AUX TOYOTA SEQUOIA 2001 Service Repair Manual

IN04Q±33
IN±40
± INTRODUCTIONTERMS
40 Author: Date:
2005 SEQUOIA (RM1146U)
TERMS
ABBREVIATIONS USED IN THIS MANUAL
AbbreviationsMeaning
ABSAnti±Lock Brake System
A/CAir Conditioner
ACAlternating Current
ACCAccessory
ACISAcoustic Control Induction System
ACMActive Control Engine Mount
ACSDAutomatic Cold Start Device
A.D.D.Automatic Disconnecting Differential
A/FAir±Fuel Ratio
AHCActive Height Control Suspension
ALRAutomatic Locking Retractor
ALTAlternator
AMPAmplifier
ANTAntenna
APPROX.Approximately
ASSYAssembly
A/T, ATMAutomatic Transmission (Transaxle)
AT FAutomatic Transmission Fluid
AUTOAutomatic
AUXAuxiliary
AV GAverage
AV SAdaptive Variable Suspension
B+Battery Voltage
BABrake Assist
BACSBoost Altitude Compensation System
BATBattery
BDCBottom Dead Center
B/LBi±Level
B/SBore±Stroke Ratio
BTDCBefore Top Dead Center
BVSVBimetallic Vacuum Switching Valve
CBCircuit Breaker
CCoCatalytic Converter For Oxidation
CCVCanister Closed Valve
CDCompact Disc
CFCornering Force
CGCenter Of Gravity
CHChannel
CKDComplete Knock Down
COMB.Combination
CPECoupe
CPSCombustion Pressure Sensor
CPUCentral Processing Unit
CRSChild Restraint System
CTRCenter
C/VCheck Valve
CVControl Valve
CWCurb Weight

B02100
± MAINTENANCECHASSIS
MA±11
58 Author: Date:
2005 SEQUOIA (RM1146U)

Leaf spring U±bolt mounting nuts
Torque: 133 N´m (1,350 kgf´cm, 98 ft´lbf )
(b) Under Severe Conditions:
In addition to the above maintenance items, check for
loose or missing bolts and nuts on the following.

Steering system

Drive train

Suspension system

Fuel tank mounts

Engine mounts, etc.
14. FINAL INSPECTION
(a) Check operation of body parts:

Hood:

Auxiliary catch operates properly

Hood locks securely when closed

Doors:

Door locks operate properly

Doors close properly

Seats:

Seat adjusts easily and locks securely in any
positions

Seat backs lock securely at any angle

Fold±down seat backs lock securely
(b) Road test:

Engine and chassis parts do not have abnormal
noises.

Vehicle does not wander or pull to one side.

Brakes work properly and do not drag.
(c) Be sure to deliver a clean vehicle and especially check:

Steering wheel

Shift lever knob

All switch knobs

Door handles

Seats

DIDLX±01
DI±894
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1088 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DESCRIPTION
1. SYSTEM DESCRIPTION
HINT:

The yaw rate sensor and deceleration sensor are combined and in a single unit. This unit communi-
cates with the skid control ECU through the CAN communication system.

No changes have been made to the communication method between the VSC system and ECM. How-
ever, the communication method between the Translate ECU and ECM has been changed from serial
to CAN communication.
(a) ABS
(Anti±lock Brake System)
The ABS helps prevent the wheels from locking when the brakes are applied firmly or when braking
on a slippery surface.
(b) EBD
(Electronic Brake force Distribution)
The EBD control utilizes ABS, realizing proper brake force distribution between front and rear wheels
in accordance with driving conditions.
In addition, during braking while cornering, it also controls the brake forces of the right and left wheels,
helping to maintain vehicle behavior.
(c) BA (Brake Assist)
The primary purpose of the brake assist system is to provide an auxiliary brake force to assist the driver
who cannot generate a large enough brake force during emergency braking, thus helping to maximize
the vehicle's braking performance.
(d) TRAC
(Traction Control)
The TRAC system helps prevent the drive wheels from slipping if the driver presses down on the accel-
erator pedal excessively when starting off or accelerating on a slippery surface.
(e) VSC
(Vehicle Stability Control)
The VSC system helps prevent the vehicle from slipping sideways as a result of strong front wheel skid
or strong rear wheel skid during cornering.
2. ABS with EBD & BA & TRAC & VSC OPERATION
(a) The skid control ECU calculates vehicle stability tendency based on signals from the speed sensor,
yaw rate (deceleration) sensor and steering angle sensor. In addition, it evaluates the results of the
calculations to determine whether any control actions (control of the engine output torque by electronic
throttle control and of the wheel brake pressure by the brake actuator) should be implemented.
(b) The SLIP indicator blinks and the VSC buzzer sounds to inform the driver that the VSC system is oper-
ating. The SLIP indicator also blinks when TRAC is operating, and the operation being performed is
displayed.
3. FAIL SAFE FUNCTION
(a) When a failure occurs in the ABS & BA & TRAC & VSC systems, the ABS and VSC warning lights come
on and ABS & BA & TRAC & VSC operations are prohibited. In addition to this, when there is a failure
that disables EBD operation, the brake warning light also comes on and EBD operation is prohibited.
(b) If some control is prohibited due to a malfunction during its operation, that control will be cut off gradual-
ly not to change the stability of the vehicle suddenly.

