2001 TOYOTA SEQUOIA battery

DICY7±02
DI±1118
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1312 Author: Date:
2005 SEQUOIA (RM1146U)
SUPPLEMENTAL RESTRAINT SYSTEM
PRECAUTION
NOTICE:
When disconnecting the battery terminal, initialize the following system after the terminal is recon-
nected.
System NameSee Page
Back Door Power Window Control SystemBE±77
1. HANDLING PRECAUTIONS FOR AIRBAG SENSOR
HINT:
In this section, the airbag sensor assembly, front airbag sensor LH, front airbag sensor RH, side airbag sen-
sor assembly LH, side airbag sensor assembly RH, curtain shield airbag sensor assembly LH, curtain shield
airbag sensor assembly RH and seat position airbag sensor assembly are collectively referred to as the air-
bag sensor.
(a) Before starting the following operations, wait at least 90 seconds after disconnecting the negative (±)
terminal of the battery:
(1) Replacement of the airbag sensor.
(2) Adjustment of the front/rear doors of the vehicle equipped with the side airbag and curtain shield
airbag (fitting adjustment).
(b) When connecting or disconnecting the airbag sensor connector, ensure that all of the sensors are
installed in the vehicle.
(c) Do not use an airbag sensor which has been dropped during the operation or transportation.
(d) Do not disassemble the airbag sensor.
2. INSPECTION PROCEDURE FOR VEHICLE INVOLVED IN ACCIDENT
(a) When the airbag has not deployed, confirm the DTC by checking the SRS warning light. If there is any
malfunction in the SRS airbag system, perform troubleshooting.
(b) When any of the airbags have deployed, replace the airbag sensor and check the installation condition.
(c) Perform the zero point calibration and sensitivity check under the condition is listed below (see page
DI±1128).

The occupant classification ECU is replaced.

Accessories (seatback tray, seat cover, etc.) are installed.

The passenger seat removed from the vehicle.

The passenger airbag ON/OFF indicator (ºOFFº) comes on when the passenger seat is not occu-
pied.

The vehicle is brought to the workshop for repair due to an accident or a collision.
NOTICE:
When an accident vehicle is brought into the workshop for repair, check the flatness of the body side
that is installed on the passenger seat. If the flatness is not within ± 3.0 mm (0.118 in.), repair it to
the specified range (within ± 3.0 mm (0.118 in.)).

H22556
O6
O7
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1135
1329 Author: Date:
2005 SEQUOIA (RM1146U)
2. OCCUPANT CLASSIFICATION ECU
Terminal No. (Symbols)Wiring ColorTerminal DescriptionConditionSpecification
O6±1 (+B) ±
O6±3 (GND)W±R ± W±BBatteryIgnition switch ON10 to 14 V
O6±2 (DIA) ±
O6±3 (GND)G±R ± W±BDiagnosis (DLC3)Ignition switch ONPulse generation
O6±3 (GND) ±
Body groundW±B ± Body groundGroundAlwaysBelow 1 V
O6±4 (FSR±) ±
O6±3 (GND)B ± W±BAirbag sensor assy center
communication line (±)AlwaysBelow 1 V
O6±5 (BGND) ±
O6±3 (GND)L ± W±BPassenger side buckle
switch ground lineAlwaysBelow 1 V
O6±7 (IG) ± O6±3 (GND)B±O ± W±BPower source (IGN1 Fuse)Ignition switch ON10 to 14 V
O6±8 (FSR+) ±
O6±4 (FSR±)W ± BAirbag sensor assy center
communication lineIgnition switch ONPulse generation
O6±9 (BSW) ±
O6±5 (BGND)R ± LPassenger side buckle
switch lineAlwaysPulse generation
O7±1 (SGD1) ±
O6±3 (GND)O ± W±BOccupant classification
sensor front LH ground lineAlwaysBelow 1 V
O7±2 (SGD2) ±
O6±3 (GND)B±Y ± W±B
Occupant classification
sensor front RH ground
line
AlwaysBelow 1 V
O7±3 (SGD3) ±
O6±3 (GND)R±B ± W±BOccupant classification
sensor rear LH ground lineAlwaysBelow 1 V
O7±4 (SGD4) ±
O6±3 (GND)R±W ± W±BOccupant classification
sensor rear RH ground lineAlwaysBelow 1 V
O7±5 (SVC3) ±
O7±3 (SGD3)Y±B ± R±B
Occupant classification
sensor rear LH power sup-
ply lineIgnition switch ON, a load
is applied to occupant clas-
sification sensor rear LH
4.5 to 5.1 V
O7±6 (SVC4) ±
O7±4 (SGD4)Y ± R±W
Occupant classification
sensor rear RH power sup-
ply lineIgnition switch ON, a load
is applied to occupant clas-
sification sensor rear RH
4.5 to 5.1 V
O7±7 (SIG1) ±
O7±1 (SGD1)G ± OOccupant classification
sensor front LH signal lineIgnition switch ON, a load
is applied to occupant clas-
sification sensor front LH
0.2 to 4.9 V
O7±8 (SIG2) ±
O7±2 (SGD2)LG ± B±YOccupant classification
sensor front RH signal lineIgnition switch ON, a load
is applied to occupant clas-
sification sensor front RH
0.2 to 4.9 V
O7±9 (SIG3) ±
O7±3 (SGD3)G±B ± R±BOccupant classification
sensor rear LH signal lineIgnition switch ON, a load
is applied to occupant clas-
sification sensor rear LH
0.2 to 4.9 V
O7±10 (SIG4) ±
O7±4 (SGD4)L±W ± R±WOccupant classification
sensor rear RH signal lineIgnition switch ON, a load
is applied to occupant clas-
sification sensor rear RH
0.2 to 4.9 V

