2001 TOYOTA PRIUS Door key lock

BODY ELECTRICAL ± LIGHTING145
ILLUMINATED ENTRY SYSTEM
When a door is unlocked through a key operation or transmitter operation, or if a door is opened or closed,
the illuminated entry system turns ON the dome light. If the ignition switch is turned to the ACC or ON
position or if all doors are locked during the 15 seconds in which this light are ON, they will immediately
turn OFF.
This system is controlled by the body ECU.
LIGHT AUTO TURN-OFF SYSTEM
When the ignition key is turned from ON or ACC to LOCK position and the driver's door is opened with
the taillights and headlights on, this system automatically turns them off.
This system is controlled by the body ECU.

BODY ELECTRICAL ± ACCESSORIES
182BE40
Power
Window
Master
SwitchUART
Body
ECUFront
Passenger
Switch
Rear LH
Passenger
SwitchRear RH
Passenger
Switch 182
POWER WINDOW SYSTEM
The power window system has the following features:
This system includes one-touch auto-up and down and key-off operation function. The one-touch auto up
and down function automatically fully closes and opens the driver's side window. The key-off operation
function makes it possible to operate the power windows for approximately 45 seconds after the ignition
key is turned to the ACC or LOCK position, if the front doors are not opened.
Also, a jam protection function has been adopted to the closing operation of the driver's window. If a for-
eign object becomes jammed in the window during one-touch auto-up or key-off operation of the driver's
window, this function automatically stops the power window and moves it downward.
This system controls the driver's door through the power window master switch, and the front passenger
and rear passenger doors through the body ECU. The power window master switch and the body ECU
maintain communication through the UART (Universal Asynchronous Receiver Transmitter).

System Diagram 

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.

DI7NN±01
I15530
B9 B8
DI±686
± DIAGNOSTICSBODY CONTROL SYSTEM
2001 PRIUS (RM778U)
TERMINALS OF ECU
BODY ECU
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
FLD e E GBWBPower window (FR LH) is not operatingBelow 1 vFLD e E
(B8±2 ± B9±1)G - B e W ± BPower window (FR LH) is operating downward10 ± 14 v
FLU e E RWWBPower window (FR LH) is not operatingBelow 1 vFLU e E
(B8±3 ± B9±1)R ± W e W ± BPower window (FR LH) is operating upward10 ± 14 v
LUG e E LBWBLuggage compartment door key lock and unlock switch is ONBelow 1 vLUG e E
(B8±5 ± B9±1)L ± B e W-BLuggage compartment door key lock and unlock switch is OFF10 ± 14 v
RX (B8±6)YAVC ± LAN communication circuit±±
PRG (B8±7)B ± RWireless door lock ECU communication circuit±±
RDA (B8±8)LWireless door lock ECU communication circuit±±
HR e E BRWBHorn switch is ONBelow 1 vHR e E
(B8±10 - B9±1)B ± R e W- BHorn switch is OFF10 ± 14 v
BDR ± ± Body ground
(B8±11 - Body ground)W ± L e
Body groundConstant10 ± 14 v
PCTY e E RWWBPassenger door courtesy switch is OFFBelow 1 vPCTY e E
(B8±12 - B9±1)R ± W e W - BPassenger door courtesy switch is ON10 ± 14 v
HCTY e E RWWBEngine hood courtesy switch is OFFBelow 1 vHCTY e E
(B8±13 - B9±1)R ± W e W - BEngine hood courtesy switch is ON10 ± 14 v
LCTY e E RLWBLuggage door courtesy switch is OFFBelow 1 vLCTY e E
(B8±14 - B9±1)R ± L e W - BLuggage door courtesy switch is ON10 ± 14 v
MPX+ (B8±15)GR ± BMultiplex communication circuit±±
MPX± (B8±16)GRMultiplex communication circuit±±
LSWP e E WWBPassenger door unlock detection switch OFF (door unlocked)Below 1 vLSWP e E
(B8±17 - B9±1)W e W - BPassenger door unlock detection switch ON (door locked)10 ± 14 v
LSR e E WLWBRear door unlock detection switch OFF (door unlocked)Below 1 vLSR e E
(B8±18 - B9±1)W ± L e W - BRear door unlock detection switch ON (door locked)10 ± 14 v
SH e E BWWBTheft deterrent system is not operatingBelow 1 vSH e E
(B8±20 - B9±1)B ± W e W - BTheft deterrent system is operating10 ± 14 v
E ± Body ground
(B9±1 - Body ground)W ± B e
Body groundConstantBelow 1 v

± DIAGNOSTICSBODY CONTROL SYSTEM
DI±687
2001 PRIUS (RM778U)Symbols (Terminals No.)
Wiring ColorConditionSTD Voltage (V)
HRLY e E RWWBLight control switch OFFBelow 1 vHRLY e E
(B9±2 - B9±1)R ± W e W - BLight control switch TAIL or HEAD10 ± 14 v
PKBL e E PLWBPassenger side buckle switch ON (belt fastened)Below 1 vPKBL e E
(B9±3 - B9±1)P ± L e W - BPassenger side buckle switch OFF (belt fastened)10 ± 14 v
DKBL e E GOWBDriver side buckle switch ON (belt fastened)Below 1 vDKBL e E
(B9±5 - B9±1)G ± O e W - BDriver side buckle switch OFF (belt fastened)10 ± 14 v
L2 e E GWBDoor lock manual switch OFF or UNLOCKBelow 1 vL2 e E
(B9±7 - B9±1)G e W - BDoor lock manual switch LOCK10 ± 14 v
B e Body ground
(B9±±9 - Body ground)R ± G e
Body groundConstant10 ± 14 v
ACTD e E
(B9±10 - B9±1)R e W - BDriver door is operating10 ± 14 v
TRLY e E LGWBLight control switch OFFBelow 1 vTRLY e E
(B9±11 - B9±1)LG e W - BLight control switch TAIL or HEAD10 ± 14 v
IND e E
(B9±13 - B9±1)LG ± B e
W - BDuring set is theft deterrent system10 ± 14 v
L1 e E GBWBDoor key lock and unlock switch OFF or UNLOCKBelow 1 vL1 e E
(B9±14 - B9±1)G ± B e W - BDoor key lock and unlock switch LOCK10 ± 14 v
UL1 e E RBWBDoor key lock and unlock switch OFF or LOCKBelow 1 vUL1 e E
(B9±15 - B9±1)R ± B e W - BDoor key lock and unlock switch UNLOCK10 ± 14 v
UL2 e E LBWBDoor lock manual switch OFF or LOCKBelow 1 vUL2 e E
(B9±16 - B9±1)L ± B e W - BDoor lock manual switch UNLOCK10 ± 14 v
H e E RWBLight control switch OFF or TAILBelow 1 vH e E
(B9±17 - B9±1)R e W - BLight control switch HEAD10 ± 14 v
T e E LG BWBLight control switch OFFBelow 1 vT e E
(B9±18 - B9±1)LG ±B e W ± BLight control switch TAIL or HEAD10 ± 14 v