2001 TOYOTA SEQUOIA door lock

DIDDZ±01
I28552
Position Control ECU
& Switch Assy
Park/Neutral
Position Switch
Combination
MeterPower Seat Motor
Driver Side (Reclining)
Power Seat Motor
Driver Side (Slide) Power Seat Motor
Driver Side (Front Vertical) Power Seat Motor
Driver Side (Lifter)
Front Door Courtesy
Light Switch Assy Seat Memory Switch Lumbar
Support
Control
MotorLumbar Support
Control Switch To Battery
To Battery To Ignition SwitchECU±B
PWR SEATECU±IGSYSB
IG
+BRCL+
RCL±
LFT+
LFT±
FRV+
FRV±
SLD+
SLD±
SW1
SW2
MMRYDCTY
Key Unlock
Warning Switch
KSW
Body ECU
BEANTo Ignition Switch
± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI±1503
1697 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DIAGRAM

DIDGG±01
± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI±1511
1705 Author: Date:
2005 SEQUOIA (RM1146U)
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
Using the DATA LIST displayed on the hand±held tester, you can read the value of the switch, sensor, etc.
without parts removal. Reading the DATA LIST as the first step of troubleshooting is one way to shorten the
labor time.
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON.
(c) Read the DATA LIST according to the display on the tester.
D±SEAT:
ItemMeasurement Item/
Display (Range)Normal Condition
RECLIN SW REARReclining switch signal (Rearward)/
ON or OFFON: Reclining switch (Rearward) is ON
OFF: Reclining switch (Rearward) is OFF
RECLIN SW FRONTReclining switch signal (Forward)/
ON or OFFON: Reclining switch (Forward) is ON
OFF: Reclining switch (Forward) is OFF
F VTCL SW DOWNFront vertical switch signal (Downward)/
ON or OFFON: Front vertical switch (Downward) is ON
OFF: Front vertical switch (Downward) is OFF
F VTCL SW UPFront vertical switch signal (Upward)/
ON or OFFON: Front vertical switch (Upward) is ON
OFF: Front vertical switch (Upward) is OFF
LIFTER SW DOWNLifter switch signal (Downward)/
ON or OFFON: Lifter switch (Downward) is ON
OFF: Lifter switch (Downward) is OFF
LIFTER SW UPLifter switch signal (Upward)/
ON or OFFON: Lifter switch (Upward) is ON
OFF: Lifter switch (Upward) is OFF
SLIDE SW REARSliding switch signal (Rearward)/
ON or OFFON: Sliding switch (Rearward) is ON
OFF: Sliding switch (Rearward) is OFF
SLIDE SW FRONTSliding switch signal (Forward)/
ON or OFFON: Sliding switch (Forward) is ON
OFF: Sliding switch (Forward) is OFF
POWER VOLTAGEPower supply for position control ECU & switch/
MIN: 0 V, MAX: 19.89 VWithin range from 11 V to 14 V
IG SWIgnition switch status/
ON or OFFON Ignition switch is ON
OFF: Ignition switch is OFF
KEY UNLOCK SWKey unlock warning switch signal/
ON or OFFON: Key is in ignition key cylinder
OFF: Key is not in ignition key cylinder
D±DOOR WARN SWDoor courtesy switch signal/
ON or OFFON: Driver side door is open
OFF: Driver side door is closed
PNP SWPark/neutral position switch signal/
ON or OFFON: Shift lever in neutral position
OFF: Shift lever in any position except neutral
M2 SWSeat memory switch M2 signal/
ON or OFFON: Seat memory switch M2 is ON
OFF: Seat memory switch M2 is OFF
M1 SWSeat memory switch M1 signal/
ON or OFFON: Seat memory switch M1 is ON
OFF: Seat memory switch M1 is OFF
SET SWSeat memory set switch signal/
ON or OFFON: Memory set switch is ON
OFF: Memory set switch is OFF
SLIDE POSSeat sliding position/
MIN: ±4096, MAX: 4096Within range from ±4096 to 4096
RECLN POSSeatback position/
MIN: ±4096, MAX: 4096Within range from ±4096 to 4096
F VTCL POSSeat front vertical position/
MIN: ±4096 MAX: 4096Within range from ±4096 to 4096
LIFTER POSSeat lifter position/
MIN: ±4096 MAX: 4096Within range from ±4096 to 4096
MEM M1 SW
Driving position memorized with seat memory
switch M1/
MEM or NOT MEMMEM: Memorized
NOT MEM: Not memorized

