2001 TOYOTA PRIUS display

BODY ELECTRICAL ± MULTIPLEX COMMUNICATION SYSTEM
182BE02
Display ECU
CPU
AV C - L A N
Transmis-
sion
Reception
ControlAVC-LAN
Transmis-
sion
Reception
CircuitAVC-LANGateway ECU
CPU
AVC-LAN
Transmis-
sion
Reception
CircuitCon-
version
ControlBEAN
Trans-
mission
Recep-
tion
Circuit
Audio
Components
BEAN
Body ECU Meter ECU
143
2. Gateway Function (Gateway ECU)
This multiplex communication system has adopted BEAN (Body Electronics Area Network) between the
body ECU, ECM, meter ECU, air conditioning ECU, and the gateway ECU, as well as AVC-LAN between
the display ECU and the audio components. Because the data configuration differs between BEAN and AVC-
LAN, their data must be converted in order for them to exchange each other's data. The conversion of com-
munication data is performed by the gateway ECU. As a result, it has become possible for a single commu-
nication line to transmit various types of information.

BODY ELECTRICAL ± METER
182BE04
182BE16
U.S.A. Model
Canada Model Master Warning LightOutput Control
Warning Light
ªREADYº Light 146
METER
COMBINATION METER
1. General

The combination meter is available as a digital display type. It is located at the upper center of the instru-
ment panel to improve its visibility.

For this combination meter, a meter ECU that effects multiplex communication through the use of BEAN
(Body Electronics Area Network) has been adopted.

The display of the speedometer can be switched between km / h and MPH readings by operating the km / h-
MPH selector switch located in the middle of the center cluster. Furthermore, the odo / trip meter can be
switched between odometer and tripmeter readings by operating the odo / trip selector / reset switch located
in the middle of the center cluster.

A ªREADYº light that informs the driver that the vehicle is ready to be driven has been adopted.

A master warning light that informs the driver if an abnormality occurs in either the EMPS (Electric Motor-
assisted Power Steering), HV batteries, or the THS (TOYOTA Hybrid System) has been adopted.

An output control warning light has been adopted to show the drop of power function due to the output
drop of HV batteries.

For the purpose of making corrections in the calculation of the fuel level by the meter ECU, two inclination
sensors that detect the vehicle's longitudinal and latitudinal inclinations have been provided in the meter
ECU. In addition, an outer ambient temperature sensor has been provided in the fuel tank to detect the
temperature in the fuel tank.

BODY ELECTRICAL ± METER
182BE05
Km / h-MPH Selector Switch
182BE06
Odo Meter
Trip Meter A
Trip Meter B
Odo / Trip Selector / Reset Switch147
2. Construction and Operation
Speedometer

The speedometer is displayed digitally
through the VFD (Vacuum Fluorescent Dis-
play). It can be switched between the km / h
and MPH readings by operating the km / h-
MPH selector switch located in the middle of
the center cluster.

The vehicle speed signal, which originates at
the speed sensor that is installed in the hybrid
transaxle, travels via the HV ECU and ECM
(BEAN) and is received by the meter ECU.
Odo / Trip Meter
Similar to the speedometer, the odo / trip meter is
displayed digitally through the VFD (Vacuum
Fluorescent Display). By operating the odo / trip
selector / reset switch located in the middle of the
center cluster, its display can be switched in the
following sequence: odometer
trip meter A

trip meter B.
While trip meter A or B is displayed, pressing the
odo / trip selector / reset switch 0.8 seconds or
longer causes the driven distance displayed by
the current trip mode to revert to 0.0 mile or 0.0
km.
The trip meter will resume measuring the dis-
tance at the moment the odo / trip selector / reset
switch is released.

BODY ELECTRICAL ± ACCESSORIES173
ACCESSORIES
MULTI-INFORMATION DISPLAY
1. General
A multi-information display has been provided on top of the center console as standard equipment.
Consisting of a 5.8-inch wide LCD (Liquid Crystal Display) screen, this multi-information display pro-
vides a vehicle information screen, warning screen, and an audio operation screen. The outside tempera-
ture is also shown on the screen.
A GPS (Global Positioning System) voice navigation is offered as an option. Through the use of the GPS
and the map data in a DVD (Digital Versatile Disc), this navigation system analyzes the position of the
vehicle and indicates that position on the map that is displayed on the screen. Additionally, it provides
voice instructions to guide the driver through the route to reach the destination that has been selected.
Listed below are the main functions of the multi-information display.
Function
Outline
Map Screen Display*
Enlargement / reduction, rotation and movement of map.
Indication of current position and direction of travel.
Correction of current position.
Setting, change and indication of route.
Voice guidance.
Indication of enlarged intersections.
Memory and indication of map position.
Audio Screen DisplayStatus of audio equipment and audio operation screen indication.
Information
Screen DisplayEnergy monitor screen indication.
Fuel consumption screen indication.
Adjustment
Screen DisplaySound quality adjustment screen indication.
Image quality adjustment screen indication.
No indication.
On-screen DisplayAudio status indication.
Warning indication.
Interrupt Screen
DisplayWarning indication.
Diagnosis Screen
DisplayDisplay system diagnosis.
Displays various type of coefficient settings.
*: with GPS Voice Navigation System

BODY ELECTRICAL ± ACCESSORIES
182BE34
Navigation
ECUGPS Antenna
AVC-LANBEAN
Gateway
ECUMeter
ECUECM
Center Cluster
Switches
 Navigation-related
 switches
 Audio-related
 switches
Display
ECU
Multi-information
DisplayAudio Unit Front LH
Speaker
(Voice
Guidance)
182BE35
GPS Antenna*
Navigation ECU*
DVD*
Center Cluster Switches
and Audio UnitMulti-information
Display 174
2. System Diagram
3. Layout of Components
*: with GPS Voice Navigation System

