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A paragraph Germany 2002 Audi A84.2L car, because Drive Members complained that too close to the repair headlight range. Initial examinations showed that the central information dashboard display prompt at the beginning of headlamps headlamps automatically when the angle control system failure, headlamps to emergency mode at this time that the range of recent work. Fault diagnosis and Service Vehicle headlamps equipped with the automatic control system point of view has the following main parts: 1, headlight angle control motors, each lamp has a built; 2, the left anterior Car body Height Sensor, Mounted on the left front wheel at the top of the car body, by connecting to the link front suspension arm to sense the height of front suspension; 3, left rear ride height sensor, for sensing the height of rear suspension; 4 headlamps Auto angle control module, installed in the co-pilot side of the seat belt below the scroll next to the B pillar, left front and left rear to handle the body from the load height sensor signal, turn signals and headlights from ABS The speed control module signals processed by the internal processor, two headlamps angle control drive motor to load the vehicle before and after the change, and accelerating the vehicle starting to adjust the headlights of the irradiation angle. Failure of the system into the dashboard of a fault signal activation, fault indication, while making two front headlights to the latest range of work. The control module has an internal memory failure, self-diagnostic function, system failure can be stored in the fault code to facilitate maintenance. First enter the address code 55 with VAG1552 automatic headlight control system point of view, input No. 02 queries fault memory, displays the following error code: 00 774 1 Rearleftvehiclelevelsender? G76 and 01539? Headlightsnotset, said the left rear ride height sensor failures and G76 headlights not set. According to fault code prompt, enter the function first reads the data block No. 08, 002 sets of data to read the second choice for the left rear area of the body height sensor output voltage, shown as close to 0.13V, the normal value of 0.5 ~ 4.5V should be rooms. It can determine left rear ride height sensor G76 or its associated circuit. After the measurement of left rear vehicle access to circuit height sensor G76 power supply and ground lines between the 5V power supply, and the sensor output signal line and the control module 16-pin turn, this can determine the relevant circuit G76 normal, sensor damage. G76 replaced left rear ride height sensor fault code 00774 is cleared after. Next job is to set the lamp. First car stopped at the level of the road, connected to VAG1552, the car can not take people at this time. No. 04 and then input the basic settings, select 001 group function, then you can manually adjust the headlight adjustment screws so that the irradiation angle of headlamps standard value. Final choice of 002 group function, then the adjustment of position before the headlights were off the system memory. After more than car headlamps angle control system is working automatically, thus troubleshooting.
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