wiper motor and check the wiring harness for shorts to ground or battery

7. Test the Rear Wiper Motor

8. 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

9. If the motor does not operate, it may need to be replaced

10. Inspect the Park Sense Input Circuit

11. 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

12. Compare the readings to the specifications in the vehicle’s service manual

13. Check the Body Control Module (BCM)

14. The BCM may be responsible for controlling the rear wiper system. Check for any fault codes related to the BCM and inspect its connections

15. If necessary, reprogram or replace the BCM according to manufacturer specifications

16. Clear Codes and Test

17. After performing the above checks and repairs, clear the trouble codes using an OBD-II scanner

18. Test drive the vehicle to see if the code returns. Monitor the rear wiper operation to ensure it functions correctly

19. Refer to the vehicle’s service manual for specific wiring diagrams and troubleshooting procedures related to the rear wiper system

20. Seek Professional Help

21. 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