TOYOTA SEQUOIA 2001 Service Repair Manual

± DIAGNOSTICSPASSENGER DOOR CONTROL SYSTEM
DI±1849
2043 Author: Date:
2005 SEQUOIA (RM1146U)
Power window switch circuit
CIRCUIT DESCRIPTION
The power window switch circuit can be checked using the DTC check (refer to DI±1904).
INSPECTION PROCEDURE
1 Check the power window switch 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.
P±DOOR:
ItemMeasurement Item/Dis-
play (Range)Normal conditionDiagnostic Note
P P/W AUTO SW
Front passenger power
window auto SW signal/
ON or OFFON: Front passenger power window auto UP/DOWN SW
is ON
OFF: Front door power window auto UP/DOWN SW is
OFF
±
OK:
Indication on the tester switches between ON and OFF in accordance with the window auto up
operation status.
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1818).
NG
Replace the passenger door ECU.
DI94M±05

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

DID9G±01
I28586
From
Battery
From
Battery
From
Battery
From
DOME
FuseBack Door ECU
PWR No. 5
IG Switch
Luggage Room Light
BODY ECUECU±B
ECU±IG
Back Door Key Lock and Unlock Switch
Back Door Lock Assy
Back Door Unlock
Detection Switch
Back Door Courtesy
Light Switch
Back Door
Lock MotorDOOR
ONBRD
BECU
SIG
LGLP
ILE
BKUL
BKL
KEYE
LSWB
LSWE
BDCY
CTYE
ACT+
ACT±WIP+
WIP±
W
P
SGND
BDDN
BDUP
DSV
DS1
DS2
DSGBEAN
Driver Door
ECU
Rear Wiper Motor
Wiper
Motor
Reverse Position SW
String Position SW
Back Door Power Window Motor
Window
Motor
*1: Pulse Sensor*1*1 A/C ECU BEANBEAN
BEAN
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
DI±1851
2045 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DIAGRAM

DI57D±06
Customer Problem Analysis
Vehicle Brought to Workshop
Problem Symptom ConfirmationSymptom Simulation Symptom does not
occur
Circuit Inspection
Identification of Problem
Repair or replace
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
5
8P. IN±24 P. DI±1853
P. DI±1861 ± DI±1885
Symptom
occurs
Step 4, 6, 8: Diagnostic steps permitting use of the hand±held tester. 7
Problem Symptoms Table
P. DI±1854
P. DI±1904
Multiplex communication system inspection * 4*: Confirm that there is no trouble by
DTC check.
6 DI±1852
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
2046 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.

DI57E±04
BACK DOOR CONTROL SYSTEM Check Sheet
Inspector 's name:
Customer 's Name
Date VehicleVIN
Licence Plate No.
Production Date
Odometer Reading / /km
mile
Weather Conditions
When Problem
Occurred
Date Problem First Occurred
Frequency Problem Occurs
Weather
/ /
Once only Brought in
Malfunction
System
Outdoor Temperature
Fine Cloudy Rainy Snowy
Various/Others
Hot Warm Cool
Cold (Approx. °F ( °C))
Constant Sometimes ( times per day, month)
Power Door Lock Control System
Theft Deterrent System
Rear Wiper and Washer System
Back Door Power Window System
Luggage Room Light
Jam Protection System
Other
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
DI±1853
2047 Author: Date:
2005 SEQUOIA (RM1146U)
CUSTOMER PROBLEM ANALYSIS CHECK

