2001 TOYOTA SEQUOIA mirror

DIDE4±01
DI±1508± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)
1702 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
HINT:

If the cause of the problem still cannot be determined after the corresponding inspection, proceed to
the next step shown in this table.

The system uses multiplex communication. Check for DTCs for the multiplex communication system
before performing the following inspection.
SymptomSuspected AreaSee Page
Power seat does not operate (manual or memorized positions).1. Power source circuit
2. Position control ECU & switch assyDI±1514
BO±112
One function of power seat does not operate (manual or memo-
rized positions).1. Power seat motor circuit
2. Position control ECU & switch assyDI±1525
BO±112
One or all manual seat functions do not operate (memorized
positions OK).Position control ECU & switch assyBO±112
Memory function does not operate.
1. Power source circuit
2. Power seat memory switch circuit
3. Park/neutral position switch circuit
4. Door courtesy switch circuit
5. Position control ECU & switch assyDI±1514
DI±1518
DI±1528
DI±1533
BO±112
All memory functions do not operate or operate a little then stop
(manual functions OK).1. Power source circuit
2. Position control ECU & switch assyDI±1514
BO±112
One memory function does not operate or operates a little then
stops (manual functions OK).1. Power seat motor circuit
2. Position control ECU & switch assyDI±1525
BO±112
Lumbar support does not operate.Lumbar support control switch circuitDI±1521
The power seat control system does not control the storing and
restoring of the power mirror position.
1. Multiplex communication system
2. Driving position memory switch
3. Outer mirror assy
4. Position control ECU & switch assyDI±1904
BE±115
BE±115
BO±112

DI±1512± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)
1706 Author: Date:
2005 SEQUOIA (RM1146U)MEM M2 SW
Driving position memorized with seat memory
switch M2/
MEM or NOT MEMMEM: Memorized
NOT MEM: Not memorized
SEAT MEM M1
Seat position memorized with seat memory
switch M1/
MEM or NOT MEMMEM: Memorized
NOT MEM: Not memorized
SEAT MEM M2
Seat position memorized with seat memory
switch M2/
MEM or NOT MEMMEM: Memorized
NOT MEM: Not memorized
D±MIRR MEM1
Driver side mirror position memorized with seat
memory switch M1/
MEM or NOT MEMMEM: Memorized
NOT MEM: Not memorized
D±MIRR MEM2
Driver side mirror position memorized with seat
memory switch M2/
MEM or NOT MEMMEM: Memorized
NOT MEM: Not memorized
P±MIRR MEM M1
Passenger side mirror position memorized with
seat memory switch M1/
MEM or NOT MEMMEM: Memorized
NOT MEM: Not memorized
P±MIRR MEM M2
Passenger side mirror position memorized with
seat memory switch M2/
MEM or NOT MEMMEM: Memorized
NOT MEM: Not memorized
SLIDE MEM POS 1
Seat sliding position memorized with seat
memory switch M1/
MIN: ±4096, MAX: 4096
Within range from ±4096 to 4096
RECLIN MEM POS 1
Seat back position memorized with seat memory
switch M1/
MIN: ±4096, MAX: 4096
Within range from ±4096 to 4096
F VTCL MEM POS 1
Front vertical position memorized with seat
memory switch M1/
MIN: ±4096, MAX: 4096
Within range from ±4096 to 4096
LIFTER MEM POS 1
Lifter position memorized with seat memory
switch M1/
MIN: ±4096, MAX: 4096
Within range from ±4096 to 4096
SLIDE MEM POS 2
Seat sliding position memorized with seat
memory switch M2/
MIN: ±4096, MAX: 4096
Within range from ±4096 to 4096
RECLIN MEM POS 2
Seatback position memorized with seat memory
switch M2/
MIN: ±4096, MAX: 4096
Within range from ±4096 to 4096
F VTCL MEM POS 2
Front vertical position memorized with seat
memory switch M2/
MIN: ±4096, MAX: 4096
Within range from ±4096 to 4096
LIFTER MEM POS 2
Lifter position memorized with seat memory
switch M2/
MIN: ±4096, MAX: 4096
Within range from ±4096 to 4096
D±MIRR MEM POS 1
Driver side mirror position memorized with seat
memory switch M1/
MIN: 0, MAX: 65535
Within range from 0 to 65535
P±MIRR MEM POS 1
Passenger side mirror position memorized with
seat memory switch. M1/
MIN: 0, MAX: 65535
Within range from 0 to 65535
D±MIRR MEM POS 2
Driver side mirror position memorized with seat
memory switch M2/
MIN: 0, MAX: 65535
Within range from 0 to 65535
P±MIRR MEM POS 2
Passenger side mirror position memorized with
seat memory switch M2/
MIN: 0, MAX: 65535
Within range from 0 to 65535