DID8Y±01
DI±1628
± DIAGNOSTICSCOMBINATION METER SYSTEM
1822 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT INSPECTION
Entire combination meter does not operate
CIRCUIT DESCRIPTION
This is the power source circuit of the combination meter.
The combination meter uses BEAN to determine that the ignition switch is in the ACC position or not.
The ST terminal (C5±3) is used as an auxiliary power source to prevent voltage drop when the ignition switch
is ON. When the ST terminal circuit is open or shorted, the combination meter illumination may flicker when
cranking the engine.

± DIAGNOSTICSAUDIO SYSTEM
DI±1981
2175 Author: Date:
2005 SEQUOIA (RM1146U)DB
*1
Mode Status ErrorDual alarm is detected.
1. Power source circuit (Stereo
component amplifier assy).
2. Power source circuit (Rear seat
audio controller). *6
3. Power source circuit (Multi±dis-
play controller sub±assy) *7
4. AVC±LAN circuit (Radio receiver
assy ± Stereo component ampli-
fier assy).
5. AVC±LAN (Radio receiver assy
± Rear seat audio controller). *6
6. AVC±LAN (Radio receiver assy
± Multi±display controller sub±
assy). *7
7. Replace stereo component am-
plifier assy.
8. Replace rear seat audio control-
ler. *6
9. Replace multi±display controller
sub±assy. *7DI±1993
DI±2058
DI±2110
DI±2023
DI±2061
DI±2139
±
±
±
DC
*3Transmission Error
Transmission to component shown by auxiliary
code has been failed.
(Detecting this DTC does not necessarily mean
actual failure.)
1. Power source circuit (Rear seat
audio controller). *6
2. Power source circuit (Multi±dis-
play controller sub±assy) *7
3. AVC±LAN circuit (Radio receiver
assy ± Stereo component ampli-
fier assy).
4. AVC±LAN (Radio receiver assy
± Rear seat audio controller). *6
5. AVC±LAN (Radio receiver assy
± Multi±display controller sub±
assy). *7
6. Replace stereo component am-
plifier assy.
7. Replace rear seat audio control-
ler. *6
8. Replace multi±display controller
sub±assy. *7DI±2058
DI±2110
DI±2023
DI±2061
DI±2139
±
±
±
DD
*4Master Reset (Momentary Inter-
ruption)After the engine was started, master component
was disconnected from system.
1. Power source circuit (Stereo
component amplifier assy).
2. Power source circuit (Rear seat
audio controller). *6
3. Power source circuit (Multi±dis-
play controller sub±assy) *7
4. AVC±LAN circuit (Radio receiver
assy ± Stereo component ampli-
fier assy).
5. AVC±LAN (Radio receiver assy
± Rear seat audio controller). *6
6. AVC±LAN (Radio receiver assy
± Multi±display controller sub±
assy). *7
7. Replace stereo component am-
plifier assy.
8. Replace rear seat audio control-
ler. *6
9. Replace multi±display controller
sub±assy. *7DI±1993
DI±2058
DI±2110
DI±2023
DI±2061
DI±2139
±
±
±

DI±1984
± DIAGNOSTICSAUDIO SYSTEM
2178 Author: Date:
2005 SEQUOIA (RM1146U)
2. Stereo component amplifier assy (physical address: 440) [DSP±AMP]
Logical address: 01 (Communication control)
DTCNameDiagnosisVerificationSee page
D6
*1Absence of Master
Component in which this code is recorded was
disconnected from system with ignition in ACC or
ON. Either that, or radio receiver assy was dis-
connected when this code was recorded.
1. Power source circuit (Radio re-
ceiver assy).
2. Power source circuit (Stereo
component amplifier assy).
3. AVC±LAN circuit (Radio receiver
assy ± Stereo component ampli-
fier assy).
4. AVC±LAN (Radio receiver assy
± Rear seat audio controller). *5
5. AVC±LAN (Radio receiver assy
± Multi±display controller sub±
assy). *6
6. Replace radio receiver assy.
7. Replace stereo component am-
plifier assy.DI±1990
DI±1993
DI±2023
DI±2061
DI±2139
±
±
D7Communication Check Error
Component in which this code is recorded is or
was disconnected from system after engine start.
Either that, or radio receiver assy was discon-
nected when this code was recorded.
1. Power source circuit (Radio re-
ceiver assy).
2. Power source circuit (Stereo
component amplifier assy).
3. AVC±LAN circuit (Radio receiver
assy ± Stereo component ampli-
fier assy).
4. AVC±LAN (Radio receiver assy
± Rear seat audio controller). *5
5. AVC±LAN (Radio receiver assy
± Multi±display controller sub±
assy). *6
6. Replace radio receiver assy.
7. Replace stereo component am-
plifier assy.DI±1990
DI±1993
DI±2023
DI±2061
DI±2139
±
±
DC
*2Transmission Error
Transmission to component shown by auxiliary
code failed.
(Detecting this DTC does not necessarily mean
actual failure.)If same auxiliary code is recorded in
other components, check harness
for power supply and communica-
tion system of all components
shown by code.
±
DD
*3Master Reset (Momentary Inter-
ruption)After engine was started, radio receiver assy was
disconnected from system.
1. Power source circuit (Radio re-
ceiver assy).
2. Power source circuit (Stereo
component amplifier assy).
3. AVC±LAN circuit (Radio receiver
assy ± Stereo component ampli-
fier assy).
4. AVC±LAN (Radio receiver assy
± Rear seat audio controller). *5
5. AVC±LAN (Radio receiver assy
± Multi±display controller sub±
assy). *6
6. Replace radio receiver assy.
7. Replace stereo component am-
plifier assy.DI±1990
DI±1993
DI±2023
DI±2061
DI±2139
±
±

DI±2092
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2286 Author: Date:
2005 SEQUOIA (RM1146U)ACC3 ± GND
(R22±12 ± R23±29)
LG ± YIgnition (ACC)Ignition switch in the ACC position10 to 14 V
TX3± ± GND
(R22±13 ± R23±29)LG ± YAVC±LAN
communication signalIgnition switch ACC2 to 3 V
TX3+ ± GND
(R22±14 ± R23±29)LG ± YAVC±LAN
communication signalIgnition switch ACC2 to 3 V
GND4 ± Body ground
(R22±15 ± Body ground)LG ± Body groundGroundAlwaysBelow 1 V
HPL± ± GND
(R22±16 ± R23±29)W ± YSound signal (Output)RSE system is playing
A waveform
synchronized
with sound is
output
HPL+ ± GND
(R22±17 ± R23±29)W ± YSound signal (Output)RSE system is playing
A waveform
synchronized
with sound is
output
HPR± ± GND
(R22±18 ± R23±29)W ± YSound signal (Output)RSE system is playing
A waveform
synchronized
with sound is
output
HPR+ ± GND
(R22±19 ± R23±29)W ± YSound signal (Output)RSE system is playing
A waveform
synchronized
with sound is
output
SLD1 ± Body ground
(R22±20 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
+B2 ± GND
(R21±1 ± R23±29)Y ± YBatteryAlways10 to 14 V
ACC2 ± GND
(R21±2 ± R23±29)LG ± YIgnition (ACC)Ignition switch in the ACC position10 to 14 V
GAUX ± GND
(R21±3 ± R23±29)LG ± YGroundExternal device system is playing
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output
TX2± ± GND
(R21±4 ± R23±29)LG ± YAVC±LAN
communication signalIgnition switch ACC2 to 3 V
TX2+ ± GND
(R21±5 ± R23±29)LG ± YAVC±LAN
communication signalIgnition switch ACC2 to 3 V
GND1 ± Body ground
(R21±6 ± Body ground)Y ± Body groundGroundAlwaysBelow 1 V
SG5 ± Body ground
(R21±7 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
HP1L ± GND
(R21±8 ± R23±29)BR ± YSound signal (Input)External device system is playing
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output
HP1R ± GND
(R21±9 ± R23±29)BR ± YSound signal (Input)External device system is playing
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output
SG7 ± Body ground
(R21±10 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
AUXL ± GND
(R21±11 ± R23±29)BR ± YSound signalExternal device system is playing
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output

I28286
R25
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2093
2287 Author: Date:
2005 SEQUOIA (RM1146U)AUXR ± GND
(R21±12 ± R23±29)
BR ± YSound signalExternal device system is playing
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output
R2 ± GND
(R21±13 ± R23±29)B ± YDisplay signal (Red)Display is on
(Television display assy)Pulse genera-
tion
G2 ± GND
(R21±14 ± R23±29)B ± YDisplay signal (Green)Display is on
(Television display assy)Pulse genera-
tion
B2 ± GND
(R21±15 ± R23±29)B ± YDisplay signal (Blue)Display is on
(Television display assy)Pulse genera-
tion
SYN2 ± GND
(R21±16 ± R23±29)B ± YDisplay signal
(Synchronize)Display is on
(Television display assy)Pulse genera-
tion
VR2 ± Body ground
(R21±17 ± Body ground)B ± Body groundGroundAlwaysBelow 1 V
VG2 ± Body ground
(R21±18 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
SG6 ± Body ground
(R21±19 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
HP2L ± GND
(R21±20 ± R23±29)BR ± YSound signal (Output)Audio system is playing (Head-
phone)
A waveform
synchronized
with sound is
output
HP2R ± GND
(R21±21 ± R23±29)BR ± YSound signal (Output)Audio system is playing (Head-
phone)
A waveform
synchronized
with sound is
output
SG6 ± Body ground
(R21±22 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
SGN5 ± Body ground
(R21±23 ± Body ground)BR ± Body groundGroundAlwaysBelow 1 V
NTS4 ± GND
(R21±24 ± R23±29)BR ± YDisplay signalExternal device system displayed
(At that time of VTR jack use)Pulse genera-
tion
*1: w/ Navigation System
2. TELEVISION DISPLAY ASSY
Symbols (Terminals No.)Wiring ColorTerminal DescriptionConditionSpecification
GND ± Body ground
(R25±1 ± Body ground)Y ± Body groundGroundAlwaysBelow 1 V
SGND ± Body ground
(R25±2 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V

I28322I28621
V10
DI±2096
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2290 Author: Date:
2005 SEQUOIA (RM1146U)HPR ± SGND
(H11±1 ± H11±3)
BR ± ShieldedSound signal (Input)External device system sounding
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output
HPL ± SGND
(H11±2 ± H11±3)BR ± ShieldedSound signal (Input)External device system sounding
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output
SGND ± Body ground
(H11±3 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
5. VTR TERMINAL
Symbols (Terminals No.)Wiring ColorTerminal DescriptionConditionSpecification
AUXR ± GND
(V10±1 ± R23±29)BR ± YExternal audio R input
signalExternal device system sounding
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output
AUXL ± GND
(V10±2 ± R23±29)BR ± YExternal audio L input
signalExternal device system sounding
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output
SG6 ± Body ground
(V10±3 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
CE ± GND
(V10±4 ± R23±29)LG ± YExternal VIDEO input
signalExternal device system sounding
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output
NTS4 ± GND
(V10±5 ± R23±29)BR ± YDisplay signalVTR is displayedPulse genera-
tion
DGND ± Body ground
(V10±6 ± Body ground)BR ± Body groundGroundAlwaysBelow 1 V
SGN5 ± Body ground
(V10±7 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V

I28666
Multi±display
Controller Sub±assy
R2112
R2111
R2110 BR
BR AUXR
AUXL
SG61
2
3
(Shielded) V10
VTR Terminal
AUXR
AUXL
SG7
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2131
2325 Author: Date:
2005 SEQUOIA (RM1146U)
Sound signal circuit (Multi±display controller sub±assy ± VTR ter-
minal)
CIRCUIT DESCRIPTION
This is the sound signal circuit from the VTR terminal to the multi±display controller sub±assy.
WIRING DIAGRAM
DIDBF±01