2001 TOYOTA PRIUS instrument panel

I15490
PCTY 12 13
3 3
1A A
1
6
63Body ECU
B8
ID2
J12 J13
IB12K
2L
2K R±W
R±G
R R±W
R±W
R±W
R±WR±W F D J16
J/CInstrument
Panel J/B
D7
Door
Courtesy
SW
Front RHD6
Door
Courtesy
SW
Front LHD8
Door
Courtesy
SW
Rear LHD9
Door
Courtesy
SW
Rear RHDCTY
RCTY
1
1 1J/C
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±719
2001 PRIUS (RM778U)
Door Courtesy Switch Circuit
CIRCUIT DESCRIPTION
The door courtesy switch goes on when the door is opened and goes off when door is closed.
WIRING DIAGRAM
DI7NU±01

I15488
5
8
1
2
11
8
8 A
E DA
AA
AB9
DBKL
IJ1
J22
J23 IJ1J24 J24
2D 2K
IDJ11
J/CG±O
W±B
W±B W±BW±B
W±B W±BG±O
G±O B20
Buckle SW LH
Instrument Panel J/BJ29
J/CBody ECU
J/C
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±721
2001 PRIUS (RM778U)
Driver Buckle Switch Circuit
CIRCUIT DESCRIPTION
When the buckle switch of the driver's seat is ON with the ignition switch ON, the body ECU sends a signal
to make the seat belt warning light for the driver's seat light up and to sound a buzzer.
When the buckle switch of the passenger seat is ON and the passenger seat belt occupant detecting sensor
is ON with the ignition switch ON, the body ECU sends a signal to make the seat belt warning light for the
passenger seat light up.
WIRING DIAGRAM
DI6R2±04

I15487
Body ECU
PBKL 3
9
3
1
10
88B9 IJ1
J24
J25 IJ1
2K2DW±B W±BW±BW±BP±L
P±L
W±B
J11
J/C
IDAAA
Instrument
Panel J/B B21
Buckle SW RH and
Seat Belt Warning
Occupant Detection SW
J/C
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±723
2001 PRIUS (RM778U)
Passenger buckle switch and seat belt warning occupant detec-
tion sensor
CIRCUIT DESCRIPTION
This circuit detects the conditions of the passenger buckle switch and the seat belt warning occupant detec-
tion sensor, and makes the passenger seat belt warning flash.
WIRING DIAGRAM
DI7NR±01

I15495
3 5
26
17
53
2 2
1Y
GU
DSD SU
5
26
1 2
1Y
GU
DSD SU
5
26
1
2 1Y
GU
DSD SU
42
15
101 14 10
5 3
4B8 R±W
G±B
W
B±W
L±O
G±RR±W
G±B
W
B±W
L±O
G±R IN1
IN1
BB1
BA1B8
2J
5K
2L
2LFLU
FLD Body ECU P6
Power Window Control
SW Front RH
P8
Power Window Control
SW Rear RH
P7
Power Window Control
SW Rear LH P11
Power Window
Motor Front RH
P13
Power Window
Motor Rear RH
P12
Power Window
Motor Rear LH
Instrument Panel J/B BB1
BA1RRU
RRD
RLU
RLD
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±731
2001 PRIUS (RM778U)
Power window switch circuit
CIRCUIT DESCRIPTION
Power window switch circuit can be checked using DTC check. (Refer to DI±762)
WIRING DIAGRAM
DI7NX±01

DI2BM±11
I15588
P9 Power Window
Master SW
Instrument Panel J/B
J20
J/C5
1
IG CPUB
B L±Y 1
IG1
C4 W±R
R±L 3
IC1
8
IC1 L±Y L±YC
J25 B
J24 4
2D 2
2G
W±R
R±L
C
R±L 20A PWR1
5A AM1
I15 Ignition SwitchIG1 Relay
IG1 AM1
B±Y W±G11
2J
1
2H
3
2B
24
L±Y
6
2D12 3
510A GAUGE
10
2K
W
15A DOME
7
1J8
2K
Engine Room J/B
2
1BBFL Block No. 1
1
F11100A DC/DC
B±G
F18 FL Block No. 2
120A MAIN 1
F121
F13
1
Battery
ID IGA J11 J/C
W±B
J17 J/CW±B1
IC1
W±B9
E Instrument Panel J/B
AJ/C DI±740
± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
2001 PRIUS (RM778U)
CIRCUIT INSPECTION
Power source circuit
CIRCUIT DESCRIPTION
This circuit provides power to operate the driver door ECU.
WIRING DIAGRAM

I15471
LSWD D13
Door Unlock Detection
Switch Front LH
4
W
10 3 W±B
AIG1 J242P9 Power Window
Master SW
W±B
A J24
Instrument
Panel J/B J11
J/C
ID 8
2D W±BW±B
A 8
2K J/C
± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
DI±743
2001 PRIUS (RM778U)
Door unlock detection switch circuit
CIRCUIT DESCRIPTION
The door unlock detection switch is built in the door lock motor assembly. This switch is ON when the door
lock knob is in the unlock position and OFF when the lock knob is in the lock position. The ECU detects the
door lock knob conditions is this circuit. It is used as one of the operating conditions for the key confinement
prevention function.
WIRING DIAGRAM
DI2BP±08

I15472
KUL D13
Door Key Lock and
Unlock Switch
5 615
3 W±B
AIG1 J242P9 Power Window
Master SW
W±B
A J24
Instrument Panel J/BJ11
J/C
ID 8
2D W±BW±B A 8
2KKL
6 L±B
G±Y UNLOCK
LOCK J/C
± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
DI±745
2001 PRIUS (RM778U)
Door key lock and unlock switch circuit
CIRCUIT DESCRIPTION
The door key lock and unlock switch is built in the door key cylinder. When the key is turned to the lock side,
terminal 3 of the switch is grounded and when the key is turned to the unlock side, terminal 2 of the switch
is grounded.
Door key lock and unlock switch can be checked using DTC check. (Refer to DI±765)
WIRING DIAGRAM
DI2BQ±08

I15474
GR±B4 A7
A/C Amplifier C11
Combination MeterG1
Gateway ECU
B8
Body ECUE11
Engine Control Module
15MP2+
MPX+ GR4 11
3 2
MPX+MPX±
MPX1 MPX±
MPX2MPX1 GR±B
1613
GRGR±L11 14
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±779
2001 PRIUS (RM778U)
DTC B1266 / 66 Instrument panel system communica-
tion bus malfunction (+B short)
DTC B1267 / 67 Instrument panel system communica-
tion bus malfunction (GND short)
CIRCUIT DESCRIPTION
This DTC is output when +B or GND short occurs on instrument panel system communication bus. If +B or
GND short is detected on instrument panel system communication bus, separate it by bus cut relay in body
ECU to prevent while communication buses' failure.
WIRING DIAGRAM
DI7O3±01