2001 TOYOTA SEQUOIA ECU

DIDET±01
I18630
F18PASSENGER DOOR ECU
(w/o Driving Position Memory):
± DIAGNOSTICSPASSENGER DOOR CONTROL SYSTEM
DI±1819
2013 Author: Date:
2005 SEQUOIA (RM1146U)
TERMINALS OF ECU
Symbols (Terminal No.)Wiring ColorTerminal De-
scriptionConditionSpecified Condition
BDR e GND
(20 e 8)L±Y e W±BBatteryAlways10 to 14 V
CPUB e GND
(12 e 8)W±R e W±BBatteryAlways10 to 14 V
SIG e GND
(19 e 8)B±R e W±BIgnition switchIgnition switch ON10 to 14 V
GND e Body Ground
(8 e Body ground)W±B e Body
GroundGroundAlwaysBelow 1 V
PLS e SGND
(17 e 18)L±R e W±BPower window
pulse sensorPower window is operatedPulse generation
PLS e SGND
(17 e 18)L±R e W±BPower window
pulse sensorPower window is not operated (Switch ON)Below 1 V
PLS e SGND
(17 e 18)L±R e W±BPower window
pulse sensorPower window is not operated (Switch OFF)10 to 14 V
LMT e SGND
(16 e 18)L±W e W±BPower window
limit switchFront passenger's door window not fully closed positionBelow 1 V
LMT e SGND
(16 e 18)L±W e W±BPower window
limit switchFront passenger's door window fully closed position10 to 14 V
PU e PDN
(1 e 9)R e GPower window
motor (UP)Ignition switch ON and front passenger's window switch
OFFBelow 1 V
PU e PDN
(1 e 9)R e GPower window
motor (UP)Ignition switch ON and front passenger's window switch
UP10 to 14 V
PDN e PU
(9 e 1)G e RPower window
motor (DOWN)Ignition switch ON and front passenger's window switch
OFFBelow 1 V
PDN e PU
(9 e 1)G e RPower window
motor (DOWN)Ignition switch ON and front passenger's window switch
DOWN10 to 14 V
MPX1 e ±
(10 e ±)B e ±Multiplex com-
munication lineMultiplex communication circuit±
MPX2 e ±
(11 e ±)G±B e ±Multiplex com-
munication lineMultiplex communication circuit±

I18633
F18PASSENGER DOOR ECU
(w/ Driving Position Memory): DI±1820
± DIAGNOSTICSPASSENGER DOOR CONTROL SYSTEM
2014 Author: Date:
2005 SEQUOIA (RM1146U) PKL e LSWE
(3 e 13)
LG±B e W±B
Door key lock
and unlock
switch (LOCK)
Door key lock and unlock switch LOCKBelow 1 V
PKL e LSWE
(3 e 13)LG±B e W±B
Door key lock
and unlock
switch (LOCK)
Door key lock and unlock switch OFF or UNLOCK10 to 14 V
PKUL e LSWE
(2 e 13)LG±R e W±B
Door key lock
and unlock
switch (UN-
LOCK)
Door key lock and unlock switch UNLOCKBelow 1 V
PKUL e LSWE
(2 e 13)LG±R e W±B
Door key lock
and unlock
switch (UN-
LOCK)
Door key lock and unlock switch OFF or LOCK10 to 14 V
LSWP e LSWE
(4 e 13)R±Y e W±BDoor unlock
detection switchFront passenger's door is locked10 to 14 V
LSWP e LSWE
(4 e 13)R±Y e W±BDoor unlock
detection switchFront passenger's door is unlockedBelow 1 V
LSW e GND
(7 e 8)R±L e W±BWindow lock
switchWindow lock switch position UNLOCKBelow 1 V
LSW e GND
(7 e 8)R±L e W±BWindow lock
switchWindow lock switch position LOCK10 to 14 V
CTYB e PCYL
(6 e 5)R e R±WDoor courtesy
light (Front RH)Front passenger's door closed10 to 14 V
CTYB e PCYL
(6 e 5)R e R±WDoor courtesy
light (Front RH)Front passenger's door openBelow 1 V
LSWE e Body ground
(13 e Body ground)W±B e Body
groundGroundAlwaysBelow 1 V
SGND e Body ground
(18 e Body ground)W±B e Body
groundGroundAlwaysBelow 1 V
Symbols (Terminal No.)Wiring ColorTerminal De-
scriptionConditionSpecified Condition
MPX1 e ±
(20 e ±)B e ±Multiplex com-
munication lineMultiplex communication circuitPulse generation
SIG e GND
(21 e 13)B±R e W±BIgnition switchIgnition switch ON10 to 14 V

