Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Vehicle Position Mark Deviates Greatly

CAUTION / NOTICE / HINT

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.

OK

NORMAL OPERATION

NG

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.

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:

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

OK

SYSTEM RETURNS TO NORMAL

NG

3.

CHECK GPS INFORMATION (OPERATION CHECK)

(a) Enter the "System Sensor Check" screen. Refer to Check GPS & Vehicle Sensors in Operation Check (See page ).

(b) Check how many of the following codes appear in the "Reception number" column.

HINT:

T or P appears.

OK:

At least 3 codes appear.

OK

REPLACE NAVIGATION RECEIVER ASSEMBLY

NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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Other materials:

XM Tuner Antenna Disconnected (B15FE,B15FF)
DESCRIPTION These DTCs are stored when a malfunction occurs in the antenna assembly with holder which is connected to the navigation receiver assembly assembly. DTC No. DTC Detection Condition Trouble Area B15FE The antenna assembly wi ...

Tire Pressure Monitor Receiver Communication Stop (B1247)
DESCRIPTION The main body ECU (multiplex network body ECU) and tire pressure warning ECU and receiver are connected using 2 direct lines that they use to communicate with each other. DTC No. Detection Item DTC Detection Condition Trouble Area ...

Head restraints
Head restraints are provided for all seats. ■ Adjusting the head restraints Bench type front seat Up Pull the head restraints up. Down Push the head restraint down while pushing the lock release button. Separated type front seat Up Pull the head restraints up. Down Push th ...

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