2001 TOYOTA SEQUOIA terminal TC

I28443
F18
Front Passenger Door ECUD22
Driver Door ECU
WLSW 7
R±L E
J7 J/C
E
J6
R±L
R±LII15
LSW7
± DIAGNOSTICSPASSENGER DOOR CONTROL SYSTEM
DI±1843
2037 Author: Date:
2005 SEQUOIA (RM1146U)
Window lock switch circuit
CIRCUIT DESCRIPTION
The power window lock switch circuit can be checked using the DTC check (refer to DI±1904).
The window lock switch is built in the passenger door ECU. Voltage applied to the LSW terminal of the pas-
senger door ECU is shut off when the window lock switch is turned to the LOCK position. The power main
relay stops power supply to the other power window control switches.
WIRING DIAGRAM
DI1PE±16

DID9F±01
DI±1850
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
2044 Author: Date:
2005 SEQUOIA (RM1146U)
BACK DOOR CONTROL SYSTEM
PRECAUTION
NOTICE:
When disconnecting the battery terminal, initialize the following system after the terminal is recon-
nected.
System NameSee Page
Back Door Power Window Control SystemBE±77

DID9H±01
I18655
BACK DOOR ECU:
B11
B10
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
DI±1855
2049 Author: Date:
2005 SEQUOIA (RM1146U)
TERMINALS OF ECU
Symbols (Terminal No.)Wiring ColorTerminal De-
scriptionConditionSpecified Condition
BDR e GND
(B11±4 e B11±3)L±W e W±BBatteryAlways10 to 14 V
BECU e GND
(B11±5 e B11±3)W±R e W±BBatteryAlways10 to 14 V
SIG e GND
(B11±6 e B11±3)B±R e W±BIgnition switchIgnition switch OFFBelow 1.0 V
SIG e GND
(B11±6 e B11±3)B±R e W±BIgnition switchIgnition switch ON10 to 14 V
LGLP e GND
(B11±7 e B11±3)R±L e W±BLuggage room
lightLuggage room light switch OFF or ONBelow 1.0 V
LGLP e GND
(B11±7 e B11±3)R±L e W±BLuggage room
lightLuggage room light switch DOOR, any door open10 to 14 V
BDCY e CTYE
(B10±7 e B10±20)R e W±BBack door cour-
tesy light switchBack door courtesy ON (Back door Open)Below 1.0 V
BDCY e CTYE
(B10±7 e B10±20)R e W±BBack door cour-
tesy light switchOFF (Back door Close)10 to 14 V
BKUL e KEYE
(B10±4 e B10±19)G e R±W
Back door key
lock and unlock
switch (UN-
LOCK)
Back door key lock and unlock switch UNLOCKBelow 1.0 V
BKUL e KEYE
(B10±4 e B10±19)G e R±W
Back door key
lock and unlock
switch (UN-
LOCK)
Back door key lock and unlock switch OFF or LOCK10 to 14 V
BKL e KEYE
(B10±5 e B10±19)L e R±W
Back door key
lock and unlock
switch (LOCK)
Back door key lock and unlock switch LOCKBelow 1.0 V
BKL e KEYE
(B10±5 e B10±19)L e R±W
Back door key
lock and unlock
switch (LOCK)
Back door key lock and unlock switch OFF or UNLOCK10 to 14 V
BDUP e BDDN
(B10±13 e B10±25)P e W
Back door pow-
er window motor
(UP)
Back door power window not operatingBelow 1.0 V

DI±1862
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
2056 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check PWR No. 5, ECU±B, AM1 and ECU±IG fuse.
CHECK:
Check continuity of the PWR No. 5, ECU±B, AM1 and ECU±IG fuse.
OK:
Continuity
NG Replace the faulty fuse.
OK
2 Check voltage between terminals, SIG, BDR, BECU and GND of back door ECU
connector.
PREPARATION:
(a) Turn the ignition switch ON.
(b) Disconnect the back door ECU connector.
CHECK:
Measure the voltage between terminals SIG, and GND of the back door ECU of the wire harness connector.
OK:
Voltage: 10 to 14V
PREPARATION:
Turn the ignition switch OFF.
CHECK:
Measure the voltage between terminals BDR, BECU and GND of the back door ECU of the wire harness
connector.
OK:
Voltage: 10 to 14V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1854).
NG

