TOYOTA SEQUOIA 2001 Service Repair Manual

H13049
Ignition
Switch
DLC3
SRS Warning
Light (*)
OFFON
OFFON Open
Short
T1 T4T6
T2T5 T7 0.5 sec.
T1: 0 to 8 second
T2: approx. 6 seconds
T3: 3 to 5 seconds
T4: 3 to 10 seconds
T5: 2 to 4 seconds
T6: 1 to 5 seconds
T7: within 1 secondT31.5 sec.0.25 sec.
T6 T5
T6 T5 T5
0.25 sec.
*: The past trouble code in the illustration shows DTC 21 as an example.0.5 sec. TC
CG
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1149
1343 Author: Date:
2005 SEQUOIA (RM1146U)
(7) Check if the SRS warning light goes off 2 to 4 se-
conds after connecting terminals TC and CG of the
DLC3. Also check if the normal system code is out-
put within 1 second after the SRS warning light goes
off.
If DTCs are not cleared, repeat this procedure until the codes
are cleared.

A08841
Hand±held Tester
DLC3
DI±1150
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1344 Author: Date:
2005 SEQUOIA (RM1146U)
3. CHECK DTC (Using hand±held tester)
HINT:
Refer to the hand±held tester operator's manual for further de-
tails.
(a) Check the DTCs.
(1) Connect the hand±held tester to the DLC3.
(2) Turn the ignition switch to the ON position.
(3) Check the DTCs by following the prompts on the
tester screen.
HINT:
When check the DTC of the occupant classification ECU, select
the ºOCCUPANT DETECTº on the hand±held tester.
(b) Clear the DTCs.
(1) Connect the hand±held tester to the DLC3.
(2) Turn the ignition switch to the ON position.
(3) Clear the DTCs by following the prompts on the tes-
ter screen.
HINT:
When clear the DTC of the occupant classification ECU, select
the ºOCCUPANT DETECTº on the hand±held tester.

DIDGO±01
A08841
Hand±held Tester
DLC3
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1151
1345 Author: Date:
2005 SEQUOIA (RM1146U)
CHECK MODE PROCEDURE
Using hand±held tester:
CHECK MODE (SIGNAL CHECK)
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to ON position.
(c) Select the ºSIGNAL CHECKº, and proceed cheeking with
the hand±held tester screen.
HINT:
Hand±held tester only:
Compared to the normal mode, the check mode has an in-
creased sensitivity to detect malfunctions. Furthermore, the
same diagnostic items as ones detected in the normal mode
can also be detected in the check mode.

DIDGP±01
DI±1152
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1346 Author: Date:
2005 SEQUOIA (RM1146U)
DATA LIST / ACTIVE TEST
HINT:
By accessing the DATA LIST displayed by the hand±held tester, you can perform such functions as reading
the values of the switches and sensors without removing any parts. Reading the DATA LIST is the first step
of troubleshooting and is one method to shorten labor time.
1. DATA LIST FOR AIRBAG SENSOR ASSEMBLY
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Following the display on the tester screen, read the ºDATA LISTº.
ItemMeasurement tem/
Range (Display)Normal ConditionDiagnostic Note
D SEAT POSITION
Seat position (Driver side)/
FORWARD: Seat position
is forward
BKWARD: Seat position is
rearward
FAIL: A failure is detected
FORWARD/BKWARD±
PASSENGER CLASS
Passenger classification/
NG: Data is not deter-
mined
NONE: Vacant
CHILD: Child (less than 36
kg (79.37 lb)) is seated
SMALL: Adult (36 to 54 kg
(79.37 to 119.05 lb)) is
seated
REGULAR: Adult (more
than 54 kg (119.05 lb)) is
seated
FAIL: A failure is detected
NG/NONE/CHILD/SMALL/
REGULAR±
D BUCKLE SW
Buckle switch (Driver side)/
UNSET: The seat belt is
not fastened
SET: The seat belt is fas-
tened
NG: Data is not deter-
mined
UNSET/SET±
P BUCKLE SW
Buckle switch (Passenger
side)/
UNSET: The seat belt is
not fastened
SET: The seat belt is fas-
tened
NG: Data is not deter-
mined
UNSET/SET±
DISPLAY TYPE
Display type identification
information/
LR: The display is indi-
cated by LH/RH
DP: The display is indi-
cated by Driver/Passenger
LR/DPFor this vehicle, the display
is displayed by LH/RH.

± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1153
1347 Author: Date:
2005 SEQUOIA (RM1146U)
2. DATA LIST FOR OCCUPANT CLASSIFICATION ECU
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Following the display on the tester screen, read the ºDATA LISTº.
ItemMeasurement Item/
Range (Display)Normal ConditionDiagnostic Note
IG SW
Ignition switch condition/
ON: Ignition switch ON
OFF: Ignition switch OFF
ON/OFF±
P BUCKLE SW
Buckle switch (Passenger
side)/
OFF: Unfasten the pas-
senger side seat belt
ON: Fasten the passenger
side seat belt
NG: Passenger side seat
belt has a trouble
OFF/ON±
PASSENGER CLASS
Passenger classification/
AF05: Adult (36 to 54 kg
(79.37 to 119.05 lb)) is
seated
AM50: Adult (more than 54
kg (119.05 lb)) is seated
CHILD: Child (less than 36
kg (79.37 lb) is seated
CRS: Child restraint sys-
tem (less than 7 kg (15.43
lb)) and passenger side
buckle switch is ON, then
7 to 36 kg (15.43 to 79.37
lb)) is set
OFF: Vacant
AF05/AM50/CHILD/CRS/
OFF±
SENS RANGE INF
Sensor range information/
OK: The value of a sensor
is within the range
NG: The value of a sensor
is over the range
OK±
FL SENS RANGE
Front left sensor range in-
formation/
OK: Sensor range is ±17
to 27 kg (±37.48 to 59.52
lb)
Min.: Less than ±17 kg
(±37.48 lb)
Max.: More than 27 kg
(59.52 lb)
OK±
FR SENS RANGE
Front right sensor range in-
formation/
OK: Sensor range is ±17
to 27 kg (±37.48 to 59.52
lb)
Min.: Less than ±17 kg
(±37.48 lb)
Max.: More than 27 kg
(59.52 lb)
OK±

DI±1154
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1348 Author: Date:
2005 SEQUOIA (RM1146U)
RL SENS RANGE
Rear left sensor range in-
formation/
OK: Sensor range is ±17
to 37 kg (±37.48 to 81.57
lb)
Min.: Less than ±17 kg
(±37.48 lb)
Max.: More than 37 kg
(81.57 lb)
OK±
RR SENS RANGE
Rear right sensor range in-
formation/
OK: Sensor range is ±17
to 37 kg (±37.48 to 81.57
lb)
Min.: Less than ±17 kg
(±37.48 lb)
Max.: More than 37 kg
(81.57 lb)
OK±
FL SENS VOL
Front left sensor voltage/
Min.: 0 V
Max.: 19.8 V
0 to 4.7 V±
FR SENS VOL
Front right sensor voltage/
Min.: 0 V
Max.: 19.8 V
0 to 4.7 V±
RL SENS VOL
Rear left sensor voltage/
Min.: 0 V
Max.: 19.8 V
0 to 4.7 V±
RR SENS VOL
Rear right sensor voltage/
Min.: 0 V
Max.: 19.8 V
0 to 4.7 V±
FL SENS WEIGHT
Front left sensor weight in-
formation/
Min.: ±17 kg (±37.48 lb)
Max.: 27 kg (59.52 lb)
±17 to 27 kg
(±37.48 to 59.52 lb)±
FR SENS WEIGHT
Front right sensor weight
information/
Min.: ±17 kg (±37.48 lb)
Max.: 27 kg (59.52 lb)
±17 to 27 kg
(±37.48 to 59.52 lb)±
RL SENS WEIGHT
Rear left sensor weight in-
formation/
Min.: ±17 kg (±37.48 lb)
Max.: 37 kg (81.57 lb)
±17 to 37 kg
(±37.48 to 81.57 lb)±
RR SENS WEIGHT
Rear right sensor weight
information/
Min.: ±17 kg (±37.48 lb)
Max.: 37 kg (81.57 lb)
±17 to 37 kg
(±37.48 to 81.57 lb)±
TOTAL WEIGHT
Total weight information/
Min.: ±40 kg (±88.18 lb)
Max.: 100 kg (220.46 lb)±68 to 128 kg
(±149.91 to 282.19 lb)±
#PRESENT CODESNumber of DTC/
Min.: 0, Max.: 2550±
#PAST CODESNumber of Past DTC/
Min.: 0, Max.: 2550±