DIDGM±01
A04550
13 9 14 10 15 11 16 1251 62 73 84
DLC3
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1137
1331 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSIS SYSTEM
1. CHECK DLC3
The vehicle's ECM uses ISO 14230 for communication. The ter-
minal arrangement of the DLC3 complies with SAE J1962 and
matches the ISO 14230 format.
Terminal No.Connection/Voltage or ResistanceCondition
7Bus
Line/Pulse generationDuring Transmission
4Chassis Ground e Body Ground/Below 1 WAlways
16Battery Positive e Body Ground/10 to 14 VAlways
HINT:
If the display shows UNABLE TO CONNECT TO VEHICLE
when you have connected the cable of the OBD II scan tool or
hand±held tester to the DLC3, turned the ignition switch ON
and operated the scan tool, there is a problem on the vehicle
side or tool side.

If communication is normal when the tool is con-
nected to another vehicle, inspect the DLC3 on the
original vehicle.

If communication is still not possible when the tool
is connected to another vehicle, the problem is
probably in the tool itself, so consult the Service De-
partment listed in the tool's instruction manual.

± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1159
1353 Author: Date:
2005 SEQUOIA (RM1146U)Normal
(DI±1480)

Source voltage drop
Battery

Airbag sensor assemblyON
Normal
System normalOFF
*1: w/ Side and curtain shield airbag
2. DTCS FOR OCCUPANT CLASSIFICATION SYSTEM
If a trouble code is displayed during the DTC check, check the circuit listed for the code in the table below
(Proceed to the page listed for that circuit).
HINT:

When the DTC B1650/32 is detected as a result of troubleshooting for the Supplemental Restraint Sys-
tem, perform troubleshooting for the occupant classification system as shown in the chart below.

Use the hand±held tester to check/clear the DTC of the occupant classification ECU, otherwise the
DTC cannot be check/clear.
DTC No.
(See Page)Detection ItemTrouble AreaPassenger Airbag
ON/OFF Indicator
B1771
(DI±1251)
Passenger side buckle switch circuit
malfunction
Front seat inner belt RH

Occupant classification ECU

Seat wire No. 1
ON
B1780
(DI±1260)

Occupant classification sensor front
LH circuit malfunction
Front seat assembly RH (Occupant classification sensor
front LH)

Occupant classification ECU

Seat wire No. 1
ON
B1781
(DI±1270)

Occupant classification sensor front
RH circuit malfunction
Front seat assembly RH (Occupant classification sensor
front RH)

Occupant classification ECU

Seat wire No. 1
ON
B1782
(DI±1280)

Occupant classification sensor rear
LH circuit malfunction
Front seat assembly RH (Occupant classification sensor
rear LH)

Occupant classification ECU

Seat wire No. 1
ON
B1783
(DI±1290)

Occupant classification sensor rear
RH circuit malfunction
Front seat assembly RH (Occupant classification sensor
rear RH)

Occupant classification ECU

Seat wire No. 1
ON
B1785
(DI±1300)
Occupant classification sensor front
LH collision detection
Front seat assembly RH (Occupant classification sensor
front LH)

