2001 TOYOTA SEQUOIA brake

DI±1966
± DIAGNOSTICSAUDIO SYSTEM
2160 Author: Date:
2005 SEQUOIA (RM1146U)
5. Identify the condition in which the noise occurs, and check the noise filter on the related part.
Condition in which noise occursNoise Source
Depressing the acceleration pedal increases the noise, and stopping the
engine stops the noise immediately.Generator
Noise occurs during A/C or the heater operation.Blower motor
Rapid acceleration while driving on an unpaved road or after the ignition
switch is turned on makes noise.Fuel pump
Pressing and then releasing the horn switch, and keeping pressing the horn
switch makes unusual noise.Horn
Quiet noise is heard while the engine is running, but stops with the engine.Ignition
Noise occurs synchronously with the turn signal flash.Flasher
Noise occurs during window washer operation.Washer
Noise occurs while the engine is running, and it continues even after the en-
gine stops.Engine coolant temperature sensor
Noise occurs during wiper operation.Wiper
Noise occurs when the brake pedal is depressed.Stop light switch
Others.Static electricity stored on the vehicle
Reference:

Make sure first that there is no noise from outside. Failing to do so makes the noise source detec-
tion difficult and leads to misdiagnosis.

The noise should be removed in descending order of loudness.

Tuning the radio so that no station is received wakes the noise more noticeable, making the rec-
ognition of the phenomenon easier.

± DIAGNOSTICSAUDIO SYSTEM
DI±2027
2221 Author: Date:
2005 SEQUOIA (RM1146U)
Noise occurs
INSPECTION PROCEDURE
1 Check of speaker installation.
CHECK:
Check if each speaker is securely installed.
OK:
Each speaker is securely installed.
HINT:
The radio is equipped with a noise prevention system that blocks excessively loud noise. If such noise oc-
curs, check the all wiring is proper and that the antenna installation part ground and noise±prevention equip-
ment are installed.
Condition in which noise occursNoise type
Noise increases when the accelerator pedal is depressed, but stops when
the engine is stopped.Generator noise
Noise occurs during A/C or the heater operation.Blower motor noise
Noise occurs when the vehicle accelerates rapidly on an unpaved road or
after the ignition switch is turned on.Fuel pump noise
Noise occurs when the horn switch is pressed and released or when pressed
and held.Horn noise
Quiet noise occurs while the engine is running, but stops when the engine is
stopped.Ignition noise
Noise occurs synchronously with the blink of the turn signal.Flasher noise
Noise occurs during window washer operation.Washer noise
Noise occurs while the engine is running, and it continues even after the en-
gine is stopped.Water temperature sensor noise
Noise occurs during wiper operation.Wiper noise
Noise occurs when the brake pedal is depressed.Stop light switch noise
Others.Static electricity stored on the vehicle
HINT:

Identify the condition under which the noise occurs, and check the noise filter on the related part.

First ensure that the noise is not coming from the outside. Failure to do so makes noise source detec-
tion difficult and may lead to a misdiagnosis.

Noise should be removed in descending order of loudness.
NG Install it properly.
OK
Identification of noise source (See page DI±1964).
DIDA3±01

