Door Lock Motor

The most reliable, efficient, and accurate means to diagnose the power lock system requires the use of a DRBIII® scan tool. The DRBIII® scan tool can provide confirmation that the PCI data bus is functional, that all of the electronic modules are sending and receiving the proper messages on the PCI data bus, and that the power lock motors are being sent the proper hard wired outputs by the door modules for them to perform their power lock system functions. See BODY CONTROL MODULES - LIBERTY article.