Power Mirrors Test

Following are tests that will help to diagnose the hard wired components and circuits of the power mirror system. However, these tests may not prove conclusive in the diagnosis of this system. In order to obtain conclusive testing of the power mirror system, the Programmable Communications Interface (PCI) data bus network and all of the electronic modules that provide inputs to, or receive outputs from the power mirror system components must be checked.

The most reliable, efficient, and accurate means to diagnose the power mirror system requires the use of a DRB scan tool and the proper Diagnostic Procedures. The DRB 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, that the power mirror motors are being sent the proper hard wired outputs, and that the mirror position potentiometers are returning the proper outputs to the door modules for them to perform their power mirror system functions.