What is the repair method for car central locking system?
2 Answers
Most cases of central locking system failure are caused by circuit breakage, so it is necessary to inspect the wiring. If there is an issue with the wiring, repairing the circuit will suffice. If the internal wiring of the central locking system is severely damaged, the only option is to replace the door lock relay to restore the locking and unlocking functions of the central locking system.
I've got plenty of experience with this! Last time when all my car locks suddenly failed, I managed to fix them myself through trial and error. Don't rush to remove the door panel yet - try some basic troubleshooting first: give each door lock actuator a few firm taps, as sometimes they just get stuck. Then test with your spare remote to rule out a dead key fob battery. Dig out the manual to locate the fuse box and specifically check fuses labeled "Door Lock" or "POWER LOCK". If these steps don't solve it, you'll need a multimeter. When removing the door trim panel, be extremely careful with plastic clips - I broke three last time. Measure the two wires to the lock actuator motor - you should see alternating 12V when pressing the lock/unlock buttons. No voltage indicates wiring or control module issues, while voltage without movement means the motor needs replacement. Replacing the motor yourself isn't difficult; they cost around 100 yuan online. When removing the old motor, remember to mark wire positions with a marker pen. Final reminder: always test the child safety lock function after repairs!
