2001 TOYOTA SEQUOIA wheel

± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1471
1665 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 DTC.
CHECK:
(a) Proceed to each step according to how to read DTC.
(1) If using the hand±held tester (read the 5±digit of DTC):
Using the hand±held tester, check the DTCs (see page DI±1147).
RESULT:
DTC B1905 is output.A
DTC B1906 is output.B
DTC B1907 is output.C
DTC B1908 is output.D
(2) If not using the hand±held tester (read the 2±digit of DTC):
Check the DTCs (see page DI±1147).
RESULT:
DTC 74 is output.E
HINT:
Codes other than DTC B1905, B1906, B1907, B1908 and DTC 74 may be output at this time, but they are
not related to this check.
B Go to step 4.
C Go to step 5.
D Go to step 6.
E Go to step 7.
A

H23040
IG2
A20
DI±1482
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1676 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 battery.
CHECK:
Measure the voltage of the battery.
OK:
Voltage: 11 to 14 V
NG Replace battery.
OK
2 Check source voltage (power source).
PREPARATION:
Connect the negative (±) terminal cable to the battery, and wait
for at least 2 seconds.
CHECK:
(a) Turn the ignition switch to the ON position.
(b) Measure the voltage according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
A20±21 (IG2) ±
Body groundIgnition switch ON10 to 14 V
NG Repair or replace wire harness (battery ± airbag
sensor assembly).
OK

DI±1484
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1678 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check SRS warning light.
PREPARATION:
(a) Connect the connectors to the airbag sensor assembly.
(b) Connect the connectors to the steering wheel pad.
(c) Connect the connectors to the front passenger airbag assembly.
(d) w/ Side and curtain shield airbag:
Connect the connectors to the side airbag assembly LH and RH.
(e) w/ Side and curtain shield airbag:
Connect the connectors to the curtain shield airbag assembly LH and RH.
(f) Connect the connectors to the front seat outer belt LH and RH.
(g) Connect the negative (±) terminal cable to the battery, and wait for at least 2 seconds.
CHECK:
(a) Turn the ignition switch to the ON position, and wait for at least 6 seconds.
(b) Operate all components of the electrical system (defogger, wiper, headlight, heater blower, etc.) and
check the SRS warning light operation.
OK:
The SRS warning light does not come on.
NG Replace airbag sensor assembly
(see page RS±82).
OK
END

± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1493
1687 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check battery.
CHECK:
Measure the voltage of the battery.
OK:
Voltage: 11 to 14 V
NG Replace battery.
OK
2 Check connection of connectors.
PREPARATION:
Disconnect the negative (±) terminal cable from the battery, and wait for at least 90 seconds.
CHECK:
Check that the connectors are properly connected to the airbag sensor assembly and combination meter.
OK:
The connectors are connected securely.
NG Connect connectors.
OK
3 Prepare for inspection.
CAUTION:
Be sure to perform the following procedures before troubleshooting to avoid unexpected airbag de-
ployment.
(a) Disconnect the connectors from the airbag sensor assembly.
(b) Disconnect the connectors from the steering wheel pad.
(c) Disconnect the connectors from the front passenger airbag assembly.
(d) w/ Side and curtain shield airbag:
Disconnect the connectors from the side airbag assembly LH and RH.
(e) w/ Side and curtain shield airbag:
Disconnect the connectors from the curtain shield airbag assembly LH and RH.
(f) Disconnect the connectors from the front seat outer belt LH and RH.
NEXT

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

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

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

I28553
+/RES
CANCEL±/SETON±
OFF
312
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±1563
1757 Author: Date:
2005 SEQUOIA (RM1146U)
Proceed to next circuit inspection shown in
problem symptoms table
(See page DI±1541).
2 Check cruise control switch continuity.
PREPARATION:
(a) Remove the steering wheel center pad.
(b) Disconnect the cruise control switch connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Switch conditionTester connectionSpecified condition
Neutral1 ± 3Below 1 W
RES/+1 ± 3210 to 270 W
SET/±1 ± 3560 to 700 W
CANCEL1 ± 31,380 to 1,700 W
Main Switch OFF1 ± 310 kW or higher
Main Switch ON1 ± 3Below 1 W
NG Replace cruise control switch.
OK