DI1AP±40
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI±1573
1767 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
SymptomSuspected AreaSee page
Immobiliser is not set.
(Engine starts with key codes other than the registered key code.)1. Door courtesy light switch circuit (DTC12)
2. Transponder key ECUDI±1585
IN±35
Engine does not start.
1. Key
2. Key unlock warning switch circuit (DTC11)
3. Transponder key coil
4. Transponder key ECU
5. ECM*1
DI±1582
BE±143
IN±35
IN±35
Security indicator is always ON.
1. Security indicator
2. Security indicator light circuit
3. Transponder key ECU*2
DI±1597
IN±35
Security indicator is always ON.
(Although code has been registered in the automatic registration
mode, indicator is not OFF.)1. Transponder key coil
2. Transponder key ECUBE±143
IN±35
Security indicator is OFF.
(When DTC of immobiliser is output)1. Transponder key coil
2. Transponder key ECUBE±143
IN±35
Security indicator is OFF.
(When DTC of immobiliser is not output)1. Security indicator light circuit
2. Diagnosis circuit
3. Transponder key ECUDI±1597
DI±1599
IN±35
Security indicator is abnormally blinking.Transponder key ECUIN±35
No code is output.
1. Power source circuit
2. Diagnosis circuit
3. Transponder key ECUDI±1595
DI±1599
IN±35
*1 : Check that the key which did not start the engine has been registered, and that it is possible to start with
any other already registered key.
*2 : Finish the automatic registration mode because the mode might still be set.

DIABB±02
I24389
T16 Transponder Key ECU: DI±1574
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
1768 Author: Date:
2005 SEQUOIA (RM1146U)
TERMINALS OF ECU
Symbols (Terminals No.)Wiring ColorConditionSpecified condition
+B e GND
(T16 ± 1 e T16 ± 14)W±R e OAlways10 to 14 V
IG e GND
(T16 ± 2 e T16 ± 14)B±O e OIgnition switch ON10 to 14 V
D e GNDWLOIgnition switch ON " 10 to 14 V " D e GND
(T16 ± 3 e T16 ± 14)W±L e OIgnition switch ON "
Connect terminals OP3 and CG of DLC310 to 14 V "
Below 2 V
CODE e GND
(T16 ± 4 e T16 ± 14)R±Y e OIgnition switch ON10 to 14 V
RXCK e GND
(T16 ± 5 e T16 ± 14)LG e OIgnition switch ON10 to 14 V
VC12 e AGND
(T16 ± 6 e T16 ± 12)GR±B e GR±LAlways10 to 14 V
IND e GNDLG BO
Security indicator light is on. (It flashes when the immobiliser
ti ti)3 to 6 V " IND e GND
(T16 ± 7 e T16 ± 14)LG±B e Osystem is operating.) "
Security indicator light is off.3 to 6 V "
Below 1 V
CTY e GNDGR LODriver's door closed " 10 to 14 V " CTY e GND
(T16 ± 8 e T16 ± 14)GR±L e ODriver s door closed "
Driver's door open10 to 14 V "
Below 1 V
KSW e GNDYGOKey unlock warning switch ON (Key inserted) " Below 1 V " KSW e GND
(T16 ± 9 e T16 ± 14)Y±G e OKey unlock warning switch ON (Key inserted) "
Key unlock warning switch OFF (Key not inserted)Below 1 V "
10 to 14 V
EFII e GND
(T16 ±10 e T16 ± 14)L±Y e OIgnition switch ON10 to 14 V
EFIO e GND
(T16 ±11 e T16 ± 14)P±G e OIgnition switch ON10 to 14 V
AGND e Body ground
(T16 ±12 e Body
ground)
GR±L e Body groundAlwaysBelow 1 V
TXCT e GND
(T16 ± 13 e T16 ± 14)Y±G e OIgnition switch ON10 to 14 V
GND e Body ground
(T16 ±14 e Body
ground)
O e Body groundAlwaysBelow 1 V