Occupant classification ECU
ON
B1786
(DI±1305)
Occupant classification sensor front
RH collision detection
Front seat assembly RH (Occupant classification sensor
front RH)

Occupant classification ECU
ON
B1787
(DI±1310)
Occupant classification sensor rear
LH collision detection
Front seat assembly RH (Occupant classification sensor
rear LH)

Occupant classification ECU
ON
B1788
(DI±1315)
Occupant classification sensor rear
RH collision detection
Front seat assembly RH (Occupant classification sensor
rear RH)

Occupant classification ECU
ON
B1790
(DI±1320)

Airbag sensor assembly communica-
tion circuit malfunction
Occupant classification ECU

Airbag sensor assembly

Floor wire

Seat wire No. 1
ON
B1793
(DI±1332)
Occupant classification sensor power
supply circuit malfunction
Occupant classification ECU

Front seat assembly RH (Occupant classification sensors)

Seat wire No. 1
ON

DI±1160
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1354 Author: Date:
2005 SEQUOIA (RM1146U)B1794
(DI±1342)

Occupant classification ECU battery
positive line open
Battery

ECU±B Fuse

Floor wire

Seat wire No. 1

Occupant classification ECU
ON
B1795
(DI±1348)
Occupant classification ECU circuit
malfunction
Occupant classification ECU

Seat wire No. 1

Front seat inner belt RH
ON
B1796
(DI±1350)
Sleep operation failure of occupant
classification ECU
Occupant classification ECUON

DIDGR±01
H10600H23564
DTC B1000/31
DLC3
TC CG
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1161
1355 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT INSPECTION
DTC B1000/31 Airbag Sensor Assembly Malfunction
CIRCUIT DESCRIPTION
The airbag sensor assembly consists of the airbag sensor, the safing sensor, the drive circuit, the diagnostic
circuit, ignition control, etc.
If the airbag sensor assembly receives signals from the airbag sensor, it determines whether or not the SRS
should be activated.
DTC B1000/31 is recorded when a malfunction is detected in the airbag sensor assembly.
DTC No.DTC Detection ConditionTrouble Area
B1000/31
Airbag sensor assembly malfunction
Airbag sensor assembly
HINT:
When a trouble code is displayed simultaneously with B1000/31, repair the malfunction indicated by this
code (except B1000/31) first.
INSPECTION PROCEDURE
1 Check 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) 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 60 seconds.
(b) Clear the DTCs stored in memory (see page DI±1147).
(c) Turn the ignition switch to the LOCK position.
(d) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(e) Check the DTCs (see page DI±1147).
OK:
DTC B1000/31 is not output.
NG Replace airbag sensor assembly
(see page RS±84).
OK
Using simulation method, reproduce malfunction symptoms (see page IN±24).

H02757H10600H40103H23566
CG
TCDTC B1610/13
DLC3 Front Airbag
Sensor RHAirbag
Sensor
Assembly
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1163
1357 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.
PREPARATION:
(a) Connect the connectors to the airbag sensor assembly.
(b) 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 60 seconds.
(b) Clear the DTCs stored in memory (see page DI±1147).
(c) Turn the ignition switch to the LOCK position.
(d) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(e) Check the DTCs (see page DI±1147).
OK:
DTC B1610/13 is not output.
HINT:
Codes other than DTC B1610/13 may be output at this time, but
they are not related to this check.
NG Go to step 2.
OK
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check (see page DI±1137).

H03353H08016G27651H23623
Front Airbag
Sensor RHAirbag
Sensor
Assembly
+SR
±SR
A
B D F
E
C C
Service Wire
+SR ±SR
A20A12
DI±1164
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1358 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check connection of connectors.
PREPARATION:
(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.
CHECK:
Check that the connectors are properly connected to the airbag sensor assembly and the front airbag sensor
RH.
OK:
The connectors are connected securely.
NG Connect connectors, then go to step 1.
OK
3 Check front airbag sensor RH circuit (open).
PREPARATION:
(a) Disconnect the connectors from the airbag sensor as-
sembly and the front airbag sensor RH.
(b) Using a service wire, connect A12±2 (+SR) and A12±1
(±SR) of connector ºEº.
NOTICE:
Do not forcibly insert a service wire into the terminals of the
connector when connecting.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
A20±29 (+SR) ±
A20±27 (±SR)AlwaysBelow 1 W
NG Go to step 8.
OK