2001 TOYOTA SEQUOIA ECU

DIDEK±01
I28584
From
Battery
From
Ignition Switch To Rear
Power Window
SW RH PWR No. 3
Power Main
Driver Door ECU
(Power Window Master Switch)To Rear
Power Window
SW LH PWR No. 4From
Battery From
Battery
ECU±IG
PWR No.1
ECU±B IG +BSIG
BDR
CPUB
CPU
Window
Lock
Switch WLSW
MPX1
GND
MPX2 Passenger
Door ECU
Body ECUDriver Door Power Window Motor
DOWN
UP
Pulse Sensor
Limit Switch DU
DDN
PLS
LMT
SGND
CTYB
Driver Side Door
Courtesy LightRemote Control Mirror LH
DM+R
DMHR
DMVRLEFT
RIGHT
DOWN UP
DVC
VSSR
HSSR
LE1 LSWD
KL
KUL
BEAN Door Unlock
Detection Switch
Door Key Lock and
Unlock Switch
LSWEDOWN
UPOUT
IN PCYLEngine Room J/B
± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
DI±1779
1973 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DIAGRAM

DI1P8±07
Customer Problem Analysis
Vehicle Brought to Workshop
Problem Symptom ConfirmationSymptom Simulation Symptom does not
occur
Circuit Inspection
Identification of Problem
Repair
Confirmation Test
EndTitles inside
are titles of pages in this
manual, with the page number indicated in
the bottom portion. See the indicated pages
for detailed explanations.
1
23
65
8P. IN±24
P. DI±1904 P. DI±1781
P. DI±1788 ± DI±1813
Symptom
occurs
Step 6, 8: Diagnostic steps permitting use of the hand±held tester. 7
Multiplex Communication System Inspection * 4
Problem Symptoms Table
P. DI±1782
*: Confirm that there is no trouble by
DTC check.
DI±1780
± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
1974 Author: Date:
2005 SEQUOIA (RM1146U)
HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
This ECU is connected to the multiplex communication system. Therefore, be sure to check that there is no
trouble in the multiplex communication system before performing the troubleshooting.

DI1PC±06
DI±1782
± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
1976 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
POWER WINDOW CONTROL SYSTEM
SymptomSuspected AreaSee page
All the power windows do not operate.
4. Power source circuit
5. Window lock switch circuit
6. Body ECUDI±1788
DI±1805
IN±35
Power window does not operate.
1. Power source circuit
2. Power window motor circuit
3. Window lock switch circuit
4. Driver door ECUDI±1788
DI±1798
DI±1805
IN±35
Auto up (or down) function does not operate.1. Power source circuit
2. Driver door ECUDI±1788
IN±35
Jam protection function and auto up (or down) function do not
operate.1. Jam protection limit switch circuit
2. Jam protection pulse sensor circuit
3. Driver door ECUDI±1800
DI±1803
IN±35
OTHER
SymptomSuspected AreaSee page
Door parts do not function.1. Power source circuit
2. Driver door ECUDI±1788
IN±35
Door key related function does not operate.1. Door key lock and unlock switch circuit
2. Driver door ECUDI±1794
IN±35
Courtesy light does not come on.
(driver's)1. Door courtesy light circuit
2. Driver door ECUDI±1796
IN±35
Remote control mirror LH does not operate.
(w/ Driving position memory)1. Remote control mirror motor LH circuit
2. Remote control mirror position sensor LH circuit
3. Driver door ECUDI±1808
DI±1810
IN±35
Door lock control does not operate.
1. Door unlock detection switch circuit
2. Door lock motor circuit
3. Driver door ECUDI±1791
DI±1720
IN±35

DI1PB±09
I18633
D22
DRIVER DOOR ECU :
± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
DI±1783
1977 Author: Date:
2005 SEQUOIA (RM1146U)
TERMINALS OF ECU
Symbols (Terminal No.)Wiring ColorTerminal DescriptionConditionSpecified Condi-
tion
CPUB e GND
(23 e 13)W±R e W±BBatteryAlways10 to 14 V
BDR e GND
(25 e 13)L±W e W±BBatteryAlways10 to 14 V
CTYB e DCYL
(5 e 6)R e R±WCourtesy switch driver
sideDriver's door closed10 to 14 V
CTYB e DCYL
(5 e 6)R e R±WCourtesy switch driver
sideDriver's door openBelow 1 V
SIG e GND
(21 e 13)B±R e W±BIgnition switchIgnition switch ON10 to 14 V
GND e Body Ground
(13 e Body Ground)W±B e Body
GroundGroundAlwaysBelow 1 V
PLS e SGND
(3 e 4)L±R e W±BPower window pulse
sensorPower window is operatedPulse
Generation
PLS e SGND
(3 e 4)L±R e W±BPower window pulse
sensorPower window is not operated (Switch ON)Below 1 V
PLS e SGND
(3 e 4)L±R e W±BPower window pulse
sensorPower window is not operated (Switch OFF)10 to 14 V
LMT e SGND
(2 e 4)L±Y e W±BPower window limit
switchDriver's door window not fully closed positionBelow 1 V
LMT e SGND
(2 e 4)L±Y e W±BPower window limit
switchDriver's door window fully closed position10 to 14 V
DU e DDN
(1 e 14)R e GPower window motor
(UP)Ignition switch ON and driver's window switch OFFBelow 1 V
DU e DDN
(1 e 14)R e GPower window motor
(UP)Ignition switch ON and driver's window switch UP10 to 14 V
DDN e DU
(14 e 1)G e RPower window motor
(DOWN)Ignition switch ON and driver's window switch OFFBelow 1 V
DDN e DU
(14 e 1)G e RPower window motor
(DOWN)Ignition switch ON and driver's window switch DOWN10 to 14 V
MPX1 e ±
(20 e ±)G±B e ±Multiplex communica-
tion lineMultiplex communication circuit±

