These models come with Smart Junction Box (SJB), or Body Control Module (BCM), integrating many systems to one control module; diagnostics with the help of a professional grade scan tool are simple and accurate. The SJB or BCM performs control activities such as; doors and windows including, door lock and power window, ignition lock and security system, illumination including interior lights, Daytime Running Lights,
Horn, windshield wipers, heating/air conditioning, and power mirror. If this occurs, it is possible to take the vehicle to the service department of the manufacturers or any automotive repair center. The electric rear view mirrors utilize two motors for adjustments: This requires a unique joint for vertical movement and another one for the horizontal movement. The control switch also has a selector where voltage can be sent to the side mirror left or the side mirror right. With the ignition in the ACC position turn off the engine, and then lower the windows, and perform a test on all functions for both mirrors while the sound of the electric motors can be heard. If the motors are audible and the mirror glass does not move then there may be a problem with an assembly or motor inside the mirror glass which can only be replaced as an assembly. In case where the mirrors do not operate and no sound is produced, check for the fuses. Should the fuses be good, then, the mirror control switch should be taken out, and its continuity taken to a qualified shop. Further, there are the ground connections to check. If the mirror is still not functional, pull down the mirror wires, as a DC voltage should be read. If, in each switch position, there is no voltage, check for opens and shorts in the circuit between the mirror and control switch. In case voltage is identified, the mirror should be disconnected and tested else on the vehicle with the help of jumper wires, however, should fail this test, then it should be replaced.