2001 TOYOTA SEQUOIA door lock

I28468
MPX2MPX1 D22
Driver Door ECU
Back Door ECU
IB1F18
Passenger
Door ECU
J/CII2
BF1 BD2 B11
J37 J38J/CJ34 J33 II2
II2MPX2
MPX1
SIG
BDR
GND F18 F18
F18 F18
F18 F18
F18 F18
F18 F18
F18 F18 G±B
B
B±R G±B G±B
BB B B
B±R
B±R
B±R B±Y
W±L
L±Y
L±Y
B
W±R
W±R
W±R
W±R
W±B A J12
J/C
Battery
IFII2
II2 Sub J/B No. 3
3D 3A11
611
13 8(*1) (*2) 23 12(*1) (*2) 2520
(*1)(*2) 21 19(*1) (*2) 20 10(*1) (*2) 811(*1) (*2)
Engine Room J/B
ECU±B
Short Pin
2D 2C18Instrument Panel J/B
1E 1J2 3II2 F10
Fusible Link Block
ALT
48 5Instrument Panel J/B
ECU±IG
AM1
PWR No. 2 1F 1C
1L 1C
1F 44
1
176
12 Sub J/B No. 3
3C 3A88I18
Ignition SW
IG1 AM14 8
8 2 1
14AG
2 7
(*1): w/ Driving Position Memory
(*2): w/o Driving Position Memory20
AA
3
B1
W±BCPUB W DI±1912
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2106 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

DI±1924
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2118 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1221 Power window switch circuit on driver
door
CIRCUIT DESCRIPTION
This DTC is output only if the power window master switch AUTO UP/DOWN operation is performed.
If the DTC is not output, the following may be malfunctioning:
DTC No.DTC Detecting ConditionTrouble Area
B1221Does not operate either of the power window master switch
(except window lock switch)
Power window master switch (Built in driver door ECU)

Wire harness

Body ECU
HINT:
For details of inspection, see page DI±1782.
If the problem reoccurs even after replacement, replace the body ECU.
DI1SP±08

± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±1925
2119 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1222 Door lock switch circuit on driver door
CIRCUIT DESCRIPTION
This DTC is output while the body ECU senses the door unlock state through the door unlock detection
switch, which is built into the door lock motor.
If the DTC is not output, the following may be malfunctioning:
DTC No.DTC Detecting ConditionTrouble Area
B1222Does not operate door key lock and unlock switch

Door lock control switch front LH (Built in driver door ECU)

Door unlock detection switch front LH

Wire harness

Body ECU
HINT:
For details of inspection, see page DI±1782.
If the problem reoccurs even after replacement, replace the body ECU.
DIDFD±01

DI±1926
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2120 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1223 Power window switch circuit on pas-
senger door
CIRCUIT DESCRIPTION
This DTC is output only if the power window switch AUTO UP/DOWN operation is performed.
If the DTC is not output, the following may be malfunctioning:
DTC No.DTC Detecting ConditionTrouble Area
B1223Does not operate power window switch or door lock control

Power window switch (Built in passenger door ECU)

Wire harness

Body ECU
HINT:
For details of inspection, see page DI±1818.
If the problem reoccurs even after replacement, replace the body ECU.
DIDFE±01

± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±1927
2121 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1224 Door lock switch circuit on passenger
door
CIRCUIT DESCRIPTION
This DTC is output while the body ECU senses the door lock state through the door unlock detection switch,
which is built into the door lock motor.
If the DTC is output, the following may be malfunctioning:
DTC No.DTC Detecting ConditionTrouble Area
B1224Does not operate door key lock and unlock switch

Door lock control switch front RH
(Built in passenger door ECU)

Door unlock detection switch front RH

Wire harness

Body ECU
HINT:
For details of inspection, see page DI±1818.
If the problem reoccurs even after replacement, replace the body ECU.
DIDFF±01

I15555
Body ECU W2
Wireless Door Lock
Control Receiver
2PRG
RDA 4 5
V
R±G 3
B5 PRG
RDAB5
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±1933
2127 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1242 Wireless door lock tuner circuit mal-
function
CIRCUIT DESCRIPTION
This DTC is indicated when ground short of the RDA terminal is detected.
DTC No.DTC Detecting ConditionTrouble Area
B1242Ground short of RDA circuit

Wireless door lock control receiver

Wire harness

Body ECU
WIRING DIAGRAM
DI638±10

I03347
ReceiverBody ECU RDA W2
B5
I03348
Body ECU Receiver
DI±1934
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2128 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check wire harness and connector (Wireless door lock control receiver ± body
ECU).
PREPARATION:
Disconnect the receiver and body ECU connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester connection
(Symbol)ConditionSpecification
B5±4 (RDA) ±
Body groundAlways10 kW or higher
NG Repair or replace the wire harness.
OK
2 Check body ECU.
PREPARATION:
Reconnect the body ECU connector.
CHECK:
Check the DTC (See page DI±1904).
OK:
DTC B1242 is not indicated.
HINT:
Ignore any codes other than DTC B1242.
NG Replace the body ECU.
OK
Replace the wireless door lock control re-
ceiver.

I28470
Back Door ECUCombination Meter
I19
A/C ECU
(Integration Control and Panel)
Instrument Panel J/B
I18
Ignition SW
Engine Room J/B
Instrument Panel J/B
J8
J/C F10
Fusible
Link Block
Battery
IEC6 B11
BF1BD2
J34J33C5
C5
C6 1J
1C1D
1H
1J 1C
2C 2D
2C
1D 1F C6 Short Pin
ECU±B
AM2IGN1
IG2 AM2MPX1
MPX±LG±B LG±RLG±R
LG±R
LG±B
W±R
B±O W±R
B±R
W±R W±R
W±R
W±R
W±B
BR B
BABH 231
32
23
24 67
13
3
29
11
5 637
1 8
1
9
612
5 4J/C DI±1944
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2138 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM