How To Diagnose Door Lock Actuator

Helpful guide on diagnosing power door lock problems with the passenger multiplex control unit and the door lock actuators.

How to diagnose door lock actuator.

2004 honda odyssey ex passenger m. Then use your test light or digital meter to check for power and ground at the connector when you operate the lock unlock switch. If the actuators have any sort of internal or wiring issue it may cause them to rapidly lock and unlock unexpectedly or cause them to function intermittently. A quick test can be performed from the driver s seat by using the electric lock button.

Unplug the door lock actuator electrical connector. If the unlock button fails to unlock the door you can rule out the remote and take a long look at the actuator. You should see the voltage polarity toggle with each switch activation. A rod connects the actuator to the latch and another rod connects the latch to the knob that sticks up out of the top of the door.

On manual locks the locking function operates by pushing or pulling on the door lock. Power door locks behave erratically. How a door lock actuator works. The concept of a door lock actuator works great until it doesn t.

Door lock actuator problems use to be simple to diagnose and repair. In some cars the door lock actuator is positioned below the latch. Unusual noises coming from inside the door. Usually a bad or failing power door lock actuator will produce a few symptoms that can notify the driver of an issue that should be serviced.

Power door locks do not function. Car door lock actuators are designed to lock and unlock a door without the effort of pulling on a cable and rod. A metal rod then made its way to the door latch to operate the lock mechanism. Pictured on the right is a typical door lock actuator they installed on automobiles 20 years ago.

In the old days they remained a separate component mounted to the door shell. Door lock systems operate the actuator by toggling positive negative voltage to the actuator. The symptoms will get worse.