2001 TOYOTA SEQUOIA DLC3 Ts

H23996
LA
A2014
ABR I18
Ignition SW
Combination Meter
BatteryIG2 A2021
E1 A2025
E2 A2026 B
W±B
W±B B±R
IG2 AM26 5 W±R
SRS B±Y
C5 29
C612 C6241D4
1A5 1A3
IGN1
1D6
1F9
101A6
1A8 Instrument Panel J/B
Engine Room J/B1H11
1J7
2C1
2D1AM2BR
W±B
W±B
J8
J/C A
A 4
5 B
BB±O
IEAirbag Sensor
Assembly
1C2
Instrument Panel J/B
F10
Fusible Link Block 1C3 D6
DLC3
114B10
4A20
4A10B±Y
B±Y
1F W±R Sub J/B No. 4 DI±1492
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1686 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

DI±1496
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1690 Author: Date:
2005 SEQUOIA (RM1146U)
SRS Warning Light Circuit Malfunction (Does not light up, when
ignition switch is turned to on)
CIRCUIT DESCRIPTION
The SRS warning light is located on the combination meter assembly.
When the SRS is normal, the SRS warning light comes on for approximately 6 seconds after the ignition
switch is turned from the LOCK position to the ON position, and then goes off automatically.
If there is a malfunction in the SRS, the SRS warning light comes on to inform the driver of a problem.
When terminals TC and CG of the DLC3 are connected, the DTC is displayed by blinking the SRS warning
light.
WIRING DIAGRAM
See page DI±1491.
INSPECTION PROCEDURE
CAUTION:
Be sure to perform the following procedures before troubleshooting to avoid unexpected airbag de-
ployment.
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (±) terminal cable from the battery, and wait for at least 90 seconds.
(c) Disconnect the connectors from the airbag sensor assembly.
(d) Disconnect the connectors from the steering wheel pad.
(e) Disconnect the connectors from the front passenger airbag assembly.
(f) w/ Side and curtain shield airbag:
Disconnect the connectors from the side airbag assembly LH and RH.
(g) w/ Side and curtain shield airbag:
Disconnect the connectors from the curtain shield airbag assembly LH and RH.
(h) Disconnect the connectors from the front seat outer belt LH and RH.
1 Check battery.
CHECK:
Measure the voltage of the battery.
OK:
Voltage: 11 to 14 V
NG Replace battery.
OK
DIDHV±01

H24006
Airbag Sensor
Assembly
TC 15
P±B
A20 G Instrument Panel J/B Sub J/B No. 4
D6
DLC3 5
4D 5
4E
5
4B
5
4C5
4A P±B
P±B
P±B P±B 23
E4 ECM
TC
T5
Translate ECU
T17
Tire Pressure Monitor ECUTC
TC28
12 13TC
CG
4O
A
J43
J/C
IGA
O 9
1A 15
1F DI±1498
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1692 Author: Date:
2005 SEQUOIA (RM1146U)
TC Terminal Circuit
CIRCUIT DESCRIPTION
DTC output mode is set by connecting terminals TC and CG of the DLC3.
The DTCs are displayed by blinking of the SRS warning light.
WIRING DIAGRAM
HINT:
When each warning light stays blinking, a ground short in the wiring of the terminal TC of the DLC3 or an
internal ground short in each ECU is suspected.
DIDHW±01

H40173G27651H23482
DLC3:
TC
Airbag Sensor Assembly:
A20
TC
D6
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1499
1693 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
CAUTION:
Be sure to perform the following procedures before troubleshooting to avoid unexpected airbag de-
ployment.
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (±) terminal cable from the battery, and wait for at least 90 seconds.
(c) Disconnect the connectors from the airbag sensor assembly.
(d) Disconnect the connectors from the steering wheel pad.
(e) Disconnect the connectors from the front passenger airbag assembly.
(f) w/ Side and curtain shield airbag:
Disconnect the connectors from the side airbag assembly LH and RH.
(g) w/ Side and curtain shield airbag:
Disconnect the connectors from the curtain shield airbag assembly LH and RH.
(h) Disconnect the connectors from the front seat outer belt LH and RH.
1 Check wire harness (DLC3 ± airbag sensor assembly).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
D6±13 (TC) ±
A20±15 (TC)AlwaysBelow 1 W
NG Repair or replace wire harness (TC of DLC3 ± TC
of airbag sensor assembly).
OK

H23483CG
DLC3:
D6
H23040TC
A20
DI±1500
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1694 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check wire harness (CG of DLC3 ± body ground).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
D6±4 (CG) ± Body groundAlwaysBelow 1 W
NG Repair or replace wire harness (CG of DLC3 to
body ground).
OK
3 Check wire harness (TC of airbag sensor assembly ± body ground).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
A20±15 (TC) ±
Body groundAlways1 MW or higher
NG Repair or replace wire harness or each ECU.
OK
Replace airbag sensor assembly (see page RS±82).

