2001 TOYOTA PRIUS light

BODY ELECTRICAL ± AIR CONDITIONING
182BE51
Hi
Lo Blower
Air
Volume
Small Large
Amount of Sunligt
182BE28182BE29
1
0
Small Large
Vehicle Speed Fresh Air
Recirculation
182BE52
Outlet Air
Half
Inlet Air
Low High
TAO (Temperature Air Outlet) 170
d. Sunlight Air Flow Control
Controls the blower speed in accordance
with the intensity of the sunlight when the air
outlet mode is at FACE or BI-LEVEL. The
blower low speed can be adjusted up to 4
steps, in response to the sunlight signal re-
ceived from the solar sensor.
2-Way Flow Mode Control
At the time of selecting FRESH mode, air conditioning ECU will judge it as 2-way flow mode when the
blower outlet is selected to FOOT or FOOT / DEF, the tentative air mix damper opening angle is above the
specified valve (MAX HOT), and either the blower volume is more than the specified volume or the vehicle
speed is less than the specified speed.
Half Inlet Air Mode Control
At the time of selecting FRESH mode, air condi-
tioning ECU will judge it as half inlet air mode
when the blower outlet mode is selected to FACE
or BI-LEVEL and TAO (Temperature Air Out-
let) is more than the specified temperature, and
operates both outlet air introduction and inlet air
circulation at the same time.

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
182BE38
EMPS System
Abnormality WarningTHS Abnormality
Warning
HV Battery Warning
182BE39
178
3) Interrupt Screen
a. General
If an abnormal condition occurs in the ve-
hicle system, even if another screen is being
displayed, the interrupt screen automatically
indicates a warning to inform the driver of an
abnormality in the system. The warning in-
dication screen flashes for 5 seconds the
mark of the system in which the abnormality
occurred. Then, it illuminates and remains
displayed until the screen is switched or the
system is reinstated to normal.

List of Warning Display Items 
Warning Display ItemDescription of Warning
EMPS System
Abnormality WarningWhen an abnormality occurs in the EMPS (Electric Motor-assisted
Power Steering) system.
HV Battery Warning*When the HV battery voltage drops.
THS Abnormality
WarningWhen an abnormality occurs in the THS (TOYOTA Hybrid System).
*: While ªREADYº light is lighting.
b. HV Battery Warning
When starting THS (when turning the IG key to START position) and if HV battery is displayed in this
interrupt screen, it means that HV battery has abnormality.
4) On-screen
If the screen switches to another screen while
displaying a warning indication, the mark of
the system in which the abnormality occurred
is displayed at the top right area of the screen.
The displayed mark disappears when the sys-
tem is reinstated to normal.

BODY ELECTRICAL ± ACCESSORIES
182BE41
RRP DBody
ECUUARTPower
Window
Master
SwitchDoor Control
Switch (Manual)
Door Control
Switch (Key-linked)
169BE10
Key Unlock
Warning SwitchDoor Courtesy
Switch
Door Lock
MotorsBody
ECU
Serial Data Link
Wireless Door
Control Receiver
Horn
RelayHeadlight
RelayTaillight
RelayTransmitter183
DOOR LOCK CONTROL SYSTEM
The door lock control system has the following features:
This system has a ªkey-linked lock and unlockº, ªkey-confine preventionº and ªmanual unlock prohibi-
tionº functions.
A 2-step unlock function is provided to unlock the driver's door by turning the key cylinder first and to
unlock passenger's door by turning it the second time.
The control of this system is effected by the body ECU. The door lock control signal from the driver's door
is transmitted from the power window master switch to the body ECU through the UART (Universal
Asynchronous Receiver Transmitter).
If you unlock using the ignition key from the conditions in which all the doors are locked, the dome light
will be lighted.

System Diagram 
WIRELESS DOOR LOCK REMOTE CONTROL SYSTEM
The wireless door lock remote control system has the following features:
In this system, the wireless door control receiver performs the code identification process and the body
ECU effects the door lock control. Serial data link is provided for communication between the wireless
door control receiver and the body ECU.
A key-holder type transmitter has been adopted, and it contains the following three switches: the door lock
switch, door unlock switch, and panic switch.
A rolling code system, in which the signal configuration changes each time when a signal is transmitted
by the transmitter, has been adopted.
Panic alarm operation has been adopted.
The verification light function has been adopted. When the transmitter is used to lock or unlock the doors,
this function flashes the taillights to inform that the operation has been completed. However, at the time
of unlocking, the dome light will be lighted.

BODY ELECTRICAL ± ACCESSORIES
182BE43
DKUL
DKL
LSWD
Power
Window
Master
Switch
Ignition Key SW
From
BatteryIG
LSWP
LSR
KSW
DCTY
PCTY
RCTY
LCTY
HCTY
LUG
Courtesy
Switches
PKL
PKUL
Door Lock Motors
RRP D
Body
ECU
From Battery
Headlight
RelayTaillight
RelayHorn
Relay
HRLY
TRLYTo
HeadlightTo
Taillight
To
Vehicles
Horn
HR
From Battery
Interior
Light
Interior
Light
Relay
Security
Horn
Wireless
Door Control
Receiver
MPX
INDECM
Security
Indicator
185
THEFT DETERRENT SYSTEM
1. General
The theft deterrent system uses the door lock control system components and some other parts. When
somebody attempts to forcibly enter the vehicle or open the engine hood or luggage compartment door
without a key, or when the battery terminals are removed and reconnected, the theft deterrent system
sounds the vehicle's horn, security horn and flashes the headlights, taillights, hazard lights and interior
light for about one minute to alert. At the same time, it locks all the doors.
The control of this system is effected by the body ECU.