DIDGQ±01
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1155
1349 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSTIC TROUBLE CODE CHART
1. DTCS FOR SUPPLEMENTAL RESTRAINT 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 SRS warning light remains on and the DTC output is the normal system code, a voltage
source drop is likely to occur. This malfunction is not stored in the memory by the airbag sensor assem-
bly. If the power source voltage returns to normal, the SRS warning light will automatically go off.

When 2 or more codes are indicated, the code with the lower number appears first.

If a code is not listed on the display chart, the airbag sensor assembly may have failed.

In the case of any malfunction concerning an open circuit, short to ground, or short to B+ due to a squib,
other malfunction codes may not be detected. In this case, repair the malfunction currently indicated
and then perform malfunction diagnosis again.

Mark in the check mode column:
ºº: DTC is corresponding to the check mode.
º º: DTC is not corresponding to the check mode.

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.
DTC No.
(See
Page)
Detection ItemTrouble AreaCheck ModeSRS
Warning Light
B1000/31
(DI±1161)
Airbag sensor assembly malfunction
Airbag sensor assemblyON
B1610/13
(DI±1162)
Front airbag sensor RH malfunction

Front airbag sensor RH

Airbag sensor assembly

Cowl wire

Engine room main wire
ON
B1615/14
(DI±1171)
Front airbag sensor LH malfunction

Front airbag sensor LH

Airbag sensor assembly

Cowl wire

Engine room main wire
ON
B1620/21
(*1)
(DI±1180)

Side airbag sensor assembly RH malfunction

Side airbag sensor assembly RH

Airbag sensor assembly

Floor wire
ON
B1625/22
(*1)
(DI±1186)

Side airbag sensor assembly LH malfunction

Side airbag sensor assembly LH

Airbag sensor assembly

Floor wire No. 2
ON
B1630/23
(*1)
(DI±1192)

Curtain shield airbag sensor RH malfunction

Curtain shield airbag sensor assembly RH

Airbag sensor assembly

Floor wire
ON
B1635/24
(*1)
(DI±1198)

Curtain shield airbag sensor LH malfunction

Curtain shield airbag sensor assembly LH

Airbag sensor assembly

Floor wire No. 2
ON
B1650/32
(DI±1204)
Occupant classification system malfunction

Occupant classification system

Airbag sensor assembly

Floor wire

Seat wire No. 1
ON
B1653/35
(DI±1213)
Seat position sensor assembly malfunction

Seat position airbag sensor assembly

Airbag sensor assembly

Floor wire No. 2
ON

DI±1156
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1350 Author: Date:
2005 SEQUOIA (RM1146U)B1656/38
(DI±1220)

Seat belt buckle switch LH malfunction

Front seat inner belt LH

Airbag sensor assembly

Floor wire No. 2
ON
B1660/43
(DI±1227)
Passenger airbag ON/OFF indicator malfunction

Integration control and panel (Passenger
airbag ON/OFF indicator)

Airbag sensor assembly

Cowl wire
ON
B1661/44
(*1)
(DI±1238)

Roll over cut off indicator malfunction

Combination meter (RSCA OFF indicator)

Airbag sensor assembly

Cowl wire
ON
B1662/45
(DI±1247)
SRS warning light circuit malfunction

Combination meter (SRS warning light)

Airbag sensor assembly

Cowl wire
ON
B1800/51
(DI±1352)
Short in D squib circuit

Steering wheel pad (D squib)

