2001 TOYOTA SEQUOIA wheel

± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±801
995 Author: Date:
2005 SEQUOIA (RM1146U)

When the spare tire is not within the receivable range of the electric wave, a signal may not be
received because spare tires are fixed. Accordingly, the system may not function properly. If
there is a possibility that the TPWS system does not receive a signal from the spare tire, rotate
the tire 90°.
HINT:

If any other wheels than the specified ones are used, the system may not function properly because
the radio waves are differently transmitted from the tire pressure sensor.

Depending on the tire type, the system may not function properly even though the specified wheels
are used.
(c) The average use life of the grommet of the tire pressure monitor valve sub±assy is approximately 5
years, at which time it must be replaced.
(d) After removing and installing the ECU or a sensor, output a diagnosis code and check that it is a normal
code.
3. FUNCTION OF COMPONENTS
ComponentsFunction
Tire pressure monitor valve sub±assy
Combined as a single unit with a disc wheel air valve, it measures tire pressure and
temperature and transmits an ID number for measurement value and identification.
Built±in the battery.
Tire pressure monitor receiver assyReceives and transmits a necessary signal from the transmitter to the tire pressure
monitor ECU.
Tire pressure monitor ECU
Receives the signal from the receiver and identifies it as vehicle's own signal. If the
measurement value is equal to or lower than the specified value, it transmits a sig-
nal so that the air pressure warning lamp on the combination meter comes on.
Tire pressure warning lampLocated in the combination meter, it informs the driver of lowered tire air pressure
and system failure.
Tire pressure warning reset switchEnters the initialization mode for tire or wheel replacement, or tire rotation
4. TIRE PRESSURE WARNING RESET SWITCH

By operating the tire pressure warning reset switch, the tire pressure monitor ECU can be set to issue
a warning at an inflation pressure that corresponds to the type of tires. Therefore, the dealer must set
the warning threshold to the proper value in order to comply with the local regulations.

Operate the tire pressure warning reset switch only after the inflation pressures of all 5 tires (including
the spare) have been adjusted on the vehicle.

To initialize the system, press and hold the tire pressure warning reset switch for 3 seconds or longer
with the ignition switch ON. After the system has been initialized, the warning lamp blinks 3 times (1
second ON, 1 second OFF).

During initialization, the tire pressure monitor valve sub±assy measures the inflation pressure of the
tires, and registers the signals that are transmitted into the tire pressure monitor ECU at a frequency
of one per minute. The initialization process is completed when the signals from the 5 tires have been
received.

The initialization process is canceled if the ignition switch is turned OFF during initialization. To initialize
again, the tire pressure warning reset switch must be pressed again. For this reason, once the tire pres-
sure warning reset switch has been pressed, turning OFF the ignition switch is not recommended for
a minimum of 20 minutes.

DIDJY±01
Inspector 's
Name:
Customer 's Name
Date Vehicle
Brought InProduction DateVIN
Licence Plate No.
Odometer Reading/ /
/ /
Date of First Occurrence
Frequency of Problem Occurrence/ /
Continuous Intermittent ( times a day)
In spite of abnormal low tire pressure, the warning lamp does not
come on.
The warning lamp was lit and the tire was filled up with air, but
the warning lamp does not go off.
Remains ONDoes not come on
Check ItemTire Pressure
Warning LampNormal
Malfunction Code (Code )
Symptomskm
miles
Tire Pressure Warning System Check Sheet
Tire Pressure
Warning Lamp
Abnormal
TireTire Pressure
FR ( ) FL ( ) RR ( ) RL ( )
Tire Size
Tire Type
Tire Wear Condition
History of changing tires or wheels
When ( )
History of rotating tires FR ( ) FL ( ) RR ( ) RL ( )
FR ( ) FL ( ) RR ( ) RL ( )
FR ( ) FL ( ) RR ( ) RL ( )
When ( )
DI±804
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
998 Author: Date:
2005 SEQUOIA (RM1146U)
CUSTOMER PROBLEM ANALYSIS CHECK

DIDJZ±01
F19326
F19327
F19328
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±805
999 Author: Date:
2005 SEQUOIA (RM1146U)
REGISTRATION
1. IN CASE OF TIRE PRESSURE MONITOR ECU REPLACEMENT
(a) Read ID stored in the old ECU using the hand±held tester.
2. IN CASE OF TIRE PRESSURE MONITOR VALVE SUB±ASSY AND/OR TIRE PRESSURE MON-
ITOR ECU REPLACEMENT
(a) Read ID written on the tire pressure monitor valve.
3. REGISTER TRANSMITTER ID
NOTICE:
It is necessary to register the transmitter ID in the tire pressure monitor ECU when replacing the tire
pressure monitor valve sub±assy and/or tire pressure monitor ECU.
(a) Set the tire pressure of all wheels 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)
(b) Connect the hand±held tester to DLC3.
(c) Turn the ignition switch to the ON position.
(d) Read and write down the ID (ID1 to ID5) by using the
DATA LIST.
(e) Select the REGIST TIRE following the hand±held tester
screen.
(UTILITY ± REGIST TIRE)
(f) Input the ID (ID1 to ID5) using the hand±held tester and
transmit it to the tire pressure monitor ECU.
(g) Set the ID transmission condition to ºSUCCEEDEDº.
HINT:
If the operations of steps (d) to (f) do not complete within 5 min.,
the mode will return to normal operation mode.

± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±807
1001 Author: Date:
2005 SEQUOIA (RM1146U)
4. CONFIRMATION OF TRANSMITTER ID REGISTRATION
(a) Set the tire pressure of all wheels 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)
(b) Connect the hand±held tester to DLC3.
(c) Turn the ignition switch to the ON position.
(d) Select ºSIGNAL CHECKº mode on the hand±held tester (see page DI±810).
(e) Forcibly transmit the transmitter IDs for all wheels.
(1) When rapidly reducing the pressure, remove the valve core (above 20 kPa/15 sec.).
HINT:

The transmitter ID can be transmitted by rapidly reducing the tire air pressure.

When rapidly reducing the pressure, remove the valve core (above 20 kPa/15 secs.).
(2) Perform the steps mentioned above to all tires including the spare tire.
(f) Check that test mode DTCs C2181/81, C2182/82, C2183/83, C2184/84 and C2185/85 are all erased.
HINT:

The transmitter ID registration is complete when the test mode DTCs are erased.

If they haven't been erased, reset the tire pressure to the specified value and rotate the tire 90 to 270
degrees. Then forcibly transmit the transmitter IDs of all wheels. If they are still output, register the
transmitter IDs.
(g) Set the tire pressure of all wheels to the specified value.

DIDK0±01
F19150
Tire Pressure
Warning
Reset Switch
F19143
Tire Pressure Warning Lamp
ON
OFF1 sec.
1 sec. DI±808
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1002 Author: Date:
2005 SEQUOIA (RM1146U)
INITIALIZATION
1. INITIALIZATION
NOTICE:
Initialization is necessary after replacing either the ECU,
tires with different tire pressure or tire pressure monitor
valve sub±assy, after rotating the tires, or when a new ve-
hicle is delivered.
(a) Set the tire air pressure for all wheels, including the spare,
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)
(b) Keep the tire pressure warning reset switch pressed for
3 seconds or more with the ignition switch on.
(c) Check that the tire pressure warning lamp blinks 3 times
(1 second ON, 1 second OFF).
HINT:

Do not turn the ignition switch off during initialization (The
initialization process takes about 20 minutes).

Initialization will be complete if signals are received from
all the wheels including the spare. Initialization will be
canceled if the ignition switch is turned off during initializa-
tion.

DI±828
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1022 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
NOTICE:
It is necessary to register an ID code after replacing the tire pressure monitor valve sub±assy and/or
the tire pressure monitor ECU (see page DI±805).
HINT:
Set the tire pressure to the specified value.
1 Forcibly transmit transmitter ID of all wheels.
PREPARATION:
Remove the valve cores of the all wheels to rapidly reduce the pressure of all tires to 120 kPa (1.2 kgf/cm2,
17 psi respectively).
HINT:
The transmitter ID can be transmitted forcibly by rapidly reducing tire air pressure.
NEXT
2 Check DTC (See page DI±820).
CHECK:
Check for a DTC.
OK:
DTC is not output.
OK Set tire pressure to normal value (Transmitter
stop condition is completely reset).
NG
3 Set tire pressure to normal value.
PREPARATION:
Set the tire pressure back to the specified normal 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

F19140
Example:
Front
A
B
DI±832
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1026 Author: Date:
2005 SEQUOIA (RM1146U)
12 Set tire pressure to normal value.
PREPARATION:
Set the tire pressure of all wheels 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
13 Identify transmitter corresponding to DTC (See page DI±881).
NEXT
14 Interchange tires.
PREPARATION:
Interchange tire ºAº with a defective tire pressure monitor valve
sub±assy with tire ºBº with a normal one.
HINT:
If tire ºAº (left front) is identified in step 13.
NEXT
15 Set tire pressure to normal value.
PREPARATION:
Set the tire pressure of all wheels 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

± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±839
1033 Author: Date:
2005 SEQUOIA (RM1146U)
9 Replace tire pressure monitor ECU and check DTC.
PREPARATION:
(a) Replace the tire pressure monitor ECU (see page SA±20).
(b) Clear the DTCs.
CHECK:
Check for a DTC.
OK:
DTC is not output.
NG Replace tire pressure monitor valve sub±assy
(See page SA±16).
OK
End
10 Set tire pressure to normal value.
PREPARATION:
Set the tire pressure of all wheels 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
11 Identify transmitter corresponding to DTC (See page DI±881).
NEXT