2001 TOYOTA SEQUOIA airbag off

DI±1480
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1674 Author: Date:
2005 SEQUOIA (RM1146U)
DTC Normal Source Voltage Drop
CIRCUIT DESCRIPTION
The SRS is equipped with a voltage±increase circuit (DC±DC converter) in the airbag sensor assembly in
case the source voltage drops.
When the battery voltage drops, the voltage±increase circuit (DC±DC converter) functions to increase the
voltage of the SRS to normal voltage.
A malfunction in this circuit is displayed differently from other codes. The source voltage drop is indicated
when the SRS warning light comes on without showing any DTCs.
A malfunction in this circuit is not recorded in the airbag sensor assembly. The SRS warning light automati-
cally goes off when the source voltage returns to normal.
DTC No.Detection Item
(Normal)Source voltage drop
DIDHS±01

± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1485
1679 Author: Date:
2005 SEQUOIA (RM1146U)
Trouble in Indicator of Passenger Airbag ON/OFF Indicator
CIRCUIT DESCRIPTION
The occupant classification system detects the front passenger seat condition. It then informs a passenger
of the front passenger airbag assembly condition (activated/not activated) by the passenger airbag ON/OFF
indicator.
The table below shows the normal indication condition of the passenger airbag ON/OFF indicator and the
front passenger seat condition.
Front passenger seat conditionON IndicatorOFF Indicator
Adult is seated.ONOFF
Child is seated.OFFON
VacantOFFOFF
Occupant classification system failureOFFON
INSPECTION PROCEDURE
1 Check SRS warning light.
CHECK:
Turn the ignition switch to the ON position, and check the SRS warning light condition.
HINT:
If this trouble occurs, the SRS warning light is off. If it is on, a DTC is output. Troubleshoot for the output DTC.
OK:
The SRS warning light does not come on.
NG Check DTC (see page DI±1147).
OK
DIDHT±01

DI±1486
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1680 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check passenger airbag ON/OFF indicator condition.
PREPARATION:
Turn the ignition switch to the ON position.
CHECK:
Check if the passenger airbag ON/OFF indicator correctly indicates the front passenger seat condition.
OK:
Front passenger seat conditionON IndicatorOFF Indicator
Adult is seated.ONOFF
Child is seated.OFFON
VacantOFFOFF
Occupant classification system failureOFFON
NG Go to step 3.
OK
END

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

H23040
LA A20
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1497
1691 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check combination meter.
PREPARATION:
Connect the negative (±) terminal cable to the battery, and wait for at least 2 seconds.
CHECK:
Turn the ignition switch to the ON position, check the operation of the SRS warning light.
OK:
The SRS warning light comes on (goes off 6 seconds after the ignition switch is turned to the
ON position).
NG Go to step 3.
OK
Replace airbag sensor assembly (see page RS±82).
3 Check wire harness (combination meter ± airbag sensor assembly).
PREPARATION:
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (±) terminal cable from the bat-
tery, and wait for at least 90 seconds.
(c) Disconnect the connector from the combination meter.
(d) 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±14 (LA) ±
Body groundIgnition switch ONBelow 1 V
NG Repair or replace wire harness.
OK
Replace combination meter (see page BO±89).

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)±

± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1609
1803 Author: Date:
2005 SEQUOIA (RM1146U)A/T R
Receives an R signal from the park/neutral position switch (Direct line)±
TAIL/HEADReceives a dimmer signal from the body ECU (BEAN)±
TIRE PRESSUREReceives a low tire pressure signal from the tire pressure monitor ECU (Direct line)
4LOReceives a 4LO signal from the 4WD control ECU (Direct line)±
MAIN REQD (Blinks)Blinks when 4,500 miles have been traveled, after ODO/TRIP switch is set (Direct
line)
MAIN REQD (Comes on)Blinks when 5,000 miles have been traveled, after ODO/TRIP switch is set (Direct
line)
RSCA OFFReceives an RSCA OFF signal from the airbag sensor center (Direct line)
HIReceives a suspension position HI signal from the suspension control ECU (Direct
line)
NReceives a suspension position N signal from the suspension control ECU (Direct
line)
LOReceives a suspension position LO signal from the suspension control ECU (Direct
line)
AHC MAN.Receives a suspension control manual signal from the suspension control ECU
(Direct line)
*1: w/ Day time running light
*2: w/o Day time running light
BUZZER:
ItemDetail
Key ReminderBuzzer is ON: Ignition switch is OFF, key is inserted, and door is open.
Fasten BeltBuzzer is ON: Ignition switch is ON and seat belt is unfastened.
2. COMBINATION METER IN SEQUOIA HAS THE FOLLOWING FEATURES:
(a) Built±in buzzer for the reminder system (key and seat belt)
(b) Integrated trip and odometer knobs

Press and release knob to scroll through trip ºAº, trip ºBº, and odometer features.