Spiral cable

Airbag sensor assembly

Cowl wire
ON
B1801/51
(DI±1352)
Open in D squib circuit

Steering wheel pad (D squib)

Spiral cable

Airbag sensor assembly

Cowl wire
ON
B1802/51
(DI±1352)
Short in D squib circuit (to ground)

Steering wheel pad (D squib)

Spiral cable

Airbag sensor assembly

Cowl wire
ON
B1803/51
(DI±1352)
Short in D squib circuit (to B+)

Steering wheel pad (D squib)

Spiral cable

Airbag sensor assembly

Cowl wire
ON
B1805/52
(DI±1374)
Short in P squib circuit

Front passenger airbag assembly (P squib)

Airbag sensor assembly

Cowl wire
ON
B1806/52
(DI±1374)
Open in P squib circuit

Front passenger airbag assembly (P squib)

Airbag sensor assembly

Cowl wire
ON
B1807/52
(DI±1374)
Short in P squib circuit (to ground)

Front passenger airbag assembly (P squib)

Airbag sensor assembly

Cowl wire
ON
B1808/52
(DI±1374)
Short in P squib circuit (to B+)

Front passenger airbag assembly (P squib)

Airbag sensor assembly

Cowl wire
ON
B1810/53
(DI±1384)
Short in D squib (Dual stage ± 2nd step) circuit

Steering wheel pad (D squib, Dual stage ±
2nd step)

Spiral cable

Airbag sensor assembly

Cowl wire
ON
B1811/53
(DI±1384)
Open in D squib (Dual stage ± 2nd step) circuit

Steering wheel pad (D squib, Dual stage ±
2nd step)

Spiral cable

Airbag sensor assembly

Cowl wire
ON

± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1157
1351 Author: Date:
2005 SEQUOIA (RM1146U)B1812/53
(DI±1384)

Short in D squib (Dual stage ± 2nd step) circuit
(to ground)

Steering wheel pad (D squib, Dual stage ±
2nd step)

Spiral cable

Airbag sensor assembly

Cowl wire
ON
B1813/53
(DI±1384)
Short in D squib (Dual stage ± 2nd step) circuit
(to B+)

Steering wheel pad (D squib, Dual stage ±
2nd step)

Spiral cable

Airbag sensor assembly

Cowl wire
ON
B1815/54
(DI±1406)
Short in P squib (Dual stage ± 2nd step) circuit

Front passenger airbag assembly (P squib,
Dual stage ± 2nd step)

Airbag sensor assembly

Cowl wire
ON
B1816/54
(DI±1406)
Open in P squib (Dual stage ± 2nd step) circuit

Front passenger airbag assembly (P squib,
Dual stage ± 2nd step)

Airbag sensor assembly

Cowl wire
ON
B1817/54
(DI±1406)
Short in P squib (Dual stage ± 2nd step) circuit
(to ground)

Front passenger airbag assembly (P squib,
Dual stage ± 2nd step)

Airbag sensor assembly

Cowl wire
ON
B1818/54
(DI±1406)
Short in P squib (Dual stage ± 2nd step) circuit
(to B+)

Front passenger airbag assembly (P squib,
Dual stage ± 2nd step)

Airbag sensor assembly

Cowl wire
ON
B1820/55
(*1)
(DI±1416)

Short in side squib RH circuit

Side airbag assembly RH (Side squib RH)

Airbag sensor assembly

Floor wire
ON
B1821/55
(*1)
(DI±1416)

Open in side squib RH circuit

Side airbag assembly RH (Side squib RH)

Airbag sensor assembly

Floor wire
ON
B1822/55
(*1)
(DI±1416)

Short in side squib RH circuit (to ground)

Side airbag assembly RH (Side squib RH)

Airbag sensor assembly

Floor wire
ON
B1823/55
(*1)
(DI±1416)

Short in side squib RH circuit (to B+)

Side airbag assembly RH (Side squib RH)

Airbag sensor assembly

Floor wire
ON
B1825/56
(*1)
(DI±1426)

Short in side squib LH circuit

Side airbag assembly LH (Side squib LH)

