2001 TOYOTA SEQUOIA Page 18

F19136
Tire Pressure Monitor ECU:
T17
RF5V
GND2RDA
F19137
Tire Pressure Monitor Receiver Assy:
T19
+5V
GNDRDA
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±837
1031 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check DTC (See page DI±820).
CHECK:
Check if DTCs C2121/21, C2122/22, C2123/23, C2124/24 and C2125/25 are all output.
No Go to step 10.
Ye s
5 Check harness and connector (Tire pressure monitor receiver assy ± Tire pres-
sure monitor ECU).
PREPARATION:
Disconnect the tire pressure monitor receiver assy T19 connec-
tor and tire pressure monitor ECU T17 connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
T17±7 (RDA) ± T19±1 (RDA)Below 1 W
T17±8 (RF5V) ± T19±5 (+5V)Below 1 W
T17±16 (GND2) ± T19±4 (GND)Below 1 W
T17±7 (RDA) ± Body ground10 kW or higher
T17±8 (RF5V) ± Body ground10 kW or higher
T17±16 (GND2) ± Body ground10 kW or higher
NG Repair or replace harness or connector.
OK

F19138
Tire Pressure Monitor ECU:
T17
RF5V
GND2
DI±838
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1032 Author: Date:
2005 SEQUOIA (RM1146U)
6 Inspect tire pressure monitor ECU.
PREPARATION:
(a) Connect the tire pressure monitor ECU T17 connector.
(b) Turn the ignition switch to the ON position.
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:
Tester ConnectionConditionSpecified Condition
T17±8 (RF5V) ±
T17±16 (GND2)Ignition Switch ON4.5 to 5.5 V
NG Check power source circuit
(See page DI±878).
OK
7 Replace tire pressure monitor receiver assy (See page SA±13).
HINT:
Perform the inspection using parts from a normal vehicle when possible.
NEXT
8 Check DTC (See page DI±820).
PREPARATION:
Clear the DTCs.
CHECK:
Check for a DTC.
OK:
DTC is not output.
OK End
NG

± 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

± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±841
1035 Author: Date:
2005 SEQUOIA (RM1146U)
15 Check DTC again (See page DI±820).
CHECK:
Check for a DTC.
OK:
DTC is not output.
HINT:

If a DTC is output, replace the identified tire pressure monitor valve sub±assy.

Before installing a new tire pressure monitor valve sub±assy, read and write down its transmitter ID.

Register the transmitter ID after replacement and then set the tire pressure to the specified value (see
page DI±805).
NG Replace tire pressure monitor valve sub±assy
(See page SA±16).
OK
Replace tire pressure monitor receiver assy
(See page SA±13).

± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±843
1037 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 Check tire pressure warning lamp.
PREPARATION:
Turn the ignition switch to the ON position.
CHECK:
Check the tire pressure warning lamp.
RESULT:
Does not blinkA
Comes on and goes off repeatedly at 0.5 second intervalsB
B Go to step 5.
A
2 Identify transmitter corresponding to DTC (See page DI±881).
NEXT
3 Clear DTC (See page DI±820).
NEXT

DI±844
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1038 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check DTC (See page DI±820).
CHECK:
Check for a DTC.
OK:
DTC is not output.
HINT:

If the result is OK, replace the tire pressure monitor valve sub±assy specified in STEP 2.

Before installing a new tire pressure monitor valve sub±assy, read and write down its transmitter ID.

Register the transmitter ID after replacement and then set the tire pressure to the specified value (see
page DI±805).
NG Go to step 9.
OK
Replace tire pressure monitor valve sub±
assy (See page SA±16).
HINT:
Replace the identified tire pressure monitor valve sub±assy.
5 Identify transmitter corresponding to recorded DTC (See page DI±881).
NEXT
6 Replace tire pressure monitor valve sub±assy (See page SA±16).
PREPARATION:
Replace the identified tire pressure monitor valve sub±assy with a new one.
HINT:
Before installing a new tire pressure monitor valve sub±assy, read and write down its transmitter ID.
NEXT

F19326
DATA LIST:
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±845
1039 Author: Date:
2005 SEQUOIA (RM1146U)
7 Registration of transmitter ID (See page DI±805).
PREPARATION:
(a) Confirm the transmitter ID on the DATA LIST.
(b) Register the transmitter ID for all wheels.
(c) Set the tire pressure 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
8 Check DTC (See page DI±820).
CHECK:
Check for a DTC.
OK:
DTC is not output.
NG Go to step 9.
OK
End
9 Replace tire pressure monitor receiver assy (See page SA±13).
HINT:
Perform the inspection using parts from a normal vehicle when possible.
NEXT

DI±846
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1040 Author: Date:
2005 SEQUOIA (RM1146U)
10 Check DTC (See page DI±820).
PREPARATION:
Check for a DTC.
OK:
DTC is not output.
NG Replace tire pressure monitor ECU
(See page SA±20).
OK
End