DI57H±07
DI±1854
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
2048 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
REAR WIPER AND WASHER
SymptomSuspected AreaSee page
Rear wiper does not operate.
1. Wiper switch circuit
2. Rear wiper motor circuit
3. Rear wiper limit switch circuit
4. Back door power window pulse sensor circuit
5. Body ECU
6. Back door ECUDI±1704
DI±1880
DI±1885
DI±1877
IN±35
IN±35
Rear washer does not operate.1. Washer switch and washer motor circuit
2. Body ECUDI±1704
IN±35
Wiper does not operate when washer switch is ON.1. Wiper switch and washer motor circuit
2. Body ECUDI±1704
IN±35
OTHERS
SymptomSuspected AreaSee page
Back door power window does not operate.
1. Back door power window switch circuit
2. Back door power window pulse sensor circuit
3. Back door power window motor circuit
4. Body ECU
5. Back door ECUDI±1718
DI±1877
DI±1874
IN±35
IN±35
Back door lock does not operate.
1. Back door key lock and unlock switch circuit
2. Back door lock motor circuit
3. Back door unlock detection switch circuit
4. Back door courtesy light switch circuit
5. Back door key lock and unlock switch circuit
6. Back door ECUDI±1882
DI±1872
DI±1869
DI±1864
DI±1882
IN±35
Luggage room light does not come on.
1. Luggage room light circuit
2. Back door courtesy light switch circuit
3. Body door ECUDI±1867
DI±1864
IN±35
Whole functions of the back door control system do not operate.1. Power source circuit
2. Back door ECUDI±1861
IN±35

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±1856
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
2050 Author: Date:
2005 SEQUOIA (RM1146U) BDUP e BDDN
(B10±13 e B10±25)
P e W
Back door pow-
er window motor
(UP)
Back door power window operating upward10 to 14 V
BDDN e BDUP
(B10±25 e B10±13)W e P
Back door pow-
er window motor
(DOWN)
Back door power window not operatingBelow 1.0 V
BDDN e BDUP
(B10±25 e B10±13)W e P
Back door pow-
er window motor
(DOWN)
Back door power window operating downward10 to 14 V
LSWB e LSWE
(B10±6 e B10±22)R±L e R±Y
Back door un-
lock detection
switchBack door unlock detection switch ON (Back door lock
unlocked)Below 1.0 V
LSWB e LSWE
(B10±6 e B10±22)R±L e R±Y
Back door un-
lock detection
switchBack door unlock detection switch OFF (Back door lock
locked)10 to 14 V
P e SGND
(B10±12 e B10±18)L±W e L±RRear wiper posi-
tion switchRear wiper arm not in store position10 to 14 V
P e SGND
(B10±12 e B10±18)L±W e L±RRear wiper posi-
tion switchRear wiper arm in store positionBelow 1.0 V
SGND e Body ground
(B10±18 e Body ground)L±R e Body
groundGroundAlwaysBelow 1.0 V
W e SGND
(B10±3 e B10±18)L±B e L±RRear wiper re-
verse switchRear wiper arm not in stopping and reversing positionBelow 1.0 V
W e SGND
(B10±3 e B10±18)L±B e L±RRear wiper re-
verse switchRear wiper arm between stopping and reversing position10 to 14 V
WIP± e SGND
(B10±1 e B10±18)L±O e L±RRear wiper mo-
torRear wiper motor not operatingBelow 1.0 V
WIP± e SGND
(B10±1 e B10±18)L±O e L±RRear wiper mo-
torRear wiper motor rotates reversely10 to 14 V
WIP+ e SGND
(B10±2 e B10±18)L±Y e L±RRear wiper mo-
torRear wiper motor not operatingBelow 1.0 V
WIP+ e SGND
(B10±2 e B10±18)L±Y e L±RRear wiper mo-
torRear wiper motor rotates10 to 14 V
GND e Body ground
(B11±3 e Body ground)W±B e Body
groundGroundAlwaysBelow 1.0 V
MPX1 e ±
(B11±2 e ± )LG±R e ±Multiplex com-
munication lineMultiplex communication circuit±
MPX2 e ±
(B11±1 e ± )B e ±Multiplex com-
munication lineMultiplex communication circuit±
ILE e GND
(B11±8 e B11±3)W e W±BIllumination sig-
nalRear room light switch OFFBelow 1.0 V
ILE e GND
(B11±8 e B11±3)W e W±BIllumination sig-
nalRear room light switch ON or DOOR10 to 14 V
ACT± e ACT+
(B10±14 e B10±15)L±R e L±BBack door lock
motorBack door lock motor not operatingBelow 1.0 V
ACT± e ACT+
(B10±14 e B10±15)L±R e L±BBack door lock
motorBack door lock motor rotates reversely10 to 14 V
ACT+ e ACT±
(B10±15 e B10±14)L±B e L±RBack door lock
motorBack door lock motor not operatingBelow 1.0 V
ACT+ e ACT±
(B10±15 e B10±14)L±B e L±RBack door lock
motorBack door lock motor rotates reversely10 to 14 V

