Page 1009 of 4323

± 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.
Page 1010 of 4323

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.
Page 1011 of 4323
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±809
1003 Author: Date:
2005 SEQUOIA (RM1146U)
(d) Confirm that initialization is complete using the hand±
held tester.
(e) Check that the pressure for each tire is displayed in INIT
THRESHOLD 1 to 5.
(f) Initialization is complete.
Page 1012 of 4323
DIDKL±01
D05981DLC3
Hand±Held
Tester
F19915
DI±810
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1004 Author: Date:
2005 SEQUOIA (RM1146U)
TEST MODE PROCEDURE
1. ENTER TEST MODE
HINT:
Operation of the tire pressure warning reset switch can be
checked in TEST MODE.
During TEST MODE, the system is not initialized by push-
ing the tire pressure warning reset switch. The circuit of
the tire pressure warning reset switch can be inspected
during this mode.
(a) Make sure that the ignition switch is off.
(b) Connect the hand±held tester to DLC3.
(c) Turn the ignition switch to the ON position.
(d) Select the TEST MODE on hand±held tester.
(e) Perform tire pressure warning reset switch test.
(1) Push the tire pressure warning reset switch.
(2) Check the tire pressure warning indicator lamp.
Test SignalNormal Condition
Tire Pressure Warning Reset SwitchSwitch ON: TPWS indicator come on
Switch OFF: TPWS indicator blinking
Page 1013 of 4323
D05981DLC3
Hand±Held
Tester
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±811
1005 Author: Date:
2005 SEQUOIA (RM1146U)
2. PERFORM SIGNAL CHECK
HINT:
When entering signal check, the tire pressure monitor
ECU sets all the signal check DTCs first.
After completing signal check for each inspection item,
the DTCs that are determined normal by the tire pressure
monitor ECU will be erased.
The DTCs for other inspection items may not be erased
when only a certain signal is inspected.
When signal check returns back to normal mode, all the
signal check DTCs will be erased.
(a) Make sure that the ignition switch is off.
(b) Connect the hand±held tester to DLC3.
(c) Turn the ignition switch to the ON position.
(d) Select the SIGNAL CHECK on hand±held tester.
Page 1014 of 4323

F19181
DI±812
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1006 Author: Date:
2005 SEQUOIA (RM1146U)
(e) Drive the vehicle at 12mph (20 km/h) or more for 10 se-
conds or more.
(f) Loosen the valve core and rapidly reducing the pressure
(20 kPa above/15 sec.).
HINT:
The transmitter ID can be transmitted by rapidly reducing the
tire air pressure.
(g) Check that the tire pressure warning system test mode
DTCs are erased.
SIGNAL
CHECK DTCTest SignalSignal Check DTC Clear Condition
C2181C2185Transmitter DataReceive DATA from the transmitter which has a registered ID
in TPWS ECU
C2191Vehicle Speed SignalVehicle speed of 12 mph (20 km/h) or more is detected for 3
seconds or more
(h) Result
HINT:
After the signal check is complete, check for a DTC and signal check DTC to confirm the system status.
SIGNAL CHECK DTC is outputRepair the faulty part and enter SIGNAL CHECK again
SIGNAL CHECK DTCs are clearedNo problem
(i) End of SIGNAL CHECK
After completing test mode (SIGNAL CHECK), turn the ignition switch OFF and disconnect the tester.
Page 1015 of 4323

± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±813
1007 Author: Date:
2005 SEQUOIA (RM1146U)
DTC of SIGNAL CHECK (TEST DIAGNOSIS) function:
If a malfunction code is displayed during the test mode DTC check, check the circuit listed for that code. For
details of each code, refer to the ºSee Pageº under respective ºDTC No.º in the chart.
DTC No.
(See Page)Detection ItemTrouble Area
C2181/81
(DI±834)Transmitter ID1 not received
Tire pressure monitor receiver assy
Each tire pressure monitor valve sub±assy
Tire pressure monitor ECU
Wire harness
C2182/82
(DI±834)Transmitter ID2 not received
Tire pressure monitor receiver assy
Each tire pressure monitor valve sub±assy
Tire pressure monitor ECU
Wire harness
C2183/83
(DI±834)Transmitter ID3 not received
Tire pressure monitor receiver assy
Each tire pressure monitor valve sub±assy
Tire pressure monitor ECU
Wire harness
C2184/84
(DI±834)Transmitter ID4 not received
Tire pressure monitor receiver assy
Each tire pressure monitor valve sub±assy
Tire pressure monitor ECU
Wire harness
C2185/85
(DI±834)Transmitter ID5 not received
Tire pressure monitor receiver assy
Each tire pressure monitor valve sub±assy
Tire pressure monitor ECU
Wire harness
C2191/91
(DI±870)Vehicle speed signal error
Vehicle speed sensor
Combination meter assy
Tire pressure monitor ECU
Wire harness
Page 1016 of 4323

DIDK1±01
DI±814
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1008 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
If a normal code is displayed during DTC check but the problem still occurs, check the circuits for each prob-
lem symptom in the order given in the table below and proceed to the relevant troubleshooting page.
SymptomSuspected AreaSee page
Tire pressure warning system does not operate.
1. Tire pressure monitor valve sub±assy
2. Tire pressure monitor receiver assy
3. Power source circuit
4. Tc terminal circuit
5. Combination meter assy
6. Tire pressure monitor ECU±
±
DI±878
DI±888
BE±55
±
DTC check cannot be done.
1. Power source circuit
2. Tc terminal circuit
3. Tire pressure monitor ECUDI±878
DI±888
±
Tire pressure warning lamp malfunctions (Does not light up).
1. Power source circuit
2. Tire pressure warning lamp circuit
3. Combination meter assy
4. Tire pressure monitor ECUDI±878
DI±873
BE±55
±
Tire pressure warning lamp malfunctions (Remains ON).
1. Tire pressure check
2. Tire pressure monitor ECU connector poorly connected
3. Tire pressure warning lamp circuit
4. Combination meter assy
5. Tire pressure monitor ECUSA±3
±
DI±873
BE±55
±
Tire pressure warning lamp malfunctions (Blinking).
1. Check DTC
2. Tc terminal circuit
3. Test mode (SIGNAL CHECK)
4. Tire pressure monitor ECUDI±820
DI±888
DI±810
±
Initialization cannot be done.
1. Test mode (SIGNAL CHECK)
2. Tire pressure warning reset switch
3. Tire pressure monitor ECUDI±810
DI±875
±