DI1PS±08
I28391
Power Window Motor

Pulse Sensor

Limit Switch
Door Courtesy Light Switch Power Window Switch Assembly

Passenger Door ECU

Door Lock Control Switch

Power Window Switch
Door Courtesy Light
Passenger door ECU is the same with Power Window Switch
Door Lock Assembly

Door Lock Motor

Door Unlock Detection
Switch Remote Control Mirror
(w/ Driving Position Memory)
Door Key Lock and
Unlock Switch
± DIAGNOSTICSPASSENGER DOOR CONTROL SYSTEM
DI±1825
2019 Author: Date:
2005 SEQUOIA (RM1146U)
PARTS LOCATION

DI1PQ±11
I28436
Instrument Panel J/B
BDR
CPUB
GND W±R
W±B
AW±R Engine Room J/B F10
Fusible Link BlockI18
Ignition SW
IF Battery BB 4 5ALT
8
W1L1AM1
121C6
17
1FW±L1 2 B±YIG1 AM1
1C4 ECU±IG
4
1F B±R AAJ/C
B±R
II27
B±R19
L±Y20
II23
L±Y
1
2D 2C8 SHORT PIN
ECU±B
Sub J/B No. 3
3D
3ASIG
PWR No. 2
Instrument Panel J/B
3
1J2
1E
11
II2
W±B J12
J/C12
8 6
II2 W±RFront Passenger Door ECU
W±R 11F18 J37
B±R
Sub J/B No. 3
3A 3C88J38 F18
F18 F18
F18 F18
F18 F1821
25
23
13 (*1) (*2)
(*1) (*2)
(*1) (*2)
(*1) (*2)
*1: w/ Driving Position Memory
*2: w/o Driving Position Memory DI±1826
± DIAGNOSTICSPASSENGER DOOR CONTROL SYSTEM
2020 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT INSPECTION
Power source circuit
CIRCUIT DESCRIPTION
This circuit provides power to operate the passenger door ECU.
WIRING DIAGRAM

± DIAGNOSTICSPASSENGER DOOR CONTROL SYSTEM
DI±1827
2021 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check ECU±IG, AM1, PWR No. 5 and ECU±B fuse.
CHECK:
Check continuity of the ECU±IG, AM1, PWR No. 5 and ECU±B fuse.
OK:
Continuity
NG Replace the faulty fuse.
OK
2 Check voltage between terminals BDR, CPUB, SIG and GND of passenger door
ECU connector.
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals SIG and GND of the passenger door ECU of the wire harness side
connector.
OK:
Voltage: 10 to 14 V
PREPARATION:
(a) Turn the ignition switch OFF.
(b) Disconnect the passenger door ECU connector.
CHECK:
Measure the voltage between terminals BDR, CPUB and GND of the passenger door ECU of the wire har-
ness side connector.
OK:
Voltage: 10 to 14 V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1818).
NG

DI±1828
± DIAGNOSTICSPASSENGER DOOR CONTROL SYSTEM
2022 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check wire harness and connector between passenger door ECU and battery
(See page IN±35).
NG Repair or replace wire harness or connector.
OK
4 Check wire harness and connector between passenger door ECU and body
ground (See page IN±35).
NG Repair or replace wire harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table
(See page DI±1782).

I28437
D21
Door Unlock Detection
SW Front RH
3 R±Y4
LSWP
LSWE W±B 4Front Passenger
Door ECU
13 24
9 F18 F18
F18 F18
*1: w/ Driving Position Memory
*2: w/o Driving Position Memory(*1) (*2)
(*1) (*2)
± DIAGNOSTICSPASSENGER DOOR CONTROL SYSTEM
DI±1829
2023 Author: Date:
2005 SEQUOIA (RM1146U)
Door unlock detection switch circuit
CIRCUIT DESCRIPTION
The door unlock detection switch is built in the door lock motor. 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 in this circuit. It is used as one of the operating conditions for the key confinement prevention
function.
WIRING DIAGRAM
DI1Q8±09

± DIAGNOSTICSPASSENGER DOOR CONTROL SYSTEM
DI±1831
2025 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check wire harness and connector between door unlock detection switch and
passenger door ECU (See page IN±35).
NG Repair or replace wire harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table
(See page DI±1818).