Press and hold the trip knob to reset trip meter functions.
(c) Oil maintenance indicator

When 4,500 miles have been traveled, after the ODO/TRIP switch is set, the maintenance indica-
tor begins to blink for 15 seconds after the ignition switch is turned to the ON position.

When 5,000 miles have been traveled, after the ODO/TRIP switch is set, the maintenance indica-
tor comes on.

Press and hold the trip knob to reset the oil maintenance indicator.
(d) Rotate knob to adjust interior illumination

± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1691
1885 Author: Date:
2005 SEQUOIA (RM1146U) TAIL ± GND1
(B6±7 ± B6±6)
G ± W±BLight control switch
(TAIL)Light control switch OFF10 to 14 V
CLTS (*3) ± GND1
(B6±12 ± B6±6)Y ± W±BAutomatic light control
sensor (Signal)Ignition switch OFFBelow 1 V
CLTS (*3) ± GND1
(B6±12 ± B6±6)Y ± W±BAutomatic light control
sensor (Signal)Ignition switch ONSignal waveform
CLTE (*3) ± GND1
(B6±3 ± B6±6)BR ± W±BAutomatic light control
sensor (Ground)AlwaysBelow 1 V
CLTB (*3) ± GND1
(B6±4 ± B6±6)R±G ± W±BAutomatic light control
sensor (IG)Ignition switch OFFBelow 1 V
CLTB (*3) ± GND1
(B6±4 ± B6±6)R±G ± W±BAutomatic light control
sensor (IG)Ignition switch ON10 to 14 V
BZR ± GND1
(B7±15 ± B6±6)LG ± W±BWireless door lock
buzzer signalBuzzer does not soundBelow 1 V
BZR ± GND1
(B7±15 ± B6±6)LG ± W±BWireless door lock
buzzer signalBuzzer sounds10 to 14 V
RLD ± GND1
(B7±26 ± B6±6)L ± W±BPower window control
(Rear LH (DOWN))Ignition switch ONBelow 1 V
RLD ± GND1
(B7±26 ± B6±6)L ± W±BPower window control
(Rear LH (DOWN))Ignition switch ON,
Rear left power window DOWN
operation
10 to 14 V
RLU ± GND1
(B7±25 ± B6±6)G±R ± W±BPower window control
(Rear LH (UP))Ignition switch ONBelow 1 V
RLU ± GND1
(B7±25 ± B6±6)G±R ± W±BPower window control
(Rear LH (UP))Ignition switch ON,
Rear left power window UP op-
eration
10 to 14 V
RRD ± GND1
(B5±20 ± B6±6)L ± W±BPower window control
(Rear RH (DOWN))Ignition switch ONBelow 1 V
RRD ± GND1
(B5±20 ± B6±6)L ± W±BPower window control
(Rear RH (DOWN))Ignition switch ON,
Rear right power window DOWN
operation
10 to 14 V
RRU ± GND1
(B5±19 ± B6±6)G±Y ± W±BPower window control
(Rear RH (UP))Ignition switch ONBelow 1 V
RRU ± GND1
(B5±19 ± B6±6)G±Y ± W±BPower window control
(Rear RH (UP))Ignition switch ON,
Rear right power window UP op-
eration
10 to 14 V
HEAD ± GND1
(B6±9 ± B6±6)G±Y ± W±BLight control switch
(HEAD)Light control switch HEADBelow 1 V
HEAD ± GND1
(B6±9 ± B6±6)G±Y ± W±BLight control switch
(HEAD)Light control switch OFF or TAIL10 to 14 V
PKB ± GND1
(B5±3 ± B6±6)LG±R ± W±BParking brake switch
signalIgnition switch ON, Parking brake
appliedBelow 1 V
PKB ± GND1
(B5±3 ± B6±6)LG±R ± W±BParking brake switch
signalIgnition switch ON, Parking brake
not applied10 to 14 V
GSWGR RAirbag sensor commu-Airbag sensor communicationGSW
(B6±16)GR±RAirbag sensor commu
nication signal
Airbag sensor communication
circuit±
OBD2
(B5±2)G±RDiagnosis signalDLC3 communication circuit±
FFOG ± GND1
(B6±13 ± B6±6)G±B ± W±BFog light switch signalHeadlight dimmer switch LOW,
Fog light switch OFFBelow 1 V