DI1AM±35
DI±1578
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
1772 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSTIC TROUBLE CODE CHART
ECM DIAGNOSTIC TROUBLE CODE CHART (MIL)
DTC No.
(See page)Detection ItemTrouble Area
99
(DI±1580)Engine immobiliser system malfunction

Transponder key ECU

ECM

Wire harness
TRANSPONDER KEY ECU DIAGNOSTIC TROUBLE CODE CHART (SECURITY INDICATOR LIGHT)
DTC No.
(See page)Detection ItemTrouble Area
11
(DI±1582)Code 11 is not output

Unlock warning switch

Transponder key ECU

Wire harness
12
(DI±1585)Code 12 is not output

Driver door courtesy lamp switch

Transponder key ECU

Body ECU

Wire harness
13
(DI±1587)Code 13 is not output

Ignition switch

Transponder key ECU

Wire harness
21, 22
(DI±1589)Code 21 or 22 is not output

Key

Transponder key ECU

Transponder key amplifier with key coil

Wire harness
31, 35, 36, 37
(DI±1592)Code 31, 35, 36 or 37 is outputKey
32, 33
(DI±1593)Code 32 or 33 is output

Key

Transponder key ECU

Wire harness
34Code 34 is outputTransponder key ECU has no memory space to register anoth-
er key code
HINT:

DTCs 11, 12, 13, 21 and 22 are normal codes.

As for the normal codes, if the corresponding DTC is not output while operating any of the components
listed under ºTrouble Areaº, perform the inspection described in the reference pages.

DTCs 31, 32, 33, 34, 35, 36, 37 and 99 are abnormal codes.

DID8P±01
I28566
Seat Position
Control ECU
A/C ECU (Integration
Control Panel) BEANBody ECU
Back Door ECU
ECM
Light Control
Rheostat
Vehicle Speed
Sensor
Oil Pressure
Sender Gauge
Fuel Sender Gauge
Seat Inner
Belt Switch
Park/neutral
Position Switch
Turn Signal
Flasher Relay
Washer Level SensorKey Unlock
Warning Switch
Door Courtesy
Lamp Switch
Parking Brake Switch
Transponder
Key ECU
4WD Control ECU
Airbag Sensor
Center ECU Combination
Meter
Skid Control ECU
Suspension
Control ECU
Translate ECU
Overhead Module
(Garage Door
Opener)BEAN
BEAN
BEAN
BEAN
BEAN BEAN
± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1605
1799 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DIAGRAM

DI±1606
± DIAGNOSTICSCOMBINATION METER SYSTEM
1800 Author: Date:
2005 SEQUOIA (RM1146U)
Input and output signals of each ECU
Transmitting ECU
(transmitter)Receiving ECUSignalsCommunication
method
A/C ECU

Combination meter

Driver door control ECU

Passenger door control ECU
Temperature dataBEAN
A/C ECUCombination meterEngine coolant temperature dataBEAN
Combination meter

A/C ECU

Body ECU

Driver door control ECU

Passenger door control ECU

Back door ECU
Vehicle speed signalBEAN
Combination meter
Body ECU

Seat control ECUShift position signalBEAN
Combination meter

A/C ECU

Body ECU

Driver door control ECU

Passenger door control ECU

Back door ECU
Meter activation signalBEAN
Combination meterA/C ECUDisplay unit demand signalBEAN
Combination meterBody ECUEngine system signalBEAN
Body ECU