I28583
GND
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
DI±1857
2051 Author: Date:
2005 SEQUOIA (RM1146U) DSV e DSG
(B10±11 e B10±23)
LG±B e W±R
Back door pow-
er window pulse
sensor
Ignition switch ON10 to 14 V
DS1 e GND
(B10±17 e B11±3)LG±R e W±B
Back door pow-
er window pulse
sensor
Back door power window operatingPulse generation
(See waveform 1)
DS2 e GND
(B10±16 e B11±3)P e W±B
Back door pow-
er window pulse
sensor
Back door power window operatingPulse generation
(See waveform 1)
DSG e Body ground
(B10±23 e Body ground)W±R e Body
groundBack door pow-
er window pulse
sensor ground
AlwaysBelow 1 V
Waveform 1
ItemCondition
Tool setting5 V/DIV, 10 ms/DIV
Vehicle conditionBack door power window operating

DID9I±01
DI±1858
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
2052 Author: Date:
2005 SEQUOIA (RM1146U)
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
According to the DATA LIST displayed by the hand±held tester, you can read the value of the switch, sensor,
actuator and so on without parts removal. Reading the DATA LIST as the first step of troubleshooting is one
of the methods to shorten labor time.
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON.
(c) According to the display on the tester, read the DATA LIST.
BACK±DOOR:
ItemMeasurement Item/
Display (Range)Normal ConditionDiagnostic Note
COURTSY SW
Back door courtesy
light SW signal/ON or
OFFON: Back door is open
OFF: Back door is closed±
LOCK POS SWLock position SW sig-
nal/ON or OFFON: Door lock is in unlock position
OFF: Door lock is in lock position±
WIPER TURN SW
Rear wiper reversing
position switch/ON or
OFFON: Rear wiper reverse position
OFF: Rear wiper non±reverse position±
WIPER RTRCT SWRear wiper position
switch/ON or OFFON: Rear wiper arm in store position
OFF: Rear wiper arm not in store position±
KEY SW (UNLOCK)Unlock SW linked with
the key/ON or OFFON: Back door lock is in unlock position
OFF: Back door lock is in lock position±
KEY SW (LOCK)Unlock SW linked with
the key/ON or OFFON: Back door lock is in lock position
OFF: Back door lock is in unlock position±
UP/DOOR KEY
Back door key lock
and unlock switch
linked window open
and close/AVAIL or
NOT AVL
AVAIL: Key±linked open and close SET
NOT AVL: Key±linked open and close UNSET*1
DOWN/DOOR KEY
Back door key lock
and unlock switch
linked window open
and close/AVAIL or
NOT AVL
AVAIL: Key±linked open and close SET
NOT AVL: Key±linked open and close UNSET*1
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±
GLASS POS±1/4
Back door power win-
dow glass position
(Fully closed ± 1/4
open): OK or CAU-
TIONOK: Power window is going UP by manual operation
CAUTION: CAUTION may be displayed even when no resis-
tance is applied in each position. In this case there is a for-
eign object stuck in that position.
±
GLASS POS±2/4
Back door power win-
dow glass position
(Fully closed ± 2/4
open): OK or CAU-
TIONOK: Power window is going UP by manual operation
CAUTION: CAUTION may be displayed even when no resis-
tance is applied in each position. In this case there is a for-
eign object stuck in that position.
±
GLASS POS±3/4
Back door power win-
dow glass position
(Fully closed ± 3/4
open): OK or CAU-
TIONOK: Power window is going UP by manual operation
CAUTION: CAUTION may be displayed even when no resis-
tance is applied in each position. In this case there is a for-
eign object stuck in that position.
±