Trouble Analysis
Contents
1. Model QQ 7110 Trouble Category Electrical Road Mileage 2000KM TC Possible Trouble s The wiper blade canjt return back to its original position and stays at the intermediate position of windscreen at all times after the wiper is used Trouble Analysis QQjs wiper has 3 gears According to the fault symptom it can be determined that the wiperjs motor and switch shall have no problem Use a multimeter to check the circuit and find there is no abnormal symptom Check the relay and find it is also normal Readjust the position of wiper blade and find it still stays at the intermediate position of windscreen and canjt return back to its original position The owner discloses that the wiper motor was repaired at a roadside service station It is supposed whether the dead point position of link mechanism isnjt adjusted well after the wiper is removed during the maintenance of motor Subsequently check the wiper again and find by accident that there is a slip symptom between the wiper motor and four link mechanism Carefully check them and find the anti slip gears on the motor are already worn Machine the gears again install the motor on wiper and then test the vehicle and find the trouble disappears The fault position is shown in the following figure Troubleshooting Readjust the link mechanism
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