SAS sensor TOYOTA SEQUOIA 2001 Service Repair Manual

IN±10
± INTRODUCTIONFOR ALL OF VEHICLES
10 Author: Date:
2005 SEQUOIA (RM1146U)
(3) Even in case of a minor collision where the SRS
does not deploy, the steering wheel pad, the pas-
senger airbag assembly, side airbag assembly, cur-
tain shield airbag assembly, seat belt pretensioner,
airbag sensor assembly, front airbag sensor, side
airbag sensor assembly and curtain shield airbag
sensor assembly should be inspected.
Parts of referenceSee page
Steering wheel padSee page RS±22
Passenger side airbag assemblySee page RS±35
Side airbag assembly
Power adjuster type
Manual adjuster type
See page RS±49
See page RS±64
Curtain shield airbag assemblySee page RS±72
Seat belt pretensionerSee page BO±165
Airbag sensor assemblySee page RS±83
Front airbag sensor assemblySee page RS±88
Side airbag sensor assemblySee page RS±93
Curtain shield airbag sensor assemblySee page RS±98
(4) Never use SRS parts from another vehicle. When
replacing parts, replace them with new ones.
(5) Before repairs, remove the airbag sensor because
shocks are likely to be applied to the sensor during
repairs.
(6) Never disassemble or repair the steering wheel
pad, front passenger airbag assembly, airbag sen-
sor assembly and front airbag sensor.
(7) If the steering wheel pad, front passenger airbag
assembly, side airbag assembly, curtain shield air-
bag assembly, seat belt pretensioner, airbag sensor
assembly and front airbag sensor have been
dropped, or if there are cracks, dents or other de-
fects in the case, bracket or connector, replace
them with new ones.
(8) Do not expose the steering wheel pad, front pas-
senger airbag assembly, side airbag assembly, cur-
tain shield airbag assembly, seat belt pretensioner,
airbag sensor assembly and front airbag sensor di-
rectly to hot air or flames.
(9) Use a volt/ohmmeter with high impedance (10 kW/V
minimum) for troubleshooting of the electrical cir-
cuit.
(10) Information labels are attached to the periphery of
the SRS components. Follow the instructions on the
notices.
(11) After work on the supplemental restraint system is
completed, check the SRS warning light (See page
DI±1118).

DI±268
± DIAGNOSTICSENGINE
462 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
NOTICE:

When a vehicle is brought into the workshop, leave it as it is. Do not change the vehicle condi-
tion. For example, do not tighten the fuel tank cap.

Do not disassemble the pump module.

A hand±held tester is required to conduct the following diagnostic troubleshooting procedure.
1 Confirm DTC and EVAP pressure.
PREPARATION:
(a) Connect a hand±held tester to the DLC3.
(b) Turn the ignition switch to ON (do not start the engine).
(c) Turn the tester ON.
CHECK:
(a) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
(b) Read DTCs.
(c) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / VAPOR
PRESS.
(d) Read the EVAP (Evaporative Emission) pressure displayed on the tester.
RESULT:
Display (DTC Output)Test ResultsSuspected Trouble AreasProceed To
P0451'
Pressure sensorC
P0452Less than 45 kpa (430 mmHg)

Wire harness/connector (ECM ± pressure
sensor)

Pressure sensor

Short in ECM circuit
A
P0453More than 120 kPa (900 mmHg)

Wire harness/connector (ECM ± pressure
sensor)

Pressure sensor

Open in ECM circuit
B
B Go to step 4.
C Go to EVAP inspection procedure
(See page DI±460).
A

