Driving Test: Example

< The position marker consistently indicates the wrong position when driving in the same area. Determine if this is the result of the map matching function or the GPS function. >

--> Perform test pattern 1.

< To verify the accuracy of the road configuration shown on the display >

--> Perform test patterns 1 and 2.

• Compare the map and the saved driving tracks. The precision of the saved driving tracks is within several hundred meters.

  < To make distance calibration and adjustments >

--> Perform test patterns 1 and 2.

• Make adjustments by driving the vehicle over a known course (highway or other road where distances are clearly marked). Calibrate the distance against the known distance. Use the formula below.

  Calibration value = Screen display distance / Actual distance