2001 TOYOTA PRIUS door lock

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

DI62G±07
DI±688
± DIAGNOSTICSBODY CONTROL SYSTEM
2001 PRIUS (RM778U)
PROBLEM SYMPTOMS TABLE
POWER WINDOW CONTROL SYSTEM
SymptomSuspect AreaSee page
All the power windows does not operate.
3. Master switch circuit
4. Driver door ECU with master switch
5. Body ECUDI±724
DI±730
IN±41
Power window does not operate.1. Power window switch circuit
2. Body ECUDI±726
IN±41
DOOR LOCK CONTROL
SymptomSuspect AreaSee page
Lock or unlock cannot be operated with door lock control S/W.
1. Door lock control switch circuit
(Master switch)
2. Body ECUDI±706
DI±724
IN±41
Door key linked function does not operate.1. Door key lock and unlock switch circuit
2. Body ECUDI±708
IN±41
Key confinement prevention function does not operate.1. Key unlock switch circuit
2. Body ECUDI±695
IN±41
Does not lock and unlock each door only.1. Door lock motor circuit
2. Body ECUDI±712
IN±41
Luggage compartment door opener function does not operate.1. Luggage component door courtesy switch circuit
2. Body ECUDI±722
IN±41
WIRELESS DOOR LOCK CONTROL
SymptomSuspect AreaSee page
All function of wireless door lock control system do not operate.
1. Transmitter
2. Wireless tuner circuit
3. Key unlock warning switch circuit
4. Body ECUBE±83
DI±728
DI±695
IN±41
Lock (or unlock) function does not operate.
1. Door key lock and unlock switch circuit
2. Door unlock detection switch circuit
3. Body ECUDI±708
DI±710
IN±41
Automatic lock function operates even if any door is opened within
30 seconds after all doors are unlocked by wireless door lock
control system .1. Door courtesy switch circuit
2. Body ECUDI±714
IN±41
ILLUMINATED ENTRY
SymptomSuspect AreaSee page
Illuminated entry does not operate.
1. Driver door courtesy switch circuit
2. Illuminaction circuit
3. Body ECUDI±714
DI±702
IN±41
HEADLIGHT AND TAILLIGHT SYSTEM:
SymptomSuspect AreaSee page
Headlight does not light up.
1. Light control switch circuit
2. Headlight control relay circuit
3. Body ECUDI±689
DI±693
IN±41
Taillight does not light up.
1. Light control switch circuit
2. Taillight control relay circuit
3. Body ECUDI±689
DI±691
IN±41
Auto turn±off system does not operate.1. Driver door courtesy switch circuit
2. Body ECUDI±714
IN±41

DI6QW±04
I15489
Body ECU
B B9
B8
1 5
8 11
159
8
8
2
13 5 3 1
6
24
1 1BDR F
FJ27
J/C
W±B
W±B
B±GB±Y
W±G W±GWR±G
2C
2D
2K 2B2H
2D10A GAUGE IG1 Relay30A DOOR7.5A ECU±B
5A AM1
J11
J/C
ID Battery F13 F11100A DC/DC FL Block No. 1I15 Ignition Switch
AM1 IG1
F18
FL Block No. 2
120A MAINB9 E Instrument Panel J/B
B
IG
A 7.5A OBDII
9
2DR±G
D
D
J26
J/CW±L W±L
W DI±690
± DIAGNOSTICSBODY CONTROL SYSTEM
2001 PRIUS (RM778U)
CIRCUIT INSPECTION
Power Source Circuit
CIRCUIT DESCRIPTION
This circuit provides power to operate the Body ECU.
WIRING DIAGRAM

I15489
Body ECU
B B9
B8
1 5
8 11
159
8
8
2
13 5 3 1
6
24
1 1BDR F
FJ27
J/C
W±B
W±B
B±GB±Y
W±G W±GWR±G
2C
2D
2K 2B2H
2D10A GAUGE IG1 Relay30A DOOR7.5A ECU±B
5A AM1
J11
J/C
ID Battery F13 F11100A DC/DC FL Block No. 1I15 Ignition Switch
AM1 IG1
F18
FL Block No. 2
120A MAINB9 E Instrument Panel J/B
B
IG
A 7.5A OBDII
9
2DR±G
D
D
J26
J/CW±L W±L
W DI±692
± DIAGNOSTICSBODY CONTROL SYSTEM
2001 PRIUS (RM778U)
Ignition Switch Power Source Circuit
CIRCUIT DESCRIPTION
When the ignition switch is turned to the ACC position, battery voltage is applied to the terminal ACC of the
ECU and when the ignition switch is turned to the ON position, battery voltage is applied to the terminal IG
of the ECU.
WIRING DIAGRAM
DI7NO±01

