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Chery QQ Service Manual BCM Computer Control System
determined, replacement should be made. If motor or wiring is defective, power rearview mirror can not be operated in both directions; if the wiring is broken, no current flows through the motor, so the power rearview mirror cannot turn in any direction. If the coil or the brush of motor is defective, the power rearview mirror cannot turn in any direction either. It is impossible that the motor rotates only in one direction.
※Reference: if the electric control device that changes rotating direction of the motor (power window, motor circuit, power rearview mirror, electric driven seat etc. ) can only operate in one direction, it is mainly because the defective switch. (2) Power rearview mirror on right or left side doesn’t work The causes may be the defective switches of the right or left side, or may be defective wiring or motor on the side that power rearview mirror doesn’t work.
① Remove the interior door panel on the defective side (to check the power rearview mirror connector ) ② Remove power rearview mirror wiring connector
③ Inspection of power rearview mirror on the left side: if the right/left angle can not be adjusted, after removing the wiring connector, connect a universal meter between the yellow wire and black-red wire, no matter on the right or the left side, push the angle adjusting switch down, and voltage of 12V will be shown (digital display). If voltage is shown, the switch and wiring are normal, the power rearview mirror should be replaced; if no voltage is detected, check if the wiring is broken. If the wiring is not broken, defective switch can be determined. If the up/down angle can not be adjusted, connect the universal meter between the green wire and black-red wire, make the inspection as above described and find out where is defective.
④ Inspection of power rearview mirror on the right side: The inspection and decision are made in the same way as that of the left power rearview mirror, but the color of the wiring should be noted. if the right/left angle can not be adjusted, connect the universal meter between the grey wire and black-red wire; if the up/down angle can not be adjusted, connect the universal meter between the blue wire and black-red wire.
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Reference: the color of wiring here mentioned is corresponding to that on the door wiring side, not to that on the power rearview mirror motor side.
(3) Right/left angle or up/down angle can not adjusted on the both sides.
Almost all of this kind of problems is caused by defective switch. If the problem is not disappeared after the switch is replaced, it may be resulted from the short cut between the motor wiring and car body. After turning on the switch on, if the wiring that is short with car body is connected to the positive pole, the switch is cut off due the high current - 124 - |