2001 TOYOTA SEQUOIA Page 18

DIDK6±01
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±825
1019 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSTIC TROUBLE CODE CHART
HINT:

If no abnormality is found when the parts are inspected, inspect the tire pressure monitor ECU.

If a malfunction code is displayed during the DTC check, inspect the circuit listed for that code. For
details of each code, refer to the ºSee pageº under respective ºDTC No.º in the DTC chart.
DTC chart of Tire Pressure Warning:
DTC No.
(See Page)Detection ItemTrouble Area
C2111/11
(DI±827)Transmitter ID1 operation stop

Tire pressure monitor valve sub±assy

Tire pressure monitor receiver assy

Tire pressure monitor ECU
C2112/12
(DI±827)Transmitter ID2 operation stop

Tire pressure monitor valve sub±assy

Tire pressure monitor receiver assy

Tire pressure monitor ECU
C2113/13
(DI±827)Transmitter ID3 operation stop

Tire pressure monitor valve sub±assy

Tire pressure monitor receiver assy

Tire pressure monitor ECU
C2114/14
(DI±827)Transmitter ID4 operation stop

Tire pressure monitor valve sub±assy

Tire pressure monitor receiver assy

Tire pressure monitor ECU
C2115/15
(DI±827)Transmitter ID5 operation stop

Tire pressure monitor valve sub±assy

Tire pressure monitor receiver assy

Tire pressure monitor ECU
C2121/21
(DI±834)Transmitter ID1 not received

Tire pressure monitor valve sub±assy

Tire pressure monitor receiver assy

Tire pressure monitor ECU

Wire harness
C2122/22
(DI±834)Transmitter ID2 not received

Tire pressure monitor valve sub±assy

Tire pressure monitor receiver assy

Tire pressure monitor ECU

Wire harness
C2123/23
(DI±834)Transmitter ID3 not received

Tire pressure monitor valve sub±assy

Tire pressure monitor receiver assy

Tire pressure monitor ECU

Wire harness
C2124/24
(DI±834)Transmitter ID4 not received

Tire pressure monitor valve sub±assy

Tire pressure monitor receiver assy

Tire pressure monitor ECU

Wire harness
C2125/25
(DI±834)Transmitter ID5 not received

Tire pressure monitor valve sub±assy

Tire pressure monitor receiver assy

Tire pressure monitor ECU

Wire harness
C2141/41
(DI±842)Transmitter ID1 error

Tire pressure monitor valve sub±assy

Tire pressure monitor ECU

Tire pressure monitor receiver assy
C2142/42
(DI±842)Transmitter ID2 error

Tire pressure monitor valve sub±assy

Tire pressure monitor ECU

Tire pressure monitor receiver assy
C2143/43
(DI±842)Transmitter ID3 error

Tire pressure monitor valve sub±assy

Tire pressure monitor ECU

Tire pressure monitor receiver assy
C2144/44
(DI±842)Transmitter ID4 error

Tire pressure monitor valve sub±assy

Tire pressure monitor ECU

Tire pressure monitor receiver assy
C2145/45
(DI±842)Transmitter ID5 error

Tire pressure monitor valve sub±assy

Tire pressure monitor ECU

Tire pressure monitor receiver assy

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

± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±829
1023 Author: Date:
2005 SEQUOIA (RM1146U)
4 Forcibly transmit transmitter ID.
PREPARATION:
(a) Forcibly transmit the transmitter ID by performing the following:
(1) Set the tire pressure to the specified value.
(2) Rotate the tire 90 to 270 degrees.
(3) Rapidly reduce the pressure of all tires to 120 kPa (1.2 kgf/cm
2, 17 psi respectively).
(4) Perform the steps mentioned above to all tires including the spare tire.
NEXT
5 Check DTC (See page DI±820).
CHECK:
Check for a DTC.
OK:
DTC is not output.
HINT:
A system error is probable if NG. If any DTC other than C2111/21, C2112/22, C2113/23, C2114/24 and
C2115/25, is output, perform troubleshooting according to that DTC.
OK Set tire pressure to normal value (Transmitter
stop condition is completely reset).
NG
6 Check DTC (See page DI±820).
CHECK:
Check if DTCs C2111/21, C2112/22, C2113/23, C2114/24 and C2115/25 are all output.
No Go to step 12.
Ye s

F19136
Tire Pressure Monitor ECU:
T17
RF5V
GND2RDA
F19137
Tire Pressure Monitor Receiver Assy:
T19
+5V
GNDRDA
F19138
Tire Pressure Monitor ECU:
T17
RF5V
GND2
DI±830
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1024 Author: Date:
2005 SEQUOIA (RM1146U)
7 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:
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
8 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

± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±831
1025 Author: Date:
2005 SEQUOIA (RM1146U)
9 Replace tire pressure monitor receiver assy (See page SA±13).
NEXT
10 Check DTC (See page DI±820).
PREPARATION:
Clear the DTCs.
CHECK:
Check for a DTC.
OK:
DTC is not output.
OK End
NG
11 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

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

F19139
Example:
Front
A
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±833
1027 Author: Date:
2005 SEQUOIA (RM1146U)
16 Forcibly transmit transmitter ID.
PREPARATION:
Remove the valve core of tire ºAº, rapidly reduce the tire pres-
sure and forcibly transmit the transmitter ID of the tire pressure
monitor valve sub±assy.
NEXT
17 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).

DI±836
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1030 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 4.
A
2 Clear DTC (See page DI±820).
NEXT
3 Check DTC (See page DI±820).
CHECK:
Check for a DTC.
OK:
DTC is not output.
NG Go to step 4.
OK
Check problem symptoms table
(See page DI±814).