I15485
BatteryB9
BODY ECU
11
F112 5
6 3
2 15
1
11
1 WID2 2F
2K 2HTAIL
RELAY7.5A
TAIL Instrument Panel J/Bto Taillight
F18
FL BLock No. 2 FL Block No. 1LG LG
F13B±GTRLY
100A DC/DC 120A MAIN DI±696
± DIAGNOSTICSBODY CONTROL SYSTEM
2001 PRIUS (RM778U)
Taillight Relay Circuit
CIRCUIT DESCRIPTION
Taillight relay will be ºONº by operating the taillight switch. The transistor which activates the tail light relay
has two sorts: one activates by the tail light switch for fail safe and the other activates by CPU.
When the theft deterrent system is activated, it causes the transistor in the ECU to switch ON and OFF at
approximately 0.4 sec. intervals. This switches the taillight control relay ON and OFF, thus flashing the tail-
lights (See the wiring diagram below).
In this condition, if any of the following operations is done, the transistor in the ECU goes OFF and the taillight
control relay switches OFF, thus stopping the taillights flashing:
(1) Unlock the front LH or RH door with a key.
(2) Turn the ignition switch to ACC or ON position.
(3) Unlock the doors with the wireless door lock control system.
(4) Wait for approximately 60 seconds.
WIRING DIAGRAM
DI6QY±04

I15484
2 3 66
8 7
1 4 2
1
4
3 2 1 1
11
1
710
883
A L D
FE
E
E
LE
ER±L
R±G
R±W
R±G R±W R±W R±W
R±G
R±G B±G
R±G B
F13 F12
2I
2A 1B1F
1F
1F3
ID2 IA2J20
J/C
IA1
J4J5
ID 2K 2A
15
17
BatteryC10 High Beam
Indicator Light
(Comb. meter) F18
FL Block No. 2
J11
J/CJ4 H2
Headlight RH
10A HEAD (LH) 10A HEAD (RH)
Short Pin HEAD RelayEngine Room J/BB9
Body ECU
Short Pin
120A MAIN
Instrument
Panel J/BJ12 J13
W±B
H1
Headlight
LH
1
FL Block No. 13
1
HRLY
Instrument
Panel J/B DI±698
± DIAGNOSTICSBODY CONTROL SYSTEM
2001 PRIUS (RM778U)
Headlight Relay Circuit
CIRCUIT DESCRIPTION
Head light relay will be ºONº by operating the headlight switch. The transistor which activates the headlight
relay has two sorts: one activates directly by the headlight switch for fail safe and the other activates by CPU.
the one that activates by CPU has two systems and prevents the headlight from turning off at the time of
one system trouble in the automatic operation circuit.
When the theft deterrent system is activated, it causes the transistor in the ECU to switch ON and OFF at
approximately 0.25 sec. intervals. This switches the headlight control relay ON and OFF, thus flashing the
headlights (See the wiring diagram below).
In this condition, if any of the following operations is done, the transistor in the ECU goes OFF and the head-
light control relay switches OFF, thus stopping the headlights flashing:
(1) Unlock the front LH or RH door with a key.
(2) Turn the ignition switch to ACC or ON position.
(3) Unlock the doors with the wireless door lock control system.
(4) Wait for approximately 60 seconds.
WIRING DIAGRAM
DI5VQ±04

I15493
1920
B8 B±W
SH B±W
IE1
T1
Theft
Deterrent
HornBody ECU DI±704
± DIAGNOSTICSBODY CONTROL SYSTEM
2001 PRIUS (RM778U)
Theft Deterrent Horn Circuit
CIRCUIT DESCRIPTION
When the theft deterrent system is activated, the relay in the ECU turns ON and OFF cycles of approximately
0.2 sec., causing the theft deterrent horn to blow (See the wiring diagram below).
In this condition, if any of the following operations is done, the relay in the ECU turns OFF, thus stopping
the theft deterrent horn from blowing:
(1) Unlock the front LH or RH door with key.
(2) Turn the ignition switch to ACC or ON position.
(3) Unlock the doors with the wireless door lock control system.
(4) Wait for approximately 60 seconds.
(5) Push the panic switch of the wireless door lock control system.
Except for the anti±theft purpose, the theft deferrent horn is used as a high±pitched horn.
WIRING DIAGRAM
DI7NQ±01