2001 TOYOTA SEQUOIA wheel

± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±975
1169 Author: Date:
2005 SEQUOIA (RM1146U)
DTC C1337 / 37 Some Tire Are Different in Size From
the Other Tires
CIRCUIT DESCRIPTION
Skid control ECU measure the speed of each wheel by receiving signals from speed sensor. These signals
are used for recognizing all 4 wheels are operating properly. Therefore, all wheel signals must be equal.
DTC No.DTC Detecting ConditionTrouble Area
C1337 / 371 or 2 tires of different size are used for driving.Tire size
INSPECTION PROCEDURE
1 Check tire size.
CHECK:
Check tire size and condition of all 4 wheels.
NG Replace tires so that all 4 tires are the same in
size.
OK
2 Check speed sensor (See page DI±925).
NG Replace speed sensor.
OK
3 Check speed sensor rotor (See page DI±925).
NG Replace speed sensor rotor.
OK
DI93T±03

DIDGH±01
H24019
Spiral CableFront Passenger
Airbag Assembly
Side Airbag Assembly LH (*1)
Front Seat
Outer Belt LH
Side Airbag Sensor
Assembly LH (*1)Side Airbag
Assembly RH (*1)
Front Airbag
Sensor LH Steering Wheel
PadFront Airbag
Sensor RH
Curtain Shield Airbag
Assembly RH (*1) Curtain Shield Airbag
Assembly LH (*1)
Curtain Shield Airbag
Sensor Assembly RH (*1)
SRS Warning Light
Side Airbag Sensor
Assembly RH (*1)
Front Seat
Outer Belt RH
RSCA OFF Indicator (*1)Passenger Airbag
ON/OFF Indicator Integration Control and Panel: Combination Meter:
Seat Position
Airbag Sensor
Assembly
Curtain Shield Airbag
Sensor Assembly LH (*1)
Occupant Classification ECU
Front Seat Inner Belt RH
Front Seat Inner Belt LH
Airbag Sensor Assembly*1: w/ Side and Curtain Shield Airbag
RSCA OFF
Switch (*1)
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1119
1313 Author: Date:
2005 SEQUOIA (RM1146U)
LOCATION

DIDGI±01
H23977
Front Airbag Sensor LH
Side Airbag Sensor
Assembly LH (*1)
Curtain Shield Airbag
Sensor Assembly LH (*1)
Front Seat Inner Belt
LH/Seat Position Airbag
Sensor Assembly
RSCA OFF Switch (*1)
Front Seat Inner Belt RH
Occupant Classification
Sensors (Front LH, Front
RH, Rear LH, Rear RH)Steering Wheel Pad (D Squib)
Front Passenger Airbag Assembly (P Squib)
Side Airbag Assembly LH
(Side Squib LH) (*1)
Curtain Shield Airbag Assembly LH
(Curtain Shield Airbag LH Squib) (*1)
Front Seat Outer Belt LH (P/T Squib LH)
Combination Meter
(SRS Warning Light/RSCA OFF Indicator (*1))
Integration Control and Panel
(Passenger Airbag ON/OFF Indicator)
ECM
DLC3 Airbag
Sensor
Assembly
Occupant
Classification
ECU Front Airbag Sensor RH
Side Airbag Sensor
Assembly RH (*1)
Curtain Shield Airbag
Sensor Assembly RH (*1)Side Airbag Assembly RH
(Side Squib RH) (*1)
Curtain Shield Airbag Assembly RH
(Curtain Shield Airbag RH Squib) (*1)
Front Seat Outer Belt RH (P/T Squib RH)
*1: w/ Side and Curtain Shield Airbag DI±1120
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1314 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DIAGRAM

DIDGJ±02
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1121
1315 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DESCRIPTION
1. DESCRIPTION OF SUPPLEMENTAL RESTRAINT SYSTEM
(a) General description.
In this system, the airbag sensor assembly installed on the floor under the A/C unit determines whether
or not to activate the SRS airbags (driver airbag, passenger airbag, front seat airbags and curtain
shield airbags) and seat belt pretensioners by receiving the collision signal from each sensor (exclud-
ing the airbag sensor assembly). When there is trouble in the system, the airbag sensor assembly turns
on the SRS warning light on the combination meter to inform the driver.
(b) Description of the dual stage control.
The airbag sensor assembly controls the dual stage deployment of the driver airbag in the steering
wheel pad and the passenger airbag on the instrument panel. The airbag sensor assembly controls
the dual stage deployment of the driver airbag according to the collision impact, seat position and seat
belt ON/OFF state. It also controls the dual stage deployment of the passenger airbag according to
the collision impact and seat belt ON/OFF state.
(c) Description of the roll±over function.
(1) The airbag sensor assembly detects inclination signals from the inclination sensor installed on
the vehicle. The roll±over function ensures passenger safety by using these signals to activate
the RH and LH curtain shield airbag assembly and seat belt pretensioner when vehicle inclination
exceeds the specified value.
(2) An RSCA OFF switch (roll±over sensing curtain shield airbag OFF switch), which allows optional
deactivation of the roll±over function, is installed on the vehicle.
(d) Description of check mode (signal check).
This airbag sensor assembly is operable using the check mode of the hand±held tester function. Check
mode can detect and output DTC by using a hand±held tester to switch the airbag sensor assembly
to the check mode.
A simulation method is used, if the malfunction cannot be reproduced during troubleshooting (the mal-
function is temporarily solved, etc.). In this case, joggling each connector, or driving on a city or rough
road with the airbag sensor assembly in check mode makes it possible to obtain a more accurate mal-
function condition.

