Toyota Sequoia (2005). Manual - part 591

DIDBO–01

–

DIAGNOSTICS

NAVIGATION SYSTEM

DI–2159

2353

NAVIGATION SYSTEM

PRECAUTION

NOTICE:
When disconnecting the battery terminal, initialize the following system after the terminal is recon-
nected.

System Name

See Page

Back Door Power Window Control System

BE–77

DIDBP–01

I27727

Instrument Panel J/B

 RAD NO. 2 Fuse

 ECU–B Fuse

 AM1 Fuse

Engine Room J/B

 RAD NO. 1 Fuse

 RAD NO. 3 Fuse

Steering Pad 
Switch

Ignition Switch

Disc Player 
Controller 
(*1)

Stereo
Component
Amplifier

Multi–display
Controller (*1)

VTR 
Terminal 
(*1)

Headphone
Terminal
(*1) (*2)

Radio and 
Navigation Assy

GPS Antenna

Tweeter

Television Display Assy (*1)
Rear Seat Audio 
Controller Assy (*2)

Rear Door Speaker

Rear Door Speaker

Front Door Speaker 
and Woofer

Front Door Speaker 
and Woofer

*1: w/ RSE System
*2: w/ RSA System

DI–2160

–

DIAGNOSTICS

NAVIGATION SYSTEM

2354

LOCATION

DIDBQ–01

I28761

Radio 
and 
Navigation 
Assy

Steering Pad Switch

Stereo 
Component 
Amplifier
 Assy

Vehicle Speed Signal

Reverse Signal

GPS Antenna

AVC–LAN

Park/Neutral Position Switch

Combination Meter

Speakers

Display Signal

Sound Signal

Multi–display 
Controller 
Assy (*1)
Rear Seat 
Audio 
Controller 
(*2)

*1: w/ RSE System
*2: w/ RSA System

(*1)

–

DIAGNOSTICS

NAVIGATION SYSTEM

DI–2161

2355

SYSTEM DIAGRAM

DIDBR–01

I28195

I28196

I28197

DI–2162

–

DIAGNOSTICS

NAVIGATION SYSTEM

2356

SYSTEM DESCRIPTION

1.

SYSTEM NORMAL CONDITION CHECK

(a)

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

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

engine starts, the navigation system deviates from the actu-

al 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.

(b)

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.

(2)

Immediately after a fork in the road, the current ve-
hicle position mark may be displayed on the wrong
road.

(3)

When the vehicle turns right or left at an intersec-
tion, the current vehicle position mark may be dis-
played on a nearby parallel road.