A/C ECU

Combination meter

Driver door control ECU

Passenger door control ECU

Seat control ECU

Sliding roof control ECU

Back door ECU
Diagnosis tool demand signalBEAN
Body ECU
A/C ECU

Combination meterBody control system signal (HEAD
signal, TAIL signal)BEAN
Body ECU

Combination meter

Driver door control ECU

Passenger door control ECU

Seat control ECU

Sliding roof control ECU

Back door ECU
Body control system signal (IG
signal, ACC signal, All door cour-
tesy lamp signal, Door lock signal,
Door unlock signal)
BEAN
Body ECU

Combination meter

Driver door control ECU

Passenger door control ECU

Seat control ECU

Sliding roof control ECU

Back door ECU
Body ECU activation signalBEAN
Body ECU

Combination meter

Driver door control ECU

Seat control ECUBody control system signal (KSW
signal)BEAN
Body ECU

Combination meter

Driver door control ECU

Passenger door control ECU

Seat control ECUDoor condition signal (Driver side
door courtesy lamp signal, Pas-
senger side door courtesy signal)
BEAN

DID8Q±01
DI±1608
± DIAGNOSTICSCOMBINATION METER SYSTEM
1802 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DESCRIPTION
1. METER GAUGE AND WARNING/INDICATOR
GAUGE:
ItemDetail
SpeedometerVehicle speed sensor (Direct line).
TachometerECM transmits engine speed to the meter to display.
ODO/TRIP MeterCombination meter assy.
FuelDisplays a fuel level according to a signal from the fuel sender gauge (Direct line).
Water TemperatureDisplays engine coolant temperature according to a signal from the ECM (BEAN).
Oil PressureReceives a signal from the oil pressure sender (Direct line).
Volt MeterDisplays vehicle voltage according to a voltage from the IG terminal (Direct line).
WARNING/INDICATOR:
HINT:
Combination meter bulb check is performed for 3 seconds after the ignition switch is turned ON.
ItemDetailList of indicators available for
bulb check
O/D OFFReceives a signal from the ECM (Direct line)±
TURNTurns signal switch ON (Direct line)±
BEAMReceives a signal from the body ECU (*1), Displays a signal received from the
dimmer switch (*2) (Direct line)±
SECURITYReceives a set signal from the transponder key ECU and body ECU (Direct line)±
CHARGEReceives a malfunction signal from the alternator (Direct line)
AIR BAGReceives a malfunction signal from the airbag sensor center (Direct line)
D SEAT BELTReceives the driver seat belt signal (Unfastened) from the seat belt inner front LH
(Direct line)±
DOOROpen door indicator comes on when a signal is received from the ECU (BEAN)
from each door±
A/T OIL TEMP.Warning is displayed when the oil temperature is high (Direct line)
BRAKEComes on when the parking brake switch is on or the brake fluid level warning
switch is on (Direct line)
MIL (CHECK ENGINE)Receives a malfunction signal from the ECM (Direct line)
FUEL WARNINGReceives the fuel empty signal from the fuel sender gauge (Direct line)±
ABSReceives a malfunction signal from the skid control ECU (Direct line)
WASHERWarning is displayed when the washer level is low (Direct line)±
CRUISEReceives a CRUISE on signal or malfunction signal from the ECM (Direct line)±
VSC TRACReceives a malfunction signal from the skid control ECU (Direct line)
VSC (TRAC) OFFReceives a malfunction signal from the translate ECU (Direct line)
SLIPReceives a malfunction signal from the translate ECU (Direct line)
4HIReceives a 4HI signal from the 4WD control ECU (Direct line)±
CTR DIF LOCKReceives a DIF LOCK signal from the 4WD control ECU (Direct line)±
A/T PReceives a P signal from the park/neutral position switch (Direct line)±
A/T NReceives an N signal from the park/neutral position switch (Direct line)±
A/T DReceives a D signal from the park/neutral position switch (Direct line)±
A/T 3Receives a 3 signal from the park/neutral position switch (Direct line)±
A/T 2Receives a 2 signal from the park/neutral position switch (Direct line)±
A/T LReceives an L signal from the park/neutral position switch (Direct line)±