I28431
Back Door ECU
ILE B118
2 1
R±L S8
Step Light
LGLP
B117 BF18
BD29
W W
W
W
WR
R
R
R
R
R
R B
BAA 1G6
1G13
1G14
1E8
1J5
2C3
2D1SHORT PIN
DOME
4
5F10
FL Block
Battery3C
3A J21
J/C
BD211
2R±L BF13 L2
Luggage Room Light Instrument Panel J/B
Engine Room J/BInstrument Panel J/B
DOOR
ONOFF J29
J/C
MF
J29J30
6
16 Sub J/B No. 3
2
IN1
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
DI±1867
2061 Author: Date:
2005 SEQUOIA (RM1146U)
Luggage Room Light Circuit
CIRCUIT DESCRIPTION
When the luggage room light and the rear room light are turned to the DOOR position, and any door is
opened, voltage is applied to the LGLP terminal of the back door ECU, and voltage is output from the ILE
terminal.
WIRING DIAGRAM
DI57L±11

I28432
Back Door ECU
B10
B1025
13 4
1W
P B14
Back Door
Power Window Motor
BDDN
BDUP D
U DI±1874
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
2068 Author: Date:
2005 SEQUOIA (RM1146U)
Back door power window motor circuit
CIRCUIT DESCRIPTION
The back door power window goes down when voltage is applied to the BDDN terminal of the back door
ECU, and the window goes up when voltage is applied to the BDUP terminal.
WIRING DIAGRAM
DI94H±05

DIDF6±01
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±1887
2081 Author: Date:
2005 SEQUOIA (RM1146U)
MULTIPLEX COMMUNICATION SYSTEM
PRECAUTION
NOTICE:
When disconnecting the battery terminal, initialize the following system after the terminal is recon-
nected.
System NameSee Page
Back Door Power Window Control SystemBE±77

DIDFA±01
I27698
B5
B6B7
DI±1894
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2088 Author: Date:
2005 SEQUOIA (RM1146U)
TERMINALS OF ECU
1. CHECK BODY ECU
(a) Disconnect the B5, B6 and B7 ECU connectors.
(b) Measure the resistance or voltage of each terminal of the wire harness side connector.
Standard:
Symbols (Terminal No.)Wiring ColorTerminal DescriptionConditionSpecified Condition
BDR (B6±2) ±
Body groundL±W ± Body ground+B (BATT) power supplyAlways10 to 14 V
IG (B7±6) ± Body groundB±R ± Body groundIgnition power supplyIgnition switch ON10 to 14 V
ACC (B7±10) ±
Body groundGR ± Body groundACC power supplyIgnition switch ACC10 to 14 V
OBD2 (B5±2) ±
Body groundG±R ± Body groundBus º+º lineDuring transmissionPulse generation
S+B (B6±1) ± Body groundW±L ± Body ground+B (BATT) power supplyAlways10 to 14 V
BECU (B6±5) ±
Body groundW±R ± Body ground+B (BATT) power supplyAlways10 to 14 V
WIG (B7±5) ± Body groundL±Y ± Body groundIgnition power supplyIgnition switch ON10 to 14 V
MPX3 (B7±20) ±
Body groundG±O ± Body groundMPX lineAlways10 kW or higher
MPX2 (B5±24) ±
Body groundL±Y ± Body groundMPX lineAlways10 kW or higher
MPX1 (B7±22) ±
Body groundW±L ± Body groundMPX lineAlways10 kW or higher
GND1 (B6±6) ±
Body groundW±B ± Body groundGroundAlwaysBelow 1 W
PRG ± GND1
(B5±5 ± B6±6)V ± W±BWireless transmitter signal
groundWireless door look receiver
communication circuit±
RDA ± GND1
(B5±4 ± B6±6)R±G ± W±BWireless transmitter signal
inputWireless door lock control
system is operatedBelow 1 V
RDA ± GND1
(B5±4 ± B6±6)R±G ± W±BWireless transmitter signal
inputWireless door lock control
system is not operated10 to 14 V
GSW
(B6±16)GR±RAir bag sensor commu-
nication signalAir bag sensor commu-
nication circuit±
CLTS (*1) ± GND1
(B6±12 ± B6±6)Y ± W±BAutomatic light control sen-
sor (Signal)Ignition switch OFFBelow 1 V
CLTS (*1) ± GND1
(B6±12 ± B6±6)Y ± W±BAutomatic light control sen-
sor (Signal)Ignition switch ONSignal waveform
CLTE (*1) ± GND1
(B6±3 ± B6±6)BR ± W±BAutomatic light control sen-
sor (Ground)AlwaysBelow 1 V