NAVIGATION SYSTEM Vehicle Position Mark Deviates Greatly

PROCEDURE


  1. CHECK CABIN


    1. Check the cabin for any object that might interrupt radio reception or additional devices which use radio waves on the instrument panel. If such an object exists, remove it and check if the GPS mark reappears.

      Tech Tips

      The GPS uses extremely weak radio waves originating from satellites. If the signal is interrupted by obstructions or other radio waves, the GPS may not be able to properly receive the signal.

      OK
      The GPS mark appears.

    OK

    NORMAL OPERATION

    NG

  2. CHECK SURROUNDINGS


    1. Check if the vehicle is in a location where GPS signal reception is poor. If the vehicle is in such a place, relocate the vehicle and check if the GPS mark reappears.

      Tech Tips

      The GPS uses 24 satellites in 6 orbits. At any point in time, 4 satellites should be able to pinpoint your vehicle. However, GPS signals may not reach the vehicle due to influence from the surroundings, vehicle direction and time. For examples, see the following illustration.

      A004QPXE28
      OK
      The GPS mark is displayed.
      Text in Illustration
      *a Example *b In a tunnel
      *c In a building *d Under an overpass
      *e On a forest or tree-lined path *f Between tall buildings
      *g Under a cliff or overhang - -

    OK

    SYSTEM RETURNS TO NORMAL

    NG

  3. CHECK GPS INFORMATION (OPERATION CHECK)

    A004P0U

    1. Enter the "System Sensors Check" screen. Refer to Check System Sensors in Operation Check Click here.

    2. Check how many of the following codes appear in the "Reception number" column.

      Tech Tips

      T or P appears.

      OK
      At least 3 codes appear.

    NG

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    OK

  4. CHECK VEHICLE SIGNAL (OPERATION CHECK)


    1. Enter the "Vehicle Signal Check Mode" screen. Refer to Check Vehicle Signal in Operation Check Click here.

    2. A004NCX

      Check that the display changes between ON and OFF according to the shift lever operation.

      OK
      Shift Lever Position Display
      Except R OFF
      R ON

      Tech Tips

      The display is updated once per second. It is normal for the display to lag behind the actual switch operation.


    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    GO TO "REVERSE SIGNAL DOES NOT CHANGE IN VEHICLE SIGNAL CHECK MODE" IN PROBLEM SYMPTOMS TABLE