Vehicle Position Mark Deviates Greatly

NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: Vehicle Position Mark Deviates Greatly; 2013 MY Corolla [07/2012 -]
- Vehicle Position Mark Deviates Greatly

INSPECTION PROCEDURE

NOTICE:
* If standard size tires are not installed, the vehicle position mark may deviate from the route even if the navigation system is operating normally.
* Make sure that standard size tires are installed to the vehicle before inspection.

PROCEDURE

1. CHECK CABIN

(a) Check the cabin for any object that might interrupt radio reception on the instrument panel. If such an object exists, remove it and check if the vehicle position mark returns to the appropriate position.

HINT
The GPS uses extremely faint 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:

After driving for a while, the vehicle position mark returns to the appropriate position.

NG -- CHECK SURROUNDINGS

OK -- NORMAL OPERATION

2. CHECK SURROUNDINGS

(a) Check if the vehicle is in a location where GPS signal reception is poor. If the vehicle is in such a location, move the vehicle and check if the vehicle position mark returns to the appropriate position.

HINT
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.





OK:

After driving for a while, the vehicle position mark returns to the appropriate position.

Text in Illustration





NG -- CHECK GPS INFORMATION (OPERATION CHECK)

OK -- SYSTEM RETURNS TO NORMAL

3. CHECK GPS INFORMATION (OPERATION CHECK)

(a) Display the "Location & GPS Information" screen.





(b) Check that the actual vehicle location and current location information displayed on the screen match.

OK:

Actual vehicle location and current location information displayed on the screen match.

Text in Illustration





NG -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table
OK -- Continue to next step.

4. CHECK VEHICLE SIGNAL (OPERATION CHECK)

(a) Enter the "Vehicle Signal Check Mode" screen. Refer to Check Vehicle Signal in Operation Check Operation Check.

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





OK:





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

NG -- GO TO "REVERSE SIGNAL DOES NOT CHANGE IN VEHICLE SIGNAL CHECK MODE" IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table