2001 TOYOTA SEQUOIA wiring diagram

DI±1496
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1690 Author: Date:
2005 SEQUOIA (RM1146U)
SRS Warning Light Circuit Malfunction (Does not light up, when
ignition switch is turned to on)
CIRCUIT DESCRIPTION
The SRS warning light is located on the combination meter assembly.
When the SRS is normal, the SRS warning light comes on for approximately 6 seconds after the ignition
switch is turned from the LOCK position to the ON position, and then goes off automatically.
If there is a malfunction in the SRS, the SRS warning light comes on to inform the driver of a problem.
When terminals TC and CG of the DLC3 are connected, the DTC is displayed by blinking the SRS warning
light.
WIRING DIAGRAM
See page DI±1491.
INSPECTION PROCEDURE
CAUTION:
Be sure to perform the following procedures before troubleshooting to avoid unexpected airbag de-
ployment.
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (±) terminal cable from the battery, and wait for at least 90 seconds.
(c) Disconnect the connectors from the airbag sensor assembly.
(d) Disconnect the connectors from the steering wheel pad.
(e) Disconnect the connectors from the front passenger airbag assembly.
(f) w/ Side and curtain shield airbag:
Disconnect the connectors from the side airbag assembly LH and RH.
(g) w/ Side and curtain shield airbag:
Disconnect the connectors from the curtain shield airbag assembly LH and RH.
(h) Disconnect the connectors from the front seat outer belt LH and RH.
1 Check battery.
CHECK:
Measure the voltage of the battery.
OK:
Voltage: 11 to 14 V
NG Replace battery.
OK
DIDHV±01

H24006
Airbag Sensor
Assembly
TC 15
P±B
A20 G Instrument Panel J/B Sub J/B No. 4
D6
DLC3 5
4D 5
4E
5
4B
5
4C5
4A P±B
P±B
P±B P±B 23
E4 ECM
TC
T5
Translate ECU
T17
Tire Pressure Monitor ECUTC
TC28
12 13TC
CG
4O
A
J43
J/C
IGA
O 9
1A 15
1F DI±1498
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1692 Author: Date:
2005 SEQUOIA (RM1146U)
TC Terminal Circuit
CIRCUIT DESCRIPTION
DTC output mode is set by connecting terminals TC and CG of the DLC3.
The DTCs are displayed by blinking of the SRS warning light.
WIRING DIAGRAM
HINT:
When each warning light stays blinking, a ground short in the wiring of the terminal TC of the DLC3 or an
internal ground short in each ECU is suspected.
DIDHW±01

I28446
B±R
W±B W±RW±L
W±B W±RW±RW±R
W±R B±R
B±R B±R
W±R L±O L±O L±O
L±O
B±Y B±R
L±O
1 2
34 5
68
5
4A
B CF
I
W
B A
A A
BB
W±B 8 11
3L CG
1C
1E 1F
1G
1J
2C 2D3A 3C
1L
1C 3A 3A
4
164
12 219
15 16 88Sub J/B No. 3J/C
J/CJ24 J/C
J/C
111Sub J/B No. 3J31 J32
J37 J38 J33 J34
J33 J34
J24 J/C Instrument Panel J/B
I18
Ignition SW
Engine Room J/B F10
FL Block
ALT
8BI2 M7
M6
M6 BI2
BI2Position Control
ECU & Switch
+B
IG
SYSB
GND 1
2
BI2
Battery
BHAM1 AM1 PWR SEATECU±IG
IG1
M7 ECU±B Short Pin
± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI±1515
1709 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

I28447
D24
Seat Memory SwitchBody ECU
SET
4 3 2 1
W±BL
L±Y
G23
22 24
B6
AM1
M2 MM
B6
B6 1
2
EJ8 J/C
IE M1
M2 MRY DI±1518
± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)
1712 Author: Date:
2005 SEQUOIA (RM1146U)
Memory switch circuit
CIRCUIT DESCRIPTION
The seat memory switch sends signals to the position control ECU & switch assy via multiplex communica-
tion to memorize a given seat position. This memory system does not use a position sensor. The seat posi-
tion is detected by counting pulses that are output when the motor turns. If there is no pulse output from the
motor, the motor will stop operating. The seat memory switch is later used to send signals to the position
control ECU to return to one of the memorized positions.
The power seat memory operation is performed only when the ignition switch is in the ON position and the
park/neutral position switch is in the P (park) position.
WIRING DIAGRAM
DIDE8±01

