Toyota Tundra. Manual — part 472

HINT:

When the noise does not match the examples above, refer to step 3, "Reception Problems". Check
the descriptions about phasing and multipath.

SYSTEM NORMAL CONDITION CHECK

1. CHECK NORMAL CONDITION

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

NORMAL CONDITION SYMPTOM CHART

b. The following symptoms are not a malfunction, but are caused by errors inherent in the GPS, gyro

sensor, speed sensor, and navigation receiver.

1. The current position mark may be displayed on a nearby parallel road.

Fig. 20: Identifying Position Mark On Parallel Road
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2. Immediately after a fork in the road, the current vehicle position mark may be displayed on

the wrong road.

Symptom

Answer

A longer route than expected is chosen.

Depending on the road conditions, the navigation
receiver 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 engine 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.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra

Fig. 21: Identifying Vehicle Position Fork In Road
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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. 22: Checking Vehicle Position When Vehicle Turns Right Or Left
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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. 23: Checking Vehicle Position When Vehicle Carried
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

5. When the vehicle runs on a steep hill, the current vehicle position mark may deviate from the

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra

correct position.

Fig. 24: Identifying Vehicle Position Mark In Correct Position - Runs On Steep Hill
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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. 25: Checking Vehicle Position When Vehicle Makes Continuous Turns
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

7. When the vehicle moves erratically, such as constant lane changes, the current vehicle

position mark may deviate from the correct position.

Fig. 26: Identifying Vehicle Position When Vehicle Moves Erratically
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra

8. When the ignition switch is turned ON or ACC 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. 27: Checking Vehicle Position When Ignition Switch Turned To ACC Or ON
Position
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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. 28: Identifying Vehicle Position When Vehicle Runs On Snowy Road Or Mountain
Path
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra