2001 TOYOTA SEQUOIA wheel

± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±883
1077 Author: Date:
2005 SEQUOIA (RM1146U)
6 Using hand±held tester, check the tire pressure data of each wheel.
NEXT
7 Is there a wheel whose tire pressure newly becomes 120 kPa (1.2 kgf/cm2, 17
psi)?
No The detected DTC is for the front left wheel
transmitter.
Ye s
8 Rapidly reduce the pressure of rear right wheel to 120 kPa (1.2 kgf/cm2, 17 psi).
NEXT
9 Using hand±held tester, check the tire pressure data of each wheel.
NEXT
10 Is there a wheel whose tire pressure newly becomes 120 kPa (1.2 kgf/cm2, 17
psi)?
No The detected DTC is for the rear right wheel
transmitter.
Ye s
11 Rapidly reduce the pressure of rear left wheel to 120 kPa (1.2 kgf/cm2, 17 psi).
NEXT

DI±884
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1078 Author: Date:
2005 SEQUOIA (RM1146U)
12 Using hand±held tester, check the tire pressure data of each wheel.
NEXT
13 Is there a wheel whose tire pressure newly becomes 120 kPa (1.2 kgf/cm2, 17
psi)?
No The detected DTC is for the rear left wheel trans-
mitter.
Ye s
The detected DTC is for the spare tire transmitter.

± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±885
1079 Author: Date:
2005 SEQUOIA (RM1146U)
Identify transmitter (Error in past)
HINT:

Refer to IDENTIFY TRANSMITTER (ERROR IN PRESENT) if the DTC is output currently. Refer to
IDENTIFY TRANSMITTER (ERROR IN PAST) if a previously output DTC is not output now. Even when
DTCs C2165/65 to C2169/69 are output both as present and past codes, refer to IDENTIFY TRANS-
MITTER (ERROR IN PAST).

DTCs relevant to the transmitters are corresponding to each transmitter ID. It is impossible to identify
which tire is malfunctioning according to each transmitter ID. Therefore the following procedures must
be followed to confirm the ID No. and tire location.

The following are the procedures to identify which wheel's transmitter ID1 is resulting from when as-
suming that either of the DTCs C2141/41 (Transmitter ID1 error) or C2165/65 (Abnormal temperature
inside ID1 tire) is detected. Identify the corresponding transmitter using the same procedures when
DTCs C2142/42 to C2145/45, C2166/66 to C2169/69 are detected.
IDENTIFICATION PROCEDURE
1 Set the pressure of all tires to the specified value.
Tire sizeFrontRearSpare
P245 / 70 R 16220 kPa (2.2 kgf/cm2, 32 psi)240 kPa (2.4 kgf/cm2, 35 psi)240 kPa (2.4 kgf/cm2, 35 psi)
P265 / 70 R 16220 kPa (2.2 kgf/cm2, 32 psi)220 kPa (2.2 kgf/cm2, 32 psi)220 kPa (2.2 kgf/cm2, 32 psi)
P265 / 65 R 17220 kPa (2.2 kgf/cm2, 32 psi)220 kPa (2.2 kgf/cm2, 32 psi)220 kPa (2.2 kgf/cm2, 32 psi)
NEXT
2 Rapidly reduce the pressure of front right wheel to 120 kPa (1.2 kgf/cm2, 17 psi).
NEXT
3 Using hand±held tester, check the ID1 tire pressure data.
NEXT
4 Is ID1 tire pressure 120 kPa (1.2 kgf/cm2, 17 psi)?
Yes The ID1 is for the front right wheel transmitter.
No
DIDKJ±01

DI±886
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1080 Author: Date:
2005 SEQUOIA (RM1146U)
5 Rapidly reduce the pressure of front left wheel to 120 kPa (1.2 kgf/cm2, 17 psi).
NEXT
6 Using hand±held tester, check the ID1 tire pressure data.
NEXT
7 Is ID1 tire pressure 120 kPa (1.2 kgf/cm2, 17 psi)?
Yes The ID1 is for the front left wheel transmitter.
No
8 Rapidly reduce the pressure of rear right wheel to 120 kPa (1.2 kgf/cm2, 17 psi).
NEXT
9 Using hand±held tester, check the ID1 tire pressure data.
NEXT
10 Is ID1 tire pressure 120 kPa (1.2 kgf/cm2, 17 psi)?
Yes The ID1 is for the rear right wheel transmitter.
No

± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±887
1081 Author: Date:
2005 SEQUOIA (RM1146U)
11 Rapidly reduce the pressure of rear left wheel to 120 kPa (1.2 kgf/cm2, 17 psi).
NEXT
12 Using hand±held tester, check the ID1 tire pressure data.
NEXT
13 Is ID1 tire pressure 120 kPa (1.2 kgf/cm2, 17 psi)?
Yes The ID1 is for the rear left wheel transmitter.
No
The ID1 is for the spare tire transmitter.

DIDLW±01
F19153
Speed Sensor
(Each Wheel)
Stop Lamp Switch
Parking Brake Switch
Delta S Sensor
Yaw Rate
(Deceleration) SensorABS & VSC Actuator
Skid Control
ECUCombination
Meter
Translate
ECUSteering Angle
Sensor
4WD ECU
ECM
CAN Communication SystemAir Suspension ECU (*1): CAN1 Circuit
(*2): CAN2 Circuit
(*3): Vehicle CAN Circuit(*2)
(*3) (*1)
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±893
1087 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DIAGRAM

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.

DI93A±03
Inspector 's
Name:
Customer 's Name
Date Vehicle
Brought InRegistration DateRegistration No.
Frame No.
Odometer Reading/ /
/ /
Date Problem First Occurred
Frequency Problem Occurs/ /
ContinuousIntermittent ( times a day)
Remains ONDoes not Light Up
DTC Check1st Time
2nd TimeNormal System Code
Trouble Code (Code )
Symptomskm
miles
Check ItemNormal
ABS does not operate.
ABS does not operate efficiently.
Does not Light Up
ABS & BA & TRAC & VSC Check Sheet
VSC does not operate. (Wheels sideslip when turning sharply.)
ABS Warning Light
Abnormal
Remains ON
Does not Light Up
Remains ONDoes not Light Up
Remains ONDoes not Light Up
Remains ONDoes not Light Up
TRAC OFF Indicator
Light Abnormal*1
SLIP Indicator
Light Abnormal VSC TRAC Warning
Light Abnormal
BRAKE Warning
Light Abnormal
Malfunction
Indicator Light
TRAC does not operate. (Wheels spin when starting off rapidly.)
Remains ON
Does not Light UpVSC OFF Indicator
Light Abnormal*2
BA does not operate
Normal System Code
Trouble Code (Code )
DI±896
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1090 Author: Date:
2005 SEQUOIA (RM1146U)
CUSTOMER PROBLEM ANALYSIS CHECK
*1: Only for 2WD
*2: Only for 4WD