System Normal Condition Check

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.

CHECK NORMAL CONDITION

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

SYMPTOM REFERENCE CHART

Symptom	Answer
A longer route than expected is chosen	Depending on the road conditions, the navigation ECU may determine that a longer route is quicker
Even when distance priority is high, the shortest route is not shown	Some paths may not be advised due to safety concerns
When the vehicle is put into motion immediately after the hybrid system starts, the navigation system deviates from the actual position	If the vehicle starts before the navigation system activates, the system may not react
When running on certain types of roads, especially new roads, the vehicle position deviates from the actual position	When the vehicle is driving on new roads not available on the map disc, the system attempts to match it to another nearby road, causing the 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: Symptoms - Current Position Mark May Be 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: Symptoms - 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: Symptoms - When Vehicle 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 GPS.
  
  Fig 4: Symptoms - When Vehicle Carried On Ferry And Vehicle Itself Not Running
  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: Symptoms - When 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., the current vehicle position mark may deviate from the correct position.
  
  Fig 6: Symptoms - When Vehicle Makes Continuous Turn Of 360, 720, 1, 080 °
  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: Symptoms - When Vehicle Moves Erratically, Such As Constant Lane Changes
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
8. When the power switch is turned ON (ACC or IG) on a turntable while 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: Symptoms - Current Vehicle Position Mark May Not Point In Correct Direction
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
9. When the vehicle runs on a snowy road or a mountain path with tire chains installed or using a spare tire, the current vehicle position mark may deviate from the correct position
  
  Fig 9: Symptoms - Current Vehicle Position Mark May Deviate From Correct Position (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: Symptoms - Current Vehicle Position Mark May Deviate From Correct Position (Tire Changed)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002