What causes the central locking system of JAC Heyue to only lock but not unlock?
2 Answers
The issue is caused by a malfunction in the vehicle's wiring. Here are the relevant details: 1. Door lock switch: Most central locking switches consist of a master switch and individual switches. The master switch is located on the driver's side door, allowing the driver to lock or unlock all doors; individual switches are installed on other doors for independent control of each door. 2. Door lock actuator: The central locking actuator executes the driver's commands to lock or unlock the doors. Door lock actuators come in three types: electromagnetic, DC motor, and permanent magnet motor. All these mechanisms operate by reversing polarity to perform locking or unlocking actions.
I've repaired many central locking issues on JAC Heyue models, and the problem of the car locking but not unlocking is quite common. It's mostly caused by electronic circuit faults. First, check the fuse. If it's blown, the unlocking current can't pass through, preventing the lock from opening. The fuse is usually located in the fuse box under the steering wheel—find the one corresponding to the central lock and replace it with a new one for testing. Secondly, aging or short-circuited wiring can also cause signal interruptions, such as damaged wires from the main control module to the door lock actuator or oxidized connectors leading to poor contact. The control module itself might also malfunction, with internal components burning out and requiring repair or replacement. Some cases are also related to the remote control's dead battery or incorrect pairing, so try resetting it with the spare key. It's recommended that owners avoid forcing operations to prevent further damage and seek professional repair shop diagnosis as soon as possible for safety.