DI±2188
± DIAGNOSTICSNAVIGATION SYSTEM
2382 Author: Date:
2005 SEQUOIA (RM1146U) SW2 (R27±8) ± SWG (R27±6)
GR±R ± BR±WSteering pad switch signalSteering pad switch not operated
"MODE switch pushed4 V or more
"Below 2.5 V
SPD (R29±3) ± GND (R30±20)G±O ± BRSpeed signal from com-
bination meterSee ºVehicle Signal Check Modeº
(See page DI±2179)±
REV (R29±5) ± GND (R30±20)B±Y ± BRReverse signal from com-
bination meterSee ºVehicle Signal Check Modeº
(See page DI±2179)±
MUTE (R28±7) ±
GND (R30±20)R±W ± BRMUTE signal
(From navigation)Audio system is playing " chang-
ing modeAbove 3.5 V "
Below 1 V
SLD (R30±10) ± Body groundShielded ±
Body groundShield groundAlwaysBelow 1 V
SWG (R27±6) ± Body groundBR±W ±
Body groundSteering pad switch
groundAlwaysBelow 1 V
ATX+ (R30±5) ± GND (R30±20)V ± BRAVC±LAN
communication signalIgnition switch ON2 to 3 V
ATX± (R30±15) ±
GND (R30±20)P ± BRAVC±LAN
communication signalIgnition switch ON2 to 3 V
IVO+ (R27±11) ±
GND (R30±20)W ± BRVoice guidance output
signalNavigation system is voice guid-
ance outputA waveform synchro-
nized with sound is out-
put
IVO± (R27±12) ±
GND (R30±20)B ± BRVoice guidance output
signalNavigation system is voice guid-
ance outputA waveform synchro-
nized with sound is out-
put
SLD1 (R27±13) ± Body groundShielded ±
Body groundShield groundAlwaysBelow 1 V
PKB (R29±1) ± GND (R30±20)LG±R ± BRParking brake switch sig-
nalParking brake pedal is depress "Below 1 V "
10 to 14 V
(*1) NTSC (R26±1) ±
GND (R30±20)R ± BRDisplay signal (From mul-
ti±display controller)Navigation display is ONPulse generation
(*1) SGD1 (R26±4) ±
Body groundG ± Body groundGroundAlwaysBelow 1 V
(*1) SGND (R26±5) ±
Body groundShielded ±
Body groundShield groundAlwaysBelow 1 V
(*1, 2) TX+ (R27±9) ±
GND (R30±20)L ± BRAVC±LAN
communication signalIgnition switch ON2 to 3 V
(*1, 2) TX± (R27±10) ±
GND (R30±20)LG ± BRAVC±LAN
communication signalIgnition switch ON2 to 3 V
(*1, 2) R±R+ (R27±15) ±
GND (R30±20)W ± BRSound signal
(Right output)Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*1, 2) R±R± (R27±16) ±
GND (R30±20)G ± BRSound signal
(Right output)Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*1, 2) R±L+ (R27±17) ±
GND (R30±20)B ± BRSound signal (Left output)Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*1, 2) R±L± (R27±18) ±
GND (R30±20)R ± BRSound signal (Left output)Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*1) RSLD (R27±14) ±
Body groundShielded ±
Body groundShield groundAlwaysBelow 1 V
(*1, 2) RMUT (R27±19) ±
GND (R30±20)R±W ± BRMUTE signal (To multi±
display controller)Audio system is playing " chang-
ing modeAbove 3.5 V "
Below 1 V
(*1) CDR+ (R28±2) ±
GND (R30±20)W ± BRSound signal (Right input)Rear seat entertainment system is
playingA waveform synchro-
nized with sound is out-
put

I28240
*1
*2
*3
*4
*5*6
I28226PKB OFF
REV OFFSPEED 49km/h
TAIL OFFI28974
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2195
2389 Author: Date:
2005 SEQUOIA (RM1146U)
(4) LAN Monitor (Individual) Screen
Screen Description
DisplayContents
Device name/*1Target device
Segment/*2Target logical address
DTC/*3DTC (Diagnostic Trouble Code)
Sub±Code (device address)/*4Physical address stored with DTC (If there is no address, nothing is displayed.).
Connection check No./*5Connection check number stored with DTC.
DTC occurrence/*6Number of times the same DTC has been recorded.
(b) DISPLAY CHECK
(1) Vehicle Signal Check Mode Screen
Screen Description
NameContents
PKBParking brake ON/OFF state is displayed.
REVReverse signal ON/OFF state is displayed.
SPEEDVehicle speed is displayed in km/h.
TAILTAIL signal (Head lamp dimmer switch) ON/OFF state is displayed.
HINT:

Only items sending a vehicle signal will be displayed.

This screen is updated once per second when input signals to the vehicle are changed.

± DIAGNOSTICSNAVIGATION SYSTEM
DI±2233
2427 Author: Date:
2005 SEQUOIA (RM1146U)
Abnormal noise occurs
INSPECTION PROCEDURE
1 Check speaker installation
CHECK:
Check if each speaker is securely installed.
OK:
Each speaker is securely installed.
HINT:
The radio is equipped with a noise prevention system that blocks only excessively loud noise. If loud noise
occurs, check that all wiring is proper and that the antenna installation part ground and noise±prevention
equipment are installed.
Conditions under which noise occursNoise type
Noise increases when the accelerator pedal is depressed, but stops when
the engine is stopped.Generator noise
Noise occurs during A/C or heater operation.Blower motor noise
Noise occurs when the vehicle accelerates rapidly on an unpaved road or
after the ignition switch is turned on.Fuel pump noise
Noise occurs when the horn switch is pressed and released or when pressed
and held.Horn noise
Quiet noise is occurs while the engine is running, but stops when the engine
is stopped.Ignition noise
Noise occurs synchronously with the blink of the turn signal.Flasher noise
Noise occurs during window washer operation.Washer noise
Noise occurs while the engine is running, and continues even after the engine
is stopped.Water temperature sensor noise
Noise occurs during wiper operation.Wiper noise
Noise occurs when the brake pedal is depressed.Stop light switch noise
Others.Static electricity stored on the vehicle
HINT:

Identify the condition under which the noise occurs, and check the noise filter on the relevant part.