Wiring Diagram 

BODY ELECTRICAL ± ACCESSORIES
Non-Alert State
Alert State
Alert Preparation State
Alarm State
Condition (3) Condition (1)
Condition (5) Condition (2)
Condition (6)
Condition (4)
Condition (5) 186

List of Input / Output Signals 
Terminal
NameOutlineTerminal
NameOutline
DKLDriver's door key lock signalLCTYRear left door courtesy switch status
signal
DKULDriver's door key unlock signalHCTYHood courtesy switch status signal
LSWDDriver's door lock position switch
signalLUGLuggage compartment door courtesy
switch status signal
IGIgnition key switch status signalPKLFront passenger door key lock signal
LSWPFront passenger door lock position
switch signalPKULFront passenger door key unlock
signal
LSRRear left door lock position switch
signalHRLYOutput signal to headlight relay
KSWIgnition key cylinder's key
presence / absence signalTRLYOutput signal to taillight relay
DCTYDriver's door courtesy switch status
signalHROutput signal to vehicle horn relay
PCTYFront passenger door courtesy switch
status signalMPXMultiplex Communication (BEAN)
RCTYRear right door courtesy switch
status signalINDOutput signal to security indicator
2. Operation
Non-Alert State: When the security function is inactive
Without having the ignition key in the ignition key cylinder, if any one of the conditions listed below exists,
the system transfers to the alert preparation state.
Condition (1)
When the doors, engine hood, and luggage compartment door are all closed, the ignition key is used to
lock all doors.
When the doors, engine hood, and luggage compartment door are all closed, the wireless door lock re-
mote control system is used to lock all doors.
When all doors are locked, if any door, engine hood, or luggage compartment door is changed from ªcloseº
to ªopenº, and ªcloseº again, all doors, engine hood, and luggage compartment door will be locked.
Alert Preparation State: a delay time until the alert state
The system transfers to the alert state if the condition (2) listed below is met, and to the non-alert state if one
of the conditions (3) is met.

BODY ELECTRICAL ± ACCESSORIES187
Condition (2)
When the doors, engine hood, and luggage compartment door are all closed and locked, and 30 seconds
have elapsed.
Condition (3)
When one of the doors, engine hood, or luggage compartment door is changed from ªcloseº to ªopenº.
When one of the doors, engine hood, or luggage compartment door is changed from ªlockº to ªunlockº.
When the ignition key is inserted in the ignition key cylinder.
When a terminal is disconnected from the battery and re-connected.
Alert State: a state in which attempted theft can be detected
The system transfers to the alarm state if any one of the conditions (4) listed below is met, or to the non-alert
state if any one of the conditions (5) is met.
Condition (4)
Any door, engine hood, or luggage compartment door is opened.
The ignition key or the wireless door lock remote control system other than the transmitter is used for
unlocking.
The luggage compartment door is opened with something other than the ignition key.
The engine hood is opened.
A terminal is disconnected from the battery and re-connected.
The wiring harness is directly connected as if to turn the ignition switch ON.
Condition (5)
The ignition key is used to unlock the doors or the luggage compartment door.
The transmitter of the wireless door lock remote control system is used to unlock the doors.
The ignition key is inserted in the ignition key cylinder and turned until the ignition switch is ON.
Alarm State: a state in which attempted theft can be detected
When an attempted theft is detected, the system sounds the vehicle's horn and the security horn, flashes
the headlights, taillights, and hazard lights, and illuminates the interior light to alert the people in the area.
If any one of the doors is unlocked, and the ignition key is not inserted in the ignition key cylinder, the
system forcefully locks the doors once.
The system transfers to the alert state if the condition (6) described below is met, or, when the system is
in the alarm state, it transfers to the non-alert state if any one of the conditions (5) described above is met.
At this time, the taillights are illuminated for 2 seconds to inform the driver that an attempted theft has been
detected.
Condition (6)
After approximately 60 seconds of the alarm time have elapsed.

BODY ELECTRICAL ± ACCESSORIES
182BE44
SRS
Warning LightInflator and Bag
for Front Passenger
Front Airbag
Sensor (RH)
Side Airbag
Assembly (RH)
Seat Belt
Pretensioner (RH)
Side Airbag
Sensor (RH) Airbag Sensor
Assembly Seat Belt
Pretensioner (LH) Side Airbag
Sensor (LH) Side Airbag
Assembly (LH)Front Airbag
Sensor (LH)Inflator and Bag
for Driver
182BE45
CollisionImpact
Front Airbag Sensors
Airbag Sensor
Assembly
 Inflator
 (For Driver and Front Passenger)
 Seat Belt Pretensioner
 (LH and RH)
Inflator
(For Right Side or Left Side)
CollisionImpactSide
Airbag
Sensor 188
SRS AIRBAG AND SRS SIDE AIRBAG
The SRS (Supplemental Restraint System) airbags are provided for the driver and front passenger. The
SRS airbags have been designed to help reducing the shocks to the heads and chests of the driver and front
passenger in the event of a frontal impact collision as supplements to the seat belts.
This system is a 3-sensor type airbag system to detect the impact during a front collision using the airbag
sensor assemblies and front airbag sensor, and to make the airbag system and seat belt pretensioner operate
as well.
Also, the function of the ECU to memorize the seat belt wearing condition while inflating the airbag is
added.
The SRS side airbags are provided for the driver and front passenger as an option. The SRS side airbags
have been designed to help reducing the impact energy that is transmitted to the driver and front passenger
in the event of a side collision.
The driver side and the front passenger side are each provided with one sensor.
A fuel cut control has been adopted to stop the fuel pump when the SRS airbag is deployed, thus helping
reduce fuel leakage.

System Diagram