DIDGL±01
H24009
A19A20A21
17
24 18
23 19
22 20
21 4 8372615
12 13 11 14 10
15 9
16
28 27 26 25 30 294 8372615 4 8372615
10 9 12 13 11 14 15 16 10 9 12 13 11 14 15 16
17 18 19 20 24 23 22 21 17 18 19 20 24 23 22 21
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1133
1327 Author: Date:
2005 SEQUOIA (RM1146U)
TERMINALS OF ECU
1. AIRBAG SENSOR ASSEMBLY
Terminal No.Terminal SymbolDestination
A19±1 (*1)SFL+Side airbag assembly LH (Side squib LH)
A19±2 (*1)SFL±Side airbag assembly LH (Side squib LH)
A19±3 (*1)ICL±Curtain shield airbag assembly LH (Curtain shield airbag LH
squib)
A19±4 (*1)ICL+Curtain shield airbag assembly LH (Curtain shield airbag LH
squib)
A19±5PL+Front seat outer belt LH (P/T squib LH)
A19±6PL±Front seat outer belt LH (P/T squib LH)
A19±9LSP+Seat position airbag sensor assembly
A19±10LBE+Front seat inner belt RH (Seat belt buckle switch LH)
A19±17LSP±Seat position airbag sensor assembly
A19±18LBE±Front seat inner belt RH (Seat belt buckle switch LH)
A19±19 (*1)VUPLSide airbag sensor assembly LH
A19±20 (*1)VUCLCurtain shield airbag sensor assembly LH
A19±21 (*1)ESLSide airbag sensor assembly LH
A19±22 (*1)ESCLCurtain shield airbag sensor assembly LH
A20±1P2+Front passenger airbag assembly (P squib (Dual stage ± 2nd
step))
A20±2P2±Front passenger airbag assembly (P squib (Dual stage ± 2nd
step))
A20±3P±Front passenger airbag assembly (P squib)
A20±4P+Front passenger airbag assembly (P squib)
A20±5D+Steering wheel pad (D squib)
A20±6D±Steering wheel pad (D squib)
A20±7D2±Steering wheel pad (D squib (Dual stage ± 2nd step))
A20±8D2+Steering wheel pad (D squib (Dual stage ± 2nd step))
A20±13PBEWIntegration control and panel (Seat belt warning light)
A20±14LACombination meter (SRS warning light)
A20±15TCDLC3

H24029
Curtain Shield Airbag
Sensor Assembly RH
(*1)
Side Airbag Sensor
Assembly RH (*1)
Front Airbag
Sensor RH
RSCA OFF Switch
(*1)
Airbag Sensor
Assembly
Front Airbag
Sensor LH
Side Airbag Sensor
Assembly LH (*1)
Curtain Shield AIrbag
Sensor Assembly LH
(*1)Spiral CableTo
Occupant
Classification ECU
Front Seat Outer
Belt RH
(P/T Squib RH)
Side Airbag
Assembly RH
(Side Squib RH) (*1)
Front Passenger
Airbag Assembly
(P Squib)
Integration Control
and Panel
(Passenger Airbag
ON/OFF Indicator)
Combination Meter
(SRS Warning Light/
RSCA OFF Indicator
(*1))
Steering Wheel
Pad (D Squib)
Side Airbag
Assembly LH
(Side Squib LH) (*1)
Curtain Shield Airbag
Assembly LH (Curtain
Shield Airbag LH
Squib) (*1)
Front Seat Outer
Belt LH
(P/T Squib LH)
Seat Position AIrbag
Sensor Assembly/
Front Seat Inner Belt LH
(Buckle Switch LH)Curtain Shield Airbag
Assembly RH
(Curtain Shield Airbag
RH Squib) (*1)
9 13
10 14
11
1512
16 15
2 6
37
4 8
25 29
26 30
27 33
28 34
1721
1822
19 23
2024
3
4
7
89
10
13
14 11
1227
28
29
30 31
32
31
32 DI±1144
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1338 Author: Date:
2005 SEQUOIA (RM1146U)

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