These models are fitted with Body Control Module (BCM) that interconnects multiple systems for easy and accurate diagnosing and it can only be diagnosed using a professional scan tool. The BCM also controls the door lock, the power windows, ignition lock and security system, interior lights, Daytime Running Light, horn, windshield wipers, heating and air conditioning system and power rear view mirrors. In general, any problem that you encounter is advised to be brought to an automotive repair shop for diagnosis. For adjustment, the electric rear view mirrors use two motors and some vehicles come with memory mirrors linked with the power seat memory unit as well as the BCM. In case of problems, it is suggested that the owner should consult either an authorized repair center or a local distributor. The switch controls the voltage being supplied to the left or right side mirror, and with the ignition initially set to the ACC position with the engine off, the windows should be opened while testing the mirror control switch through all the positions. Check the sound of the motors; if one can hear the motor's whirring but cannot see the mirror glass moving, then the drive mechanism is likely to be worn out, and the mirror is going to need replacement. In case the mirrors don't and there is no sound at all, it becomes important to check fuses. If the fuses are good then the mirror control switch should be taken out in order to test continuity and ground connections should be checked. If the mirror is still out of order, then the mirror should be disconnected so that the investigator could check presence of voltage at the wires. If there is no voltage in each switch position, then, opens and shorts between the mirror and control switch are to be checked. If the mirror does not operate, another remedy that can help to discover the break in the wiring harness, all this should be done while hold switch and opening and closing the door. If voltage is present, the mirror should be tested off the vehicle with jumper wires, be careful to use the right leads in order not to damage the mirror drive motors and it should be replaced if it fails the test.