Airbag sensor assembly

Floor wire No. 2
ON
B1826/56
(*1)
(DI±1426)

Open in side squib LH circuit

Side airbag assembly LH (Side squib LH)

Airbag sensor assembly

Floor wire No. 2
ON
B1827/56
(*1)
(DI±1426)

Short in side squib LH circuit (to ground)

Side airbag assembly LH (Side squib LH)

Airbag sensor assembly

Floor wire No. 2
ON
B1828/56
(*1)
(DI±1426)

Short in side squib LH circuit (to B+)

Side airbag assembly LH (Side squib LH)

Airbag sensor assembly

Floor wire No. 2
ON
B1830/57
(*1)
(DI±1436)

Short in curtain shield airbag RH squib circuit

Curtain shield airbag assembly RH
(Curtain shield airbag RH squib)

Airbag sensor assembly

Floor wire
ON

DI±1158
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1352 Author: Date:
2005 SEQUOIA (RM1146U)B1831/57
(*1)
(DI±1436)

Open in curtain shield airbag RH squib circuit

Curtain shield airbag assembly RH
(Curtain shield airbag RH squib)

Airbag sensor assembly

Floor wire
ON
B1832/57
(*1)
(DI±1436)
Short in curtain shield airbag RH squib circuit
(to ground)

Curtain shield airbag assembly RH
(Curtain shield airbag RH squib)

Airbag sensor assembly

Floor wire
ON
B1833/57
(*1)
(DI±1436)
Short in curtain shield airbag RH squib circuit
(to B+)

Curtain shield airbag assembly RH
(Curtain shield airbag RH squib)

Airbag sensor assembly

Floor wire
ON
B1835/58
(*1)
(DI±1447)

Short in curtain shield airbag LH squib circuit

Curtain shield airbag assembly LH
(Curtain shield airbag LH squib)

Airbag sensor assembly

Floor wire No. 2
ON
B1836/58
(*1)
(DI±1447)

Open in curtain shield airbag LH squib circuit

Curtain shield airbag assembly LH
(Curtain shield airbag LH squib)

Airbag sensor assembly

Floor wire No. 2
ON
B1837/58
(*1)
(DI±1447)
Short in curtain shield airbag LH squib circuit
(to ground)

Curtain shield airbag assembly LH
(Curtain shield airbag LH squib)

Airbag sensor assembly

Floor wire No. 2
ON
B1838/58
(*1)
(DI±1447)
Short in curtain shield airbag LH squib circuit
(to B+)

Curtain shield airbag assembly LH
(Curtain shield airbag LH squib)

Airbag sensor assembly

Floor wire No. 2
ON
B1900/73
(DI±1458)
Short in P/T squib RH circuit

Front seat outer belt RH (P/T squib RH)

Airbag sensor assembly

Floor wire
ON
B1901/73
(DI±1458)
Open in P/T squib RH circuit

Front seat outer belt RH (P/T squib RH)

Airbag sensor assembly

Floor wire
ON
B1902/73
(DI±1458)
Short in P/T squib RH circuit (to ground)

Front seat outer belt RH (P/T squib RH)

Airbag sensor assembly

Floor wire
ON
B1903/73
(DI±1458)
Short in P/T squib RH circuit (to B+)

Front seat outer belt RH (P/T squib RH)

Airbag sensor assembly

Floor wire
ON
B1905/74
(DI±1469)
Short in P/T squib LH circuit

Front seat outer belt LH (P/T squib LH)

Airbag sensor assembly

Floor wire No. 2
ON
B1906/74
(DI±1469)
Open in P/T squib LH circuit

Front seat outer belt LH (P/T squib LH)

Airbag sensor assembly

Floor wire No. 2
ON
B1907/74
(DI±1469)
Short in P/T squib LH circuit (to ground)

Front seat outer belt LH (P/T squib LH)

Airbag sensor assembly

Floor wire No. 2
ON
B1908/74
(DI±1469)
Short in P/T squib LH circuit (to B+)

Front seat outer belt LH (P/T squib LH)

Airbag sensor assembly

Floor wire No. 2
ON