2001 TOYOTA SEQUOIA O2 sensor

DI57F±07
I28390
Engine Room J/B

ECU±B Fuse
Back Door ECUBack Door Power Window Regulator AssemblyRear Wiper Motor Instrument Panel J/B

ECU±IG Fuse

AM1 Fuse

PWR No. 5 Fuse

Back Door Power Window Motor

Power Window Pulse SensorBack Door Lock Assembly

Back Door Courtesy Light Switch

Unlock Detection Switch

Back Door Lock Motor(Located inside of the back door trim board)
Luggage Room Light
Back Door Key Lock and
Unlock Switch
DI±1860
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
2054 Author: Date:
2005 SEQUOIA (RM1146U)
PARTS LOCATION

I28433
Back Door ECU
DSG B1023
6
2
LG±B B14
Back Door Power
Window Motor
W±R
B1011
DSV 5
3 PLS2
PLS1
SSRBLG±RP
B1017
DS1 B1016
DS2 E
Pulse
Sensor
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
DI±1877
2071 Author: Date:
2005 SEQUOIA (RM1146U)
Back door power window pulse sensor circuit
CIRCUIT DESCRIPTION
Two pulse sensors are built into the back door power window motor. The back door ECU detects movement
and position of the back door window based on information from these pulse sensors.
WIRING DIAGRAM
DI94I±04

DI±1878
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
2072 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:
When using the hand±held tester, start the inspection from step 1 and when not using the hand±held tester,
start from step 2.
1 Check the back door power window pulse sensor using hand±held tester.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON.
CHECK:
According to the display on the tester, read the DATA LIST.
BACK±DOOR:
ItemMeasurement Item/
Display (Range)Normal ConditionDiagnostic Note
P/W POSITION
Back door power win-
dow position/CLOSE
or OPENCLOSE: Back door power window is fully closed
OPEN: Back door power window is opened±
OK:
Indication on the tester switches between CLOSE and OPEN in accordance with the back door
power window status.
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1854).
NG
2 Check back door power window pulse sensor (See page BE±75).
NG Replace the back door power window regulator
assembly.
OK

DIDF7±01
I28466
DLC 3Front
Passenger
Door ECUBody ECU
A/C ECU Combination
MeterBack Door
ECUDriver Door
ECU
MPX1
MPX2
MPX3
Slide Roof
ECU Memory
Seat ECU
& SwitchMPX1 MPX2 MPX1 MPX2 MPX1 MPX2
MPX± MPX+
MPX1 MPX1
SILAutomatic Light
Control Sensor
Wireless Door
Control Receiver
Airbag Sensor Assy
Diagnostic Bus
BEANCLTS
CLTB
CLTE
PRG
GSW
OBD2PDA DI±1888
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2082 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DIAGRAM

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

DI±1906
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2100 Author: Date:
2005 SEQUOIA (RM1146U)B1242
(DI±1933)
Wireless door lock tuner circuit malfunction

Wireless door lock control receiver

Wire harness

Body ECU
B1243
(DI±1935)GSW terminal circuit malfunction

Airbag sensor assembly

Wire harness

Body ECU
B1244
(DI±1937)Light sensor circuit malfunction

Automatic light control sensor

Wire harness

Body ECU
B1262
(DI±1940)A/C ECU communication stop

A/C ECU (Integration control and panel)

Wire harness

Body ECU
B1271
(DI±1943)Combination meter ECU communication stop

Combination meter

Wire harness

Body ECU
B1272
(DI±1946)Memory seat ECU communication stop
(w/ Driving position memory)
Memory seat ECU & switch

Wire harness

Body ECU
B1273
(DI±1949)Sliding roof ECU communication stop
(w/ Sliding roof)
Sliding roof ECU

Wire harness

Body ECU
B1287
(DI±1952)Back door ECU communication stop

Back door ECU

Wire harness

Body ECU
HINT:

When either DTC B1214 or B1215 is output, a DTC for another ECU communication stop may also
be output. In this case, perform troubleshooting for DTC B1214 or B1215 first. DTC B1214 or B1215
is output when a short to +B or short to ground occurs on a communication bus.

DTCs from B1221 to B1241 do not indicate that the corresponding switch is abnormal. They notify how
the switch is operating.
If the corresponding DTC is not indicated when operating a switch, there is a problem with the switch
contact.
If a DTC is indicated when not operating switches, the corresponding switch is stuck.

DI3IS±11
I27730
Instrument Panel J/B
Passenger Door ECU
(Power Window Switch) Combination Meter
Sliding Roof ECUDLC3 Body ECU
(Located behind
the instrument panel)
Driver Door ECU
(Power Window
Master Switch)
Back Door ECU
(Located inside the back door trim board) Automatic Light Control Sensor
Memory Seat ECU
& SwitchAirbag
Sensor
Assy
Power Window
Motor Front RH

Limit Switch

Pulse Switch Power Window
Motor Front LH

Limit Switch

Pulse Switch
A/C ECU
(Integration Control and Panel)
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±1907
2101 Author: Date:
2005 SEQUOIA (RM1146U)
PARTS LOCATION

I26946
Airbag Sensor Assembly Body ECU
A2018
GSW16
B6GSW Instrument Panel J/B
1A7
1B3
GR±R
B
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±1935
2129 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1243 GSW terminal circuit malfunction
CIRCUIT DESCRIPTION
This DTC is indicated when open or ground short of the GSW terminal is detected.
DTC No.DTC Detection ConditionTrouble Area
B1243Open or ground short of GSW circuit

Airbag sensor assembly

Wire harness

Body ECU
WIRING DIAGRAM
DI1T3±09