involves models: SAIC Roewe R750i car.
Content Bulletin: When using GPS navigation, sometimes significant deviation from the current position of the vehicle and the physical location of the navigation screen. Some maintenance personnel for maintenance experience less GPS navigation system, in this brief description of repair methods such failure.
Roewe R750i car GPS navigation and autonomous navigation by two kinds of ways of combining a vehicle navigation. GPS navigation satellite signal receiving means (3 or more) by the GPS antenna, transmits a corresponding signal to the navigation host, the host calculates the latitude and longitude coordinates of the navigation of the vehicle, speed, and time information based on the received satellite navigation message. It refers to the autonomous navigation positioning accuracy to improve vehicle navigation, positioning by the vehicle speed sensor and a gyro sensor. Road navigation host data processing and navigation discs can store data and other relevant information matches the information obtained by processing eventually appear in the DVD display. When the car driving to the next because the underground tunnels or high-rise buildings such as cover or a fault at not being captured GPS satellite signal, only the autonomous navigation function. If the host for a long time can not receive satellite navigation signals, the navigation system will be a long time to self-navigate, leading to navigate deviation can not be corrected gradually accumulate, eventually navigation deviation large. The following inspection method can not receive a satellite navigation signal failure of the host will be explained.
Countermeasure: particularly refer to the following inspection method step, the focus should check the cable between the antenna and the GPS navigation and both hosts.
(1) The vehicle opening to the open space.
FIG 1
(2) Select the navigation ldquo; menu rdquo; options ldquo; various settings rdquo; option, after entering the select ldquo ; equipment installation confirm rdquo; option. In ldquo; installation confirmation rdquo; interface (FIG. 1), it was confirmed ldquo; the GPS antenna rdquo; dot to the left if the item is displayed in yellow. If then the yellow work GPS satellite signal reception, the host can attempt to replace the navigation investigation; if the gray dot, it indicates not receiving GPSA satellite signal, the GPS antenna should focus on checking, and GPS navigation host cable between the antenna and the rear luggage compartment navigation unit (Figure 2).
FIG. 2
(3) during navigation, if a color appears on the screen, a DVD or the like changes instability, typically after a navigation host the video output terminal loose (FIG. 3).
3
Note: Roewe R750i GPS navigation host of new, old two, and the two discs are not compatible, that is old the host uses to match its old discs, the new host needs a new disc. Old state of the host (Fig. 4) panel Panasonic logo with the bottom panel and model designations Strada CN-D105H and identity; the new state of the host model designation CD-VX27C0FJ, and Panasonic Strada no sign. Old state of CD packaging and disc surface UR logo, new state of the disc packaging and disc surface U70 flag.
Figure 4
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