Sinotruk HOWO TH7 China VI Door Lock Assembly

1. Basic Part Information

• Part Name: Door Lock Assembly

• Applicable Models: Specifically designed for Sinotruk HOWO TH7 models (China VI emission standard).

• Appearance Features:

  • Main Body: Composed of a black engineering plastic housing with internal metal latch(es) and transmission mechanism.

  • Wiring Connectors: Multiple black wiring harnesses with plastic connectors (at least three visible in the image) for connecting to the vehicle's central locking system, remote keyless entry, and door status sensors.

  • Mechanical Linkage: A metal lever or linkage interface on one side connects to the interior door handle, exterior door handle, and door actuator.

2. Function & Role

• Door Locking & Unlocking: Responds to signals from the remote key fob, door-mounted buttons, or mechanical key to drive an internal motor or solenoid — enabling automatic door locking/unlocking.

• Security: Serves as the primary physical barrier against unauthorized entry, working in conjunction with the vehicle's overall anti-theft system.

• Status Monitoring: Built-in sensors provide real-time feedback to the body control module (BCM) regarding door open/closed and locked/unlocked status — displayed on the instrument panel for safe driving.

• Central Locking Integration: Supports one-button central locking/unlocking for all doors, enhancing convenience.

3. Working Principle (Brief)

• Electronic Control: Pressing the "lock" button on the remote key fob sends a signal to the body control module, which activates a small motor or solenoid inside the lock assembly — moving the latch to lock or unlock.

• Mechanical Backup: If the electrical system fails or battery is dead, a traditional mechanical key can still unlock the door.

• Anti-Pinch & Protection (Optional): Some high-end configurations include an anti-pinch feature: if the system detects excessive resistance when closing, it automatically reverses the motor to prevent injury or door damage.