Mondeo meter displays the battery voltage is low

A mileage of only 1500km 2.0AT Mondeo sedan . Users report: After opening the door to enter the vehicle and found that the display on the instrument display battery voltage is low, but the engine is also able to start normally.
After receiving the car : test validation failure, the vehicle everything is normal. Customers often reflect the failure to mention the car from after , and almost every time you open the door meter screen will be displayed when the SC100 Master Digital Car Battery Analyzer Tool voltage is low, but because of this failure does not affect the smooth start of the engine , so there is no maintenance for the first time into the plant , the car has since repeated this failure into the plant maintenance, fault failed excluded. In addition, customers also reflected , generally in about 1h after stopping failures to appear. 1h decided to park the vehicle and then checked.
During maintenance personnel access to a car maintenance records , that car is the 3rd because of failure into the plant overhaul . After and before servicing the vehicle maintenance personnel to communicate that, the vehicle for the first time into the plant , the fault does not appear, maintenance personnel with a battery tester to detect , display battery normal ; connection IDS detects a fault code , trouble code is stored ; read related data streams were also normal , because it is a new car, vehicle maintenance staff that is leading to lack of battery power when doing the decorating , so give the car to charge the battery will be returned to the customer , but the customer drive home after the first The next morning found the fault persists, but due to the tight schedule of customers , the vehicle can normally start , it did not immediately come to repair. Again after the vehicle into vas 5054a the plant maintenance personnel to detect a more detailed, but still found no problems , desperation had to replace the battery , however , drive home that night after the failure of customers appeared again.
Parked about 1h , the maintenance staff opened the door, turned the instrument screen displays battery voltage is low. After analysis, the preliminary view that the cause may be a battery failure, charging system failure , instrumentation (IC) or PCM failure, system failure , such as other vehicles .
Principle from simple to complex , and maintenance personnel decided by one point to the failure investigation . While the battery is new for , but the maintenance staff or with battery tester were tested , the results show Auto Key Chip the battery properly. Connection IDS read fault codes , trouble code is stored ; reads the data stream , and there is no exception. Taking into account the car's battery is equipped with battery detection sensor , which will not be part of the problem? When preparing and test drive the car battery replacement sensor , another car into the plant because of a similar overhaul of the failure . After careful inquiry found fault phenomenon is very similar.
Comparing two cars and found that two cars were the standard version of the 2.0T models, not with the original car DVD, while the two vehicles are equipped with the original car CD souped DVD. Consultation with other models of vehicles with no modifications , have not had a similar failure. Is it caused by the failure converted DVD ? Then the converted DVD demolition , in exchange for the original CD, after many days of trial , the fault does not reappear , thus can be determined , the failure was caused by a vehicle converted DVD 's .
Summary: Since then , have also received multiple cars subsection 2.0T models due to modifications caused by the failure of the DVD case . After the Ministry of Communication and car decorating and carefully review the relevant information after that , this is due to the modification of the original car DVD with protocol mismatch caused .