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

± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI±1513
1707 Author: Date:
2005 SEQUOIA (RM1146U)
2. ACTIVE TEST
HINT:
Performing the ACTIVE TEST using the hand±held tester allows you to operate the seat motors without parts
removal. Performing the ACTIVE TEST 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) Perform the ACTIVE TEST according to the display on the tester.
D±SEAT:
ItemTest DetailsDiagnostic Note
RECLINING
Test Detail:
Reclining operation FRONT/REAR/OFF
Vehicle Condition:
Vehicle is stopped
±
F VERTICAL
Test Detail:
Front vertical operation UP/DOWN/OFF
Vehicle Condition:
Vehicle is stopped
±
LIFTER
Test Detail:
Lifter operation UP/DOWN/OFF
Vehicle Condition:
Vehicle is stopped
±
SLIDE
Test Detail:
Lifter operation UP/DOWN/OFF
Vehicle Condition:
Vehicle is stopped
±

DI3CH±22
I28458
E8E7 E6 E5 E4
DI±1542
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1736 Author: Date:
2005 SEQUOIA (RM1146U)
TERMINALS OF ECM
Symbols (Terminals No.)Wiring ColorTerminal DescriptionConditionSpecified Condition
TC (E4±23) ± E1 (E6±1)P±B ± BRDTC output signalIgnition switch on10 to 14 V
TC (E4±23) ± E1 (E6±1)P±B ± BRDTC output signalIgnition switch on, connect terminals
TC and CG of DLC3Below 1 V
ST1± (E4±16) ± E1 (E6±1)L±B ± BRCruise cancel input signalIgnition switch on, depress brake
pedalBelow 1 V
ST1± (E4±16) ± E1 (E6±1)L±B ± BRCruise cancel input signalIgnition switch on, release brake
pedal10 to 14 V
STP (E4±15) ± E1 (E6±1)G±Y ± BRStop light switch input sig-
nalIgnition switch on, depress brake
pedal10 to 14 V
STP (E4±15) ± E1 (E6±1)G±Y ± BRStop light switch input sig-
nalIgnition switch on, release brake
pedalBelow 1 V
CCS (E5±2) ± E1 (E6±1)R±Y ± BRCruise control main
switch input circuitIgnition switch on10 to 14 V
CCS (E5±2) ± E1 (E6±1)R±Y ± BRCruise control main
switch input circuitIgnition switch on, CANCEL switch
held ON6.6 to 10.1 V
CCS (E5±2) ± E1 (E6±1)R±Y ± BRCruise control main
switch input circuitIgnition switch on, +/RES switch
held ON4.5 to 7.1 V
CCS (E5±2) ± E1 (E6±1)R±Y ± BRCruise control main
switch input circuitIgnition switch on, ±/SET switch
held ON2.3 to 4.0 V
CCS (E5±2) ± E1 (E6±1)R±Y ± BRCruise control main
switch input circuitIgnition switch on, MAIN switch held
ONBelow 1 V
SPD (E5±8) ±E1 (E6±1)G±O ± BRSpeed signalIgnition switch on, rotate driving
wheel slowlyPulse generation
(see page DI±278)
D (E5±21) ±E1 (E6±1)W±R ± BRD shift position switch in-
put signalIgnition switch on, shift lever D posi-
tion10 to 14 V
D (E5±21) ±E1 (E6±1)W±R ± BRD shift position switch in-
put signalIgnition switch on, shift lever any
position except DBelow 1 V
PI (E5±18) ±E1 (E6±1)LG±R ± BRCruise indication signalIgnition switch on, MAIN switch
OFF10 to 14 V
PI (E5±18) ±E1 (E6±1)LG±R ± BRCruise indication signalIgnition switch on, MAIN switch onBelow 1 V