DIDE6±01
DI±1514± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)
1708 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT INSPECTION
ECU power source circuit
CIRCUIT DESCRIPTION
The position control ECU is contained in the switch assy.
During manual operation, only one switch signal is accepted. If signals are input from 2 or more switches
simultaneously, all of them are ignored. However, when signals are input from only the front vertical switch
and lifter switch simultaneously, the signal from the lifter switch is accepted.
During automatic operation, a manual switch input overrides any other operations, i.e. automatic operations
stop and the manual input operation is accepted. For example, if a manual switch input is activated, during
a seat store/restore operation, the previous operation will cease and manual operation will be performed.
After the manual operation is performed, the previous automatic operation will not resume. Power mirror
store/restore operation is unaffected by manual switch inputs.
The position control ECU & switch assy disallows the restore operation of the power seat when the system
detects that the voltage of terminal SYSB is less than 8 V for 0.3 seconds or is more than 10 V for 30 seconds.
This circuit is a power source circuit of the position control ECU & switch assy.
HINT:
Manual adjustment of the slide reclining lumbar can be performed even when the ECU is not functional if
current is allowed to flow into terminals +B and SYSB.
Lumbar operation can always be performed.

DID98±01
I28587
From Battery Driving Position Memory Switch BODY ECU
Courtesy SW (D)
MM
Remote Control Mirror Switch
RHOuter
Mirror LH
(Retract
Motor) M1
M2 MM
M1 DCTY
PCTY
RRCY
RLCY
HCTY
KSW
LSWR
LSWL
PKB
WIG
IG
ACC
BECU
S+B
BDRACT+
ACTD
ACT±M2
MIRB
MIRS
MIRFM+
MSW
EB
MF
E2MR
Door Lock Motor
Front
LHFront
RHRear
LHRear
RH
Courtesy SW (P)
Courtesy SW (RR)
Courtesy SW (RL)
Hood Courtesy SW
Key Unlock Warning SW
Door Unlock Detection
SW Rear RH
Door Unlock Detection
SW Rear LH
Parking Brake SW
Battery AM1ALTACC IG1 Ignition SwitchWSH
ECU±IG
RAD No. 2
ECU±B
DOOR No. 2SECURITY
HORN AM1
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1679
1873 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DIAGRAM

DI1OE±19
Inspector 's name:
Customer 's Name
Date VehicleVIN
Licence Plate No.
Production Data
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)
Key Unlock Warning System
Headlight and Taillight System (Light Auto Turn±off system, Daytime Running
Light System
Stop Light System
Automatic Light Control System
Illuminated Entry System
Foglight System
Wiper and Washer System
Power Window Control System
Power Door Lock Control System
Theft Deterrent System
Wireless Door Lock Control System
Others (Buzzer etc.)
Auto Lock/Unlock System BODY CONTROL SYSTEM Check Sheet
Remote Control Mirror System (w/ Driving Position Memory)
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1683
1877 Author: Date:
2005 SEQUOIA (RM1146U)
CUSTOMER PROBLEM ANALYSIS CHECK

± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1687
1881 Author: Date:
2005 SEQUOIA (RM1146U)
WIRELESS DOOR LOCK CONTROL
SymptomSuspected AreaSee page
All functions of wireless door lock control system do not operate.
1. Transmitter
2. Wireless door lock receiver circuit
3. Key unlock warning switch circuit
4. Body ECUBE±99
DI±1737
DI±1715
IN±35
Lock (or unlock) function does not operate.
1. Door unlock detection switch circuit (Driver's)
(Passenger's)
(Rear Door)
(Back Door)
2. Any door ECU
3. Body ECUDI±1791
DI±1829
DI±1723
DI±1869
IN±35
IN±35
Automatic lock function operates even if any door is opened within
30 seconds after all doors are unlocked by wireless door lock
control system.1. Door courtesy light switch circuit
2. Any door ECU
3. Body ECUDI±1728
IN±35
IN±35
Wireless door lock function operates, but the buzzer does not
sound.1. Wireless door lock buzzer circuit
2. Body ECUDI±1741
IN±35
Buzzer sounds, but wireless door lock function does not operate.Body ECUIN±35
REAR WIPER AND WASHER
SymptomSuspected AreaSee page
Rear wiper does not operate.1. Rear wiper switch and motor circuit
2. Body ECUDI±1704
IN±35
Rear washer does not operate.1. Rear washer switch and motor circuit
2. Body ECUDI±1704
IN±35
LIGHT CONTROL
SymptomSuspected AreaSee page
Automatic light control does not operate.
1. Automatic light control sensor circuit
2. Light control switch circuit
3. Body ECUDI±1753
DI±1750
IN±35
Auto turn±off does not operate.
1. Door courtesy light switch circuit (Driver side)
2. Ignition switch
3. Driver door ECU
4. Body ECUDI±1728
BE±24
IN±35
IN±35
Daytime running light function does not operate.
1. Daytime running light relay circuit
2. Parking brake switch circuit
3. Body ECUDI±1712
DI±1744
IN±35
FOG LIGHT
SymptomSuspected AreaSee page
Fog lights do not come on.
1. Bulb
2. FOG fuse
3. Fog light relay and switch circuit
4. Body ECU±
BE±14
DI±1710
IN±35
OTHERS
SymptomSuspected AreaSee page
Illuminated entry function does not operate.1. Illumination circuit
2. Body ECUDI±1759
IN±35
All functions of the body control system do not operate.1. Power source circuit
2. Body ECUDI±1700
IN±35
Remote control mirror does not operate.
(w/ Driving position memory)1. Remote control mirror switch circuit
2. Driving position memory switch circuit
3. Body ECUDI±1767
DI±1772
IN±35

