B1552 – Decklid Release Circuit Open

The ODBII code B1552 indicates that there is an open circuit in the decklid release system, meaning the electrical connection for the trunk release is interrupted or not functioning properly.

The severity of ODBII code B1552 Decklid Release Circuit Open is generally considered moderate.

Common Causes For: B1551 Decklid Release Circuit Failure

• Faulty decklid release switch
• Open or damaged wiring in the circuit
• Poor ground connection
• Malfunctioning body control module (BCM)
• Blown fuse in the decklid release circuit
• Corroded connectors or terminals

Common misdiagnosis for B1552 Decklid Release Circuit Open

• Faulty decklid release switch
• Malfunctioning body control module (BCM)
• Broken or damaged wiring harness
• Defective decklid latch assembly
• Issues with the vehicle’s central locking system
• Faulty key fob or remote entry system
• Low battery voltage or weak battery
• Corroded connectors or terminals

Common Troubleshooting Steps

The OBD-II code B1552 indicates a problem with the decklid (trunk) release circuit, specifically that the circuit is open. This can be caused by various issues, including wiring problems, faulty switches, or issues with the body control module (BCM). Here are some common troubleshooting steps to diagnose and resolve the issue:

• Check the OBD-II Scanner:
• Use an OBD-II scanner to confirm the code and check for any additional codes that may provide more context.
• Inspect the Wiring and Connectors:
• Visually inspect the wiring and connectors related to the decklid release circuit. Look for signs of damage, corrosion, or loose connections.
• Pay special attention to the wiring harness that runs to the trunk area.
• Test the Decklid Release Switch:
• Check the functionality of the decklid release switch. Use a multimeter to test for continuity when the switch is pressed.
• If the switch is faulty, replace it.
• Check the Decklid Release Actuator:
• Inspect the decklid release actuator for proper operation. If the actuator is not functioning, it may need to be replaced.
• Test the Circuit:
• Use a multimeter to test the voltage and ground at the decklid release actuator and switch. Ensure that the circuit is receiving power and that the ground is solid.
• If there is no voltage or ground, trace the wiring back to the BCM or fuse box to identify any breaks or shorts.
• Inspect Fuses:
• Check the relevant fuses associated with the decklid release circuit. Replace any blown fuses.
• Check the Body Control Module (BCM):
• If all other components are functioning correctly, the issue may lie with the BCM. Check for any software updates or faults in the BCM.
• If necessary, reprogram or replace the BCM.
• Clear the Code and Test Drive:
• After performing repairs, clear the code using the OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Consult Repair Manual:
• Refer to the vehicle’s repair manual for specific wiring diagrams and troubleshooting procedures related to the decklid release circuit.
• Seek Professional Help:
• If the issue persists after performing these steps, consider seeking assistance from a professional mechanic or automotive technician who has experience with electrical systems. By following these steps, you should be able to identify and resolve the issue causing the B1552 code.