DI±1786
± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
1980 Author: Date:
2005 SEQUOIA (RM1146U)
*1: When the ignition key is not in the key cylinder and the back door is locked, turning and holding the key
in the back door key cylinder in the lock position for 1.5 seconds or more activates the driver door ECU to
operate the power window motor and close the power window.
Similarly, turning and holding the key in the back door key cylinder in the unlock position for 1.5 seconds or
more when the back door is unlocked will open the power window.
ItemMeasurement Item/Display (Range)Normal ConditionDiagnostic Note
MIR POS SEN VVertical mirror position/Min.: 0, Max.: 5Within range from 0 to 5 V±
MIR POS SEN HVertical mirror position/Min.: 0, Max.: 5Within range from 0 to 5 V±
2. ACTIVE TEST
HINT:
Performing the ACTIVE TEST using the hand±held tester allows the relay, actuator and so on to operate
without removal. Performing the ACTIVE TEST as the first step of troubleshooting is one of the methods to
shorten labor time.
It is possible to display the DATA LIST during the ACTIVE TEST.
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON.
(c) According to the display on the tester, perform the ACTIVE TEST.
D±DOOR:
ItemTest DetailsDiagnostic Note
P/W UP/DOWNDrive the P/W Motor UP/DOWN
During this ACTIVE TEST, jam protection, caught
detection can be monitored.
(Refer to the DATA LIST for details)
MIRR UP/DOWNMirror motor vertical operation UP/OFF/DOWN±
MIRR RIGHT/LEFTMirror motor horizontal operation RIGHT/OFF/
LEFT±

DI1PA±08
I28392
Power Window Master Switch
 Driver Door ECU
 Power Window Switch
 Door Lock Control Switch
 Window Lock Switch
Door Courtesy LightDoor Lock Assembly
 Door Lock Motor
 Door Unlock Detection
Switch Power Window Motor
 Pulse Sensor
 Limit Switch
Door Courtesy Light Switch
Driver door ECU is the same with power window master switch.
Door Key Lock and
Unlock Switch Remote Control Mirror
(w/ Driving Position Memory)
± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
DI±1787
1981 Author: Date:
2005 SEQUOIA (RM1146U)
PARTS LOCATION

DI1PD±10
I28457
F10
Fusible Link Block
Engine Room J/B
Sub J/B No. 3
SHORT PIN
D22
Driver Door ECU
SIG 21 A
W±LB±R 9
IB1 J/C
W±R ECU±B
Battery
IEB±R A
B±RInstrument Panel J/B
ECU±IG 4
1FI18
Ignition SW
IG1 AM1 4
1C
B±Y21
6
1C AM1
ALT
L±WPWR No. 12 1 1
1L
1
1F 58
W
4
B
13
IB1L±W
BDR
CPUB
GND Instrument Panel J/B
2
1E 3
1J 8
2C 1
2D
W±R 1
3A 1
3C
W±R1
IB1W±R
23 B
A J8
J/C
W±BJ/C
D
J6F
J7W±B
13 25 B±RJ37 J38
Sub J/B No. 3
3A 3C88 DI±1788
± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
1982 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT INSPECTION
Power source circuit
CIRCUIT DESCRIPTION
This circuit provides power to operate the driver door ECU.
WIRING DIAGRAM

± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
DI±1789
1983 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check ECU±IG, AM1, PWR No. 1 and ECU±B fuse.
CHECK:
Check continuity of the ECU±IG, AM1, PWR No. 1 and ECU±B fuse.
OK:
Continuity
NG Replace the faulty fuse.
OK
2 Check voltage between terminals BDR, CPUB, SIG and GND of driver door ECU
connector.
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals SIG and GND of the driver door ECU of the wire harness side con-
nector.
OK:
Voltage: 10 to 14 V
PREPARATION:
(a) Turn the ignition switch OFF.
(b) Disconnect the driver door ECU connector.
CHECK:
Measure the voltage between terminals BDR, CPUB and GND of the driver door ECU of the wire harness
side connector.
OK:
Voltage: 10 to 14 V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1782).
NG