I28448
PWR SEAT Instrument Panel J/B
ALT 161
1 2L±O L±O
BI29L4
Lumbar Support Control
Switch (Driver's Seat)
3 1 2
4
5 Rear Front
W
W±B W±B
BH BatteryLR1 L A
A
BI2 1G
1L
F10
FL BlockJ24 J/C
L3
Lumbar Support
Control Motor L±O
J24 J/C J/C
L±O
J31 J323
R B
H
B58C
G
BBB 2
W±B W±BE2E
± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI±1521
1715 Author: Date:
2005 SEQUOIA (RM1146U)
Lumbar support control switch circuit
CIRCUIT DESCRIPTION
The lumbar support control switch that controls lumbar support is connected to the lumbar support control
motor via a wire harness. This circuit can freely operate regardless of the condition of the ECU.
WIRING DIAGRAM
DIDE9±01

I28449
Position Control
ECU & Switch
SLD± SLD+ FRV± FRV+
LFT± LFT+RCL± RCL+ 2 1
21
21
2 13 M7
M7
M7
M7
M7
M7
M7
M724 6
9 7 108
BR P14
Power Seat Motor
(Driver's Seat Front Vertical Control)
P16
Power Seat Motor
(Driver's Seat Reclining Control)P
V W B G
Y L P15
Power Seat Motor
(Driver 's Seat Rear Vertical Control)
P17
Power Seat Motor
(Driver's Seat Slide Control)
± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI±1525
1719 Author: Date:
2005 SEQUOIA (RM1146U)
Power seat motor circuit
CIRCUIT DESCRIPTION
When the power seat control switch is operated, a command signal is sent to the position control ECU. The
position control ECU then controls the appropriate seat motor as needed. This memory system does not use
a seat position sensor. The seat position is detected by counting pulses that are output when the motor turns.
If there is no pulse output from the motor, the motor will stop operating. The ECU is designed so that a mal-
function of the seat memory system will not interfere with manual seat control.
When the position control ECU switch assy detects the low motor speed or abnormal activity, the system
stops the motor. When the motor continuously operates for 120 seconds or more, the system will stop the
motor until the switch is turned off.
WIRING DIAGRAM
DIDEB±01

I28451
BatteryJ/C
I18
Ignition SW
1
2
AM1IG1
5W BF10
FL Block
ALT
81L 1CInstrument Panel J/B
7 J52 J51
21AM1
6
1C4
1 78 L±Y1
MPX1 M6 WW
C5 C53430 Combination MeterPosition Control
ECU & Switch
P
L±Y
L±R
L±R CCPL RB 62 P1
Park/Neutral
Position Switch
B±Y
W±LGAUGEIPOIG49 BEAN
1D DI±1528
± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)
1722 Author: Date:
2005 SEQUOIA (RM1146U)
Park/neutral position switch circuit
CIRCUIT DESCRIPTION
The power seat memory system operates only when the ignition switch is in the ON position and the park/
neutral position is in the P (park) position.
The position control ECU & switch assy detects the P position, via multiplex communication, through the
park/neutral position switch.
WIRING DIAGRAM
DIDEC±01

I28450
MPX1 M61
12
B7
GR±R
1
D14
Door Courtesy Light
Switch Front LHGR±RBEAN
24
B5
DCTY J/C
J29
J30
NGBody ECUPosition Control
ECU & Switch
MPX2
± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI±1533
1727 Author: Date:
2005 SEQUOIA (RM1146U)
Door courtesy switch circuit
CIRCUIT DESCRIPTION
The position control ECU & switch assy detects the open/close condition of the driver's door, via multiplex
communication, through the front door courtesy light switch.
WIRING DIAGRAM
DIDEE±01