± DIAGNOSTICSENGINE
DI±463
657 Author: Date:
2005 SEQUOIA (RM1146U)Components
Operations
CanisterContains activated charcoal to absorb EVAP (Evaporative Emissions) generated in fuel tank.
Cut±off valveLocated in fuel tank. Valve floats and closes when fuel tank is 100 % full.
Purge VSV (Vacuum
Switching Valve)Opens or closes line between canister and intake manifold. ECM uses purge VSV to control EVAP purge flow. In order
to discharge EVAP absorbed by canister to intake manifold, ECM opens purge VSV. EVAP discharge volume to intake
manifold controlled by purge VSV duty cycle ratio (current±carrying time). (Open: ON, Close: OFF)
Refueling valve
Controls EVAP pressure from fuel tank to canister. Valve consists of diaphragm, spring and restrictor (diameter: 0.08
inch). When fuel vapor and pressure inside fuel tank increase, valve opens. While EVAP purged, valve closes and re-
strictor prevents large amount of vacuum from affecting pressure in fuel tank. Valve opened while refueling. When valve
open, adding fuel into fuel tank possible.
Roll±over valveLocated in fuel tank. Valve closes by its own weight when vehicle overturns to prevent fuel from spilling out.
Service portUsed for connecting vacuum gauge for inspecting EVAP system.
Soak timerBuilt into ECM. To ensure accurate EVAP monitor, measures 5 hours* after ignition switch turned to OFF. This allows
fuel to cool down, stabilizing Fuel Tank Pressure (FTP). When approx. 5 hours
* elapsed, ECM activates.
Pump moduleConsists of (a) to (d) below. Pump module cannot be disassembled.
(a) Vent valve
Vents and closes EVAP system. When ECM turns valve ON, EVAP system closed. When, ECM turns valve OFF, EVAP
system vented. Negative pressure (vacuum) created in EVAP system to check for EVAP leaks by closing purge VSV,
turning on vent valve (closed) and operating vacuum pump (refer to fig. 1).
(b) Pressure sensorIndicates pressure as voltages. ECM supplies regulated 5 V to pressure sensor, and uses feedback from sensor to
monitor EVAP system pressure (refer to fig 2).
(c) Vacuum pumpCreates negative pressure (vacuum) in EVAP system for leak check.
(d) 0.02 inch orificeHas opening with 0.02 inch diameter. Vacuum produced through orifice by closing purge VSV, turning off vent valve and
operating vacuum pump, to monitor 0.02 inch leak pressure. 0.02 inch leak pressure indicates small leak of EVAP.
HINT:
*:If the engine coolant temperature is not below 35C after 5 hours after the ignition switch is turned off, the
monitor check starts 2 hours later. If it is still not below 35C 7 hours after the ignition switch is turned off,
the monitor check starts 2.5 hours later.

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.)).

EM122±05
A05112
Pull
Wire
Clamp
O±Ring
A08472
LH Side
± ENGINE MECHANICALCYLINDER BLOCK
EM±101
2680 Author: Date:
2005 SEQUOIA (RM1146U)
DISASSEMBLY
1. INSTALL ENGINE TO ENGINE STAND
2. REMOVE TIMING BELT AND PULLEYS
(See page EM±16)
3. REMOVE CYLINDER HEAD (See page EM±36)
4. REMOVE WATER BYPASS PIPE
(a) Disconnect the wire clamp (for knock sensor 1, 2) from
bracket of the water bypass pipe.
(b) Remove the bolt.
(c) Pull out the water bypass pipe from the water pump.
(d) Remove the O±ring from the water bypass pipe.
5. REMOVE STARTER (See page ST±5)
6. REMOVE KNOCK SENSORS (See page SF±66)
7. REMOVE VVT SENSORS (See page SF±77)
8. DISCONNECT ENGINE WIRE FROM LH SIDE OF CYL-
INDER BLOCK
(a) Remove the 2 bolts and engine wire cover from the LH
side of the cylinder block.
(b) Remove the 2 bolts, disconnect the brackets on the en-
gine wire from the cylinder block and engine mounting
bracket.
9. REMOVE OIL COOLER PIPE BRACKET FOR A/T
Remove the bolt and bracket.
10. REMOVE ENGINE MOUNTING BRACKETS
Remove the 4 bolts and mounting bracket. Remove the 2
mounting brackets.
11. REMOVE WATER PUMP (See page CO±6)
12. REMOVE NO.2 OIL PAN (See page LU±8)
13. REMOVE OIL PAN BAFFLE PLATE
14. REMOVE NO.1 OIL PAN (See page LU±8)
15. REMOVE OIL STRAINER
16. REMOVE OIL PUMP (See page LU±8)
17. REMOVE ENGINE COOLANT DRAIN UNIONS
Remove the 2 drain unions.

EC0O1±01
B17525
B17526
± EMISSION CONTROLSECONDARY AIR INJECTION SYSTEM
EC±23
2731 Author: Date:
2005 SEQUOIA (RM1146U)
DISASSEMBLY
1. REMOVE PRESSURE SENSOR
(a) Remove the vacuum hose from the pressure sensor and
air switching valve.
(b) Remove the 2 bolts and pressure sensor from the air
switching valve.
2. REMOVE AIR SWITCHING VALVE
(a) Remove the 2 bolts and air switching valve from the air
pump bracket.
(b) Remove the No.1 air hose from the air switching valve
and air pump.

SF1UN±02
± SFIACCELERATOR PEDAL POSITION SENSOR
SF±79
2813 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION
INSPECT ACCELERATOR PEDAL POSITION SENSOR (See page DI±370)
If necessary, replace the accelerator pedal assembly.
NOTICE:

Be care not to give a shock to the accelerator pedal assembly.

Be care not to disassemble the accelerator pedal assembly.