BODY ELECTRICAL ± ACCESSORIES175
4. Construction and Operation
General
This system mainly consists of a multi-information display, navigation ECU, display ECU, gateway ECU,
GPS antenna and audio unit.
The navigation ECU, display ECU, gateway ECU, and the audio unit all maintain communication through
the AVC-LAN.
Navigation ECU
The navigation ECU is provided on the models with the GPS voice navigation. Based on the map data on
the DVD, signals from the GPS satellites, signals from the built-in gyro sensor, and signals from the ve-
hicle's speed sensor, this ECU calculates the vehicle's present position, direction of travel, and driven dis-
tance, and transmits the data to the display ECU. In addition, it outputs navigation voice instructions.
Display ECU
Upon receiving the vehicle information that is transmitted by the gateway ECU, the navigation information
that is transmitted by the navigation ECU, and the operation information from the audio unit, the display
ECU displays these data on the multi-information display.
Gateway ECU
The gateway ECU transmits the vehicle information to the display ECU in order for it to be displayed on
multi-information display. Because vehicle information is transmitted by the ECUs that maintain commu-
nication on the BEAN (Body Electronics Area Network), the gateway ECU converts this information into
signals for AVC-LAN use and sends it to the display ECU.
GPS Antenna
The GPS antenna is provided on the models with the GPS voice navigation.
The GPS antenna receives signals from the GPS satellites that are located on the orbits that circle the earth
at an approximate altitude of 20,000 km. The GPS satellites continuously transmit orbit signals and the sig-
nal transmission time.
Multi-information Display
The multi-information display has the functions for displaying the map screen, audio screen, information
screen, adjustment screen, interrupt screen, and on-screen.
This system's self-diagnosis function can be displayed and operated on the multi-information display.
For details, refer to the 2001 Prius Repair Manual (Pub. No. RM778U).

BODY ELECTRICAL ± ACCESSORIES 176
1) Map Screen
The map screen is a function that is provided in the GPS voice navigation system.
Based on the map data on the DVD, signals from the GPS satellites, signals from the built-in gyro sensor,
and signals from the vehicle's speed sensor, the vehicle's present position, direction of travel, and driven
distance are calculated and displayed on this screen. This screen has the display functions listed below.
Item
Outline
Heading Up / North UpChanges the orientation of the map.
Front WideDisplays a map in the direction of travel of the vehicle in
an enlarged form.
Stepless Scale DisplayChanges the scale of the map from the basic 11 steps to
an even finer display.
Direct Scale ChangeDirectly select and display the map scale.
Multi-step Scale DisplayChange and display the map scale in 11 stages.
Map DisplayScroll DisplayScrolls the screen to display the desired point on the map.Map Display
Split-view DisplayDisplays different modes on a screen that is split into two
views.
Points-of-Interest
DisplayDisplays selected types of marks on the map.
Taillight-interlocked
Map Color ChangeChanges the displayed color on the map screen when the
taillights are turned ON.
Road Number Sign
Board DisplayDisplays the road numbers on the map.
Hybrid Points-of-interest
SearchNarrows the search by names of the points-of-interest,
category, and areas.
Points-of-interest
Pinpoint DisplayPinpoints and displays the position of the point-of-
interest.
House Number SearchSearches for a house number.
Special Memory PointSets a pre-registered point as a destination point while
driving.
Destination
SearchNearest Points-of-
Interest Search List
Display
Searches nearest points-of-interest and displays a list.
Intersection SearchBy specifying two streets, the point at which they
intersect is set as the destination point.
Emergency SearchPerforms a specific search for hospitals, police stations,
and dealers.
Freeway Entrance / Exit
SearchSearches for the destination by the name of the street that
connects to a freeway entrance / exit.
Route SearchSearches for multiple routes.
Search
Search Condition
DesignationSearches for the recommended, shortest, and other
routes.
SearchRegulated Road
ConsiderationPerforms search while considering regulated roads.
Avoidance AreaAvoids a designated area and searches a route.
(Continued)

BODY ELECTRICAL ± ACCESSORIES
182BE37 182BE36
177
Item
Outline
Right or Left Turn
GuidanceVoice guidance to instruct the direction of travel to be
taken.
Freeway Direction of
Travel GuidanceVoice guidance to instruct the direction of travel to take
on the freeway.
Guidance
Distance Display to
DestinationDisplays the distance from the present location to the
destination.
GuidanceFreeway Branch Type
Specimen GuidanceType specimen for guidance to a freeway branch.
Intersection Zoom-in
DisplayZoom-in display when approaching an intersection.
Turn List DisplayDisplays a turn list on the right side of the two-screen
display when approaching an intersection.
2) Information Screen
The information screen provides two types of indications: the energy monitor screen indication that dis-
plays the present energy flow of the hybrid system, and the fuel consumption screen indication that dis-
plays the average fuel consumption rate, the amount of regenerative energy, and the instantaneous fuel
consumption rate.
a. Energy Monitor Screen Indication
This screen indicates the energy transmis-
sion direction for checking the current drive
method (engine, motor or both), the power
generation status by the engine and status of
regenerative energy use.
b. Fuel Consumption Screen Indication
This screen indicates the average fuel con-
sumption, recovered energy and the current
fuel consumption, all at once.
The average fuel consumption is calculated
using 5-minute units. The recovered energy
over the past 5 minutes is indicated by sym-
bols, with one mark representing 50 Wh.
In addition, the total fuel consumption be-
fore resetting and the total travel distance are
displayed at the right bottom of the screen.