Power Locks: Testing and Inspection: Diagnosis and Testing

The most reliable, efficient, and accurate means to diagnose the power lock system requires the use of a DRBIII(R) scan tool and the proper Diagnostic Procedures. The DRBIII(R) 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 relays for them to perform their power lock system functions.

For information regarding Trouble Code Diagnostic Charts for this system, please refer to Body Control Module testing. U Code Charts