D13884
A750E:
A750F:AT133±01
D13885
A750E:
A750F:
± AUTOMATIC TRANSMISSION (A750E, A750F)SPEED SENSOR
AT±5
2913 Author: Date:
2005 SEQUOIA (RM1146U)
SPEED SENSOR
ON±VEHICLE REPAIR
1. DISCONNECT NO. 1 VEHICLE SPEED SENSOR CON-
NECTOR
2. REMOVE NO. 1 VEHICLE SPEED SENSOR
Remove the bolt and No.1 vehicle speed sensor.
3. DISASSEMBLE NO. 1 VEHICLE SPEED SENSOR
(a) Remove the O±ring from the speedometer driven gear
assembly.
(b) Remove the clip and speedometer driven gear from the
speedometer driven gear sleeve.
4. ASSEMBLE NO. 1 VEHICLE SPEED SENSOR
(a) Install the speedometer driven gear and clip to the
speedometer driven gear sleeve.
(b) Coat a new O±ring with ATF.
(c) Install the O±ring to the speedometer driven gear assem-
bly.
5. INSTALL NO. 1 VEHICLE SPEED SENSOR
Install the No.1 vehicle speed sensor with the bolt.
Torque:
A750E: 9.8 N´m (100 kgf´cm, 86 in.´lbf)
A750F: 11.5 N´m (117 kgf´cm, 8 ft´lbf)
6. CONNECT NO. 1 VEHICLE SPEED SENSOR CON-
NECTOR

SA145±08
R13215
SST
R13275
SST
SST SA±24
± SUSPENSION AND AXLEFRONT AXLE HUB
3020 Author: Date:
2005 SEQUOIA (RM1146U)
DISASSEMBLY
1. 2WD:
REMOVE GREASE CAP
(a) Mount the axle hub in a soft jaw vise.
HINT:
Close the vise until it holds hub bolts. Do not tighten further.
(b) Using a screwdriver, remove the grease cap.
2. 4WD:
REMOVE OIL SEAL (INSIDE)
(a) Mount the axle hub in a soft jaw vise.
HINT:
Close the vise until it holds hub bolts. Do not tighten further.
(b) Using a screwdriver, remove the oil seal (inside).
3. 2WD:
REMOVE LOCK NUT AND SPEED SENSOR ROTOR
(a) Using a chisel and hammer, loosen the staked part of the
lock nut.
NOTICE:
Be careful not to damage the bushing.
(b) Using SST, remove the lock nut.
SST 09318±12010
(c) Remove the speed sensor rotor.
NOTICE:
Take care not to scratch the serration of the speed sensor
rotor.
4. REMOVE AXLE HUB FROM STEERING KNUCKLE
(a) Remove the 4 bolts and shift the dust cover towards the
hub side (outside).
(b) Using SST, remove the axle hub from the steering
knuckle.
SST 09710±30021 (09710±03051),
09950±40011 (09951±04020, 09952±04010,
09953±04020, 09954±04010, 09955±04031,
09957±04010, 09958±04011)
(c) Remove the dust cover from the steering knuckle.
(d) 4WD:
Remove the bearing spacer and speed sensor rotor.
NOTICE:
Take care not to scratch the serration of the speed sensor
rotor.
5. REMOVE OIL SEAL (OUTSIDE)
Using a screwdriver, remove the oil seal (outside) from the
steering knuckle.
6. REMOVE BEARING FROM STEERING KNUCKLE
(a) Using snap ring pliers, remove the snap ring.

SA24A±02
F14277
F14278
F14279
F05103
SST
F14280
± SUSPENSION AND AXLEREAR AXLE SHAFT
SA±97
3093 Author: Date:
2005 SEQUOIA (RM1146U)
DISASSEMBLY
1. REMOVE BEARING RETAINER (DIFFERENTIAL SIDE)
AND SPEED SENSOR ROTOR
(a) Attach the 4 nuts to the serration bolts and remove the
serration bolts from the backing plate using a hammer.
NOTICE:
Do not reuse the nuts previously removed from the vehicle.
(b) Grind the retainer and sensor rotor surfaces using a grind-
er, then pry them out with a chisel and hammer.
2. REMOVE SNAP RING FROM AXLE SHAFT
Using a snap ring expander, remove the snap ring.
3. REMOVE REAR AXLE SHAFT FROM BACKING
PLATE AND BEARING ASSEMBLY
(a) Attach the washers and nut to the serration bolts, then
torque the nuts to install the serration bolts to the backing
plate.
(b) Remove the 4 nuts from the serration bolts.
(c) Position SST on the backing plate with the 4 nuts.
SST 09521±25011, 09521±25021
(d) Using a press, remove the rear axle shaft, spring washer
and bearing retainer from the backing plate.
(e) Remove the SST.
SST 09521±25011, 09521±25021
4. REMOVE OIL DEFLECTOR AND GASKET
Using a brass bar and hammer, remove the 6 hub bolts, oil de-
flector and gasket.