DI±1692
± DIAGNOSTICSBODY CONTROL SYSTEM
1886 Author: Date:
2005 SEQUOIA (RM1146U) FFOG ± GND1
(B6±13 ± B6±6)
G±B ± W±BFog light switch signalHeadlight dimmer switch LOW,
Fog light switch ON10 to 14 V
DIM (*1) ± GND1
(B7±17 ± B6±6)R ± W±BDIMMER relay signalIgnition switch OFFBelow 1 V
DIM (*1) ± GND1
(B7±17 ± B6±6)R ± W±BDIMMER relay signalIgnition switch ON10 to 14 V
H±ON (*1) ± GND1
(B7±16 ± B6±6)R±W ± W±BDRL No.4 relay signalIgnition switch OFFBelow 1 V
H±ON (*1) ± GND1
(B7±16 ± B6±6)R±W ± W±BDRL No.4 relay signalIgnition switch ON10 to 14 V
HIND (*1) ± GND1
(B5±18 ± B6±6)GR±L ± W±BHi±beam indicator light
signalIgnition switch OFFBelow 1 V
HIND (*1) ± GND1
(B5±18 ± B6±6)GR±L ± W±BHi±beam indicator light
signalIgnition switch ON10 to 14 V
A (*3) ± GND1
(B6±10 ± B6±6)L±R ± W±BLight control switch
(AUTO)Light control switch OFFBelow 1 V
A (*3) ± GND1
(B6±10 ± B6±6)L±R ± W±BLight control switch
(AUTO)Light control switch AUTO10 to 14 V
MIRE ± GND1
(B5±28 ± B6±6)LG±B ± W±BRemote control mirror
switch (Ground)AlwaysBelow 1 V
MIRS ± GND1
(B5±29 ± B6±6)P±L ± W±BRemote control mirror
switch (IG)Ignition switch ON10 to 14 V
MIRS ± GND1
(B5±29 ± B6±6)P±L ± W±BRemote control mirror
switch (IG)Ignition switch ON,
Mirror switch L or R position se-
lected
Below 1 V
MIRB ± GND1
(B5±30 ± B6±6)G±B ± W±BRemote control mirror
switch (Battery)Always10 to 14 V
S+B ± GND1
(B6±1 ± B6±6)W±L ± W±BBatteryAlways10 to 14 V
PWS ± GND1
(B6±21 ± B6±6)R±L ± W±BBack door power win-
dow switch (Ground)Ignition switch ONBelow 1 V
PWS ± GND1
(B6±21 ± B6±6)R±L ± W±BBack door power win-
dow switch (Ground)Ignition switch ON,
Back door power window switch
operated
10 to 14 V
M2 (*4) ± GND1
(B6±22 ± B6±6)G ± W±BDriving position
memory switch (M2)Ignition switch ON10 to 14 V
M2 (*4) ± GND1
(B6±22 ± B6±6)G ± W±BDriving position
memory switch (M2)Ignition switch ON,
Driving position memory switch
M2 button pushed
Below 1 V
M1 (*4) ± GND1
(B6±23 ± B6±6)L±Y ± W±BDriving position
memory switch (M1)Ignition switch ON10 to 14 V
M1 (*4) ± GND1
(B6±23 ± B6±6)L±Y ± W±BDriving position
memory switch (M1)Ignition switch ON,
Driving position memory switch
M1 button pushed
Below 1 V
MM (*4) ± GND1
(B6±24 ± B6±6)L ± W±BDriving position
memory switch (SET)Ignition switch ON10 to 14 V
MM (*4) ± GND1
(B6±24 ± B6±6)L ± W±BDriving position
memory switch (SET)Ignition switch ON,
Driving position memory switch
SET button pushed
Below 1 V

DID99±01
DI±1694
± DIAGNOSTICSBODY CONTROL SYSTEM
1888 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 values of the switches,
sensors, actuators and so on without parts removal. Reading the DATA LIST as a 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 ºDATA LISTº.
BODY ECU:
ItemMeasurement Item/Display
(Range)Normal ConditionDiagnostic Note
KEY UNLK WRN SWKey unlock warning switch/ON or
OFFON: Key is in ignition key cylinder
OFF: No key is in ignition key cyl-
inder
±
ACC SWACC switch/ON or OFFON: Ignition switch ACC
OFF: Ignition switch OFF±
IG SWIG switch/ON or OFFON: Ignition switch ON
OFF: Ignition switch OFF±
PARKING BRAKE SWParking brake switch/ON or OFF
ON:
Parking brake pedal depressed
(ON)
OFF:
Parking brake released (OFF)
±
HOOD COURTSY SWHood courtesy switch/ON or OFF
ON: Engine hood OPEN
(Hood courtesy switch ON)
OFF: Engine hood CLOSED
(Hood courtesy switch OFF)
±
D DOR CTY SWDriver door courtesy light switch/
ON or OFFON: Driver door is opened
OFF: Driver door is closed±
P DOR CTY SWFront passenger door courtesy
light switch/ON or OFF
ON: Front passenger door is
opened
OFF: Front passenger door is
closed
±
Rr DOR CTY SWRear passenger door courtesy
light switch/ON or OFF
ON: Rear passenger door is
opened
OFF: Rear passenger door is
closed
±
MIRR SEL SW RRemote control mirror switch pas-
senger side/ON or OFF
ON: Remote control mirror switch
passenger side is selected
OFF: Remote control mirror switch
passenger side is not selected
±
MIRR SEL SW LRemote control mirror switch driv-
er side/ON or OFF
ON: Remote control mirror switch
driver side is selected
OFF: Remote control mirror switch
driver side is not selected
±
MIRR POS SW RRemote control mirror switch R
position/ON or OFF
ON: Remote control mirror switch
R position is selected
OFF: Remote control mirror switch
R position is not selected
±