First ensure that the noise is not coming from outside. Failure to do so makes noise source detection
difficult and may lead to a misdiagnosis.

Noise should be removed in descending order of loudness.
NG Install it properly.
OK
Identification of noise source (See page DI±2174).
DIDCO±01

EM±2
± ENGINE MECHANICALCO/HC
2581 Author: Date:
2005 SEQUOIA (RM1146U)
5. IMMEDIATELY CHECK CO/HC CONCENTRATION AT
IDLE AND/OR 2,500 RPM
HINT:
When performing the 2 mode (2,500 rpm and idle) test, follow
the measurement orders are prescribed by the applicable local
regulations.
If the CO/HC concentration does not comply with regulations,
perform troubleshooting in the order given below.
(a) Check the air±fuel ratio sensors and heated oxygen sen-
sors operation.(See page DI±88 and DI±93)
(b) See the table below for possible causes, and then inspect
and correct the applicable causes if necessary.
COHCProblemsCauses
NormalHighRough idle7. Faulty ignitions:

Incorrect timing

Fouled, shorted or improperly gapped plugs
8. Incorrect valve clearance
9. Leaky intake and exhaust valves
10.Leaky cylinders
LowHighRough idle
(fluctuating HC reading)1. Vacuum leaks:

PCV hoses

Intake manifold

Throttle body

Brake booster line
2. Lean mixture causing misfire
HighHighRough idle
(Black smoke from exhaust)1. Restricted air filter
2. Faulty SFI systems:

Faulty pressure regulator

Defective ECT sensor

Faulty ECM

Faulty injectors

Faulty throttle position sensor

Faulty MAF meter

A23324
(a)
(b)
(c)
(d)
EM±74
± ENGINE MECHANICALCYLINDER HEAD
2653 Author: Date:
2005 SEQUOIA (RM1146U)
26. CONNECT HOSES TO INTAKE MANIFOLD
(a) Connect the vacuum hose to the fuel pressure regulator.
(b) Connect the PCV hose to the PCV valve on the LH the cyl-
inder head.
(c) Connect the EVAP hose (from charcoal canister) to the
VSV for EVAP.
(d) Connect the 2 vacuum hoses to the VSV for the air injec-
tion system.
(e) Connect the brake booster tube.
27. CONNECT CONNECTORS TO INTAKE MANIFOLD
(a) Connect the throttle control connector.
(b) Connect the 2 VSV connectors for the air injection sys-
tem.
(c) Connect the VSV connector for the EVAP.
(d) Connect the 8 injector connectors.
(e) Connect the ECT sensor connector.
(f) Connect the 2 air fuel ratio sensor connectors.
28. CONNECT FUEL INLET HOSE (See page SF±31) AND
FUEL RETURN HOSE
29. INSTALL TIMING BELT REAR PLATES
(a) Install the RH No.1 timing belt rear plates.
Install the RH No.1 timing belt rear plates to the cylinder
head with the 3 bolts and stud bolt.
Torque: 7.5 N´m (76 kgf´cm, 66 in.´lbf)
(b) Install the LH No.1 timing belt rear plates.
(1) Connect the wire clamp to the No.1 timing belt rear
plate.
(2) Install the LH No.1 timing belt rear plates to the cyl-
inder head with the 3 bolts and stud bolt.
Torque: 7.5 N´m (76 kgf´cm, 66 in.´lbf)
30. INSTALL THROTTLE BODY COVER
31. INSTALL IGNITION COILS (See page IG±6)
32. INSTALL OIL DIPSTICK AND GUIDE FOR A/T
33. INSTALL FRONT EXHAUST PIPE (See page EM±126)
34. INSTALL PS PUMP (See page EM±83)
35. INSTALL CAMSHAFT POSITION SENSOR
(See page IG±9)
36. INSTALL CAMSHAFT TIMING PULLEYS
(See page EM±23)
37. CONNECT TIMING BELT TO CAMSHAFT TIMING PUL-
LEYS (See page EM±23)
38. CHECK ENGINE OIL LEVEL

A08928
ECM Connector ECM and Bracket AssemblyHeater to Register Dust
Lower No.2 Finish Panel
Glove Compartment Door
Wire Harness Connector (Cassette Connector)
A23366
Engine Wire Clamp
Engine WireHeater Hose Ground Strap
Fuel Inlet
HoseBattery
Negative
(±) Cable Heater Hose
Fuel Return
Hose
Generator Wire
Battery
Positive (+)
Terminal Clamp
Generator
Connector
EVAP Hose
w/o Hydraulic Brake Booster:
Brake Booster Tube
EM±76
± ENGINE MECHANICALENGINE UNIT (2WD)
2655 Author: Date:
2005 SEQUOIA (RM1146U)