System Normal Condition Check

If the symptom is applicable to any of the following, it is intended behavior, and not a malfunction.

SYMPTOM REFERENCE

Symptom	Answer
A longer route than expected is chosen.	Depending on road conditions, navigation ECU may determine that a longer route is quicker.
Even when distance priority is high, shortest route is not shown.	Some paths may not be advised due to safety concerns.
When vehicle is put into motion immediately after engine starts, navigation system deviates from actual position.	If the vehicle is moved before the navigation system activates, system may not react.
When running on certain types of roads, especially new roads, vehicle position deviates from actual position.	When vehicle is driving on new roads not available on map disc, system attempts to match it to another nearby road, causing position mark to deviate.

The following symptoms are not a malfunction, but are caused by errors inherent in the GPS, gyro sensor, speed sensor, and navigation ECU.
1. The current position mark may be displayed on a nearby parallel road.
  
  Fig 1: Identifying Vehicle Current Position Mark Displayed On Nearby Parallel Road
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Immediately after a fork in the road, the current vehicle position mark may be displayed on the wrong road.
  
  Fig 2: Identifying Current Vehicle Position Mark (Immediately After Fork In Road)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. When the vehicle turns right or left at an intersection, the current vehicle position mark may be displayed on a nearby parallel road.
  
  Fig 3: Identifying Current Vehicle Position Mark (Turns Right Or Left At An Intersection)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. When the vehicle is carried, such as on a ferry, and the vehicle itself is not running, the current vehicle position mark may be displayed in the position where the vehicle was until a measurement can be performed by the GPS.
  
  Fig 4: Identifying Current Vehicle Position Mark (Vehicle Carried)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. When the vehicle runs on a steep hill, the current vehicle position mark may deviate from the correct position.
  
  Fig 5: Identifying Current Vehicle Position Mark (Vehicle Runs On Steep Hill)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. When the vehicle makes a continuous turn of 360, 720, 1,080, etc. degrees, the current vehicle position mark may deviate from the correct position.
  
  Fig 6: Identifying Current Vehicle Position Mark (Vehicle Makes Continuous Turn)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. When the vehicle moves erratically, such as constant lane changes, the current vehicle position mark may deviate from the correct position.
  
  Fig 7: Identifying Current Vehicle Position Mark (Vehicle Moves Erratically)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
8. When the turn the ignition switch ACC or OFF position on a turn table before parking, the current vehicle position mark may not point in the correct direction. The same will occur when the vehicle comes out of parking.
  
  Fig 8: Identifying Current Vehicle Position Mark (Before Parking)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
9. When the vehicle is running on a snowy road, on a mountain path with the chains installed, or with a spare tire, the current vehicle position mark may deviate from the correct position.
  
  Fig 9: Identifying Current Vehicle Position Mark (Vehicle Running On Snowy Road)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
10. When a tire is changed, the current vehicle position mark may deviate from the correct position.
  HINT:
  - The diameter of the tire may change, causing a speed sensor error.
  - Performing the tire change in calibration mode will allow the system to correct the current vehicle position faster.
    
    Fig 10: Identifying Current Vehicle Position Mark (Tire Change)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002