2001 TOYOTA SEQUOIA warning

F19790
Combination MeterTire Pressure
Monitor ECU
Engine Room J/B I18
Ignition SWIGN1
B±O
IG2AM2 1C11
Battery 2
1HT17
C5GR±L
Tire Pressure
B±R
B 56
54AM2 24
6IND Instrument Panel J/B
C620
2D1
2C1 1C3
1J7
F10
Fusible Link BlockInstrument Panel J/B
W±R
W±R
B
T17 T18 Tire Pressure
Warning Reset SW
G±R
CALSW
GND
T17 1H
1H
1F7
1 10
W±B11 10 Instrument Panel J/B
W±B
A J8
J/C
IE1 2
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±875
1069 Author: Date:
2005 SEQUOIA (RM1146U)
Tire Pressure Warning Reset Switch Circuit
CIRCUIT DESCRIPTION
Receiving the signal from the tire pressure warning reset switch, the tire pressure monitor ECU indicates the
initialization of the pressure warning system.
WIRING DIAGRAM
DIDKG±01

F19144
Tire Pressure Warning Reset Switch
ON
OFF2
1
DI±876
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1070 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
tire pressure monitor ECU (see page DI±805).
1 Check tire pressure warning reset switch function.
CHECK:
Perform the tire pressure warning reset switch test in TEST MODE PROCEDURE (see page DI±810).
OK:
Reset switch ON: Tire pressure warning lamp comes on.
Reset switch OFF: Tire pressure warning lamp blinks.
NG Go to step 2.
OK
End.
2 Inspect tire pressure warning reset switch.
PREPARATION:
Disconnect the tire pressure warning reset switch connector.
CHECK:
Measure the resistance between terminals 1 and 2 of the tire
pressure warning reset switch when the tire pressure warning
switch is ON and OFF.
OK:
Switch ConditionSpecified Condition
ONBelow 1 W
OFF10 kW or higher
NG Replace tire pressure warning reset switch.
OK

F19884
Tire Pressure Warning Reset Switch
(harness side connector)
Tire Pressure Monitor ECU:T18
CALSW
T17
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±877
1071 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check harness and connector (Tire pressure warning reset switch ± Tire pres-
sure monitor ECU)
PREPARATION:
Disconnect the tire pressure warning reset switch T18 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±10 (CALSW) ± T18±1Below 1 W
T17±10 (CALSW) ± Body ground10 kW or higher
NG Repair or replace harness or connector.
OK
Replace tire pressure monitor ECU
(See page SA±20).

F19175
Tire Pressure
Monitor ECU
IG
GND T17
11 B±R
I18
Ignition SW
2
AM1
8 W
BatteryT172 8
3C
A
A J37
J/C
B±R
IG11 ECU±IG B±R
B±Y
1
52 AM1
ALT
BW±B
A
J8
J/C W±BW±L
F10
Fusible Link BlockInstrument Panel J/B8
3A
4
1F4
1C
1
1L6
1C Instrument Panel J/B
IE10
1F1
1H Instrument Panel J/B Sub J/B No. 3 DI±878
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1072 Author: Date:
2005 SEQUOIA (RM1146U)
ECU Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for the tire pressure monitor ECU. It also supplies power to the tire pressure monitor
receiver via the ECU.
WIRING DIAGRAM
DIDKH±01

F13970
ECU±IG Instrument
Panel J/B:
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±879
1073 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).
1 Inspect battery.
CHECK:
Check the battery voltage.
OK:
Voltage: 11 to 14 V
NG Check and repair charging system.
(See page CH±1)
OK
2 Inspect fuse (ECU±IG).
PREPARATION:
Remove the ECU±IG fuse from the instrument panel J/B.
CHECK:
Check continuity of the ECU±IG fuse.
OK:
Continuity
NG Check for a short in all harness and connector
connected to fuse and replace fuse.
OK

F19136
Tire Pressure Monitor ECU:
IG
T17
F19136
Tire Pressure Monitor ECU:
T17
GND
DI±880
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1074 Author: Date:
2005 SEQUOIA (RM1146U)
3 Inspect tire pressure monitor ECU (IG terminal voltage).
PREPARATION:
(a) Disconnect 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±2 (IG) ± Body groundIgnition Switch ON10 to 14 V
NG Repair or replace harness or connector
(IG circuit).
OK
4 Check harness and connector (Tire pressure monitor ECU ± Body ground).
PREPARATION:
Disconnect the tire pressure monitor ECU T17 connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
T17±11 (GND) ± Body groundBelow 1 W
NG Repair or replace harness or connector
(GND circuit).
OK
Replace tire pressure monitor ECU
(See page SA±20).

± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±881
1075 Author: Date:
2005 SEQUOIA (RM1146U)
Identify transmitter (Error in present)
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.
INSPECTION 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
DIDKI±01

DI±882
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1076 Author: Date:
2005 SEQUOIA (RM1146U)
3 Using hand±held tester, check the tire pressure data of each wheel.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position, and push the hand±held tester main switch ON.
(c) Select the item below in the DATA LIST, and read its value displayed on the hand±held tester.
TIRE PRESSURE:
ItemMeasurement item/
Range (Display)Normal ConditionDiagnostic Note
TIREPRESS1
ID1 tire inflation pressure/
min.: 0 kPa (0 kgfVcm2, 0 psi),
max.: 637.5 kPa (6.48 kgfVcm2,
92.2 psi)Actual tire inflation pressure±
TIREPRESS2
ID2 tire inflation pressure/
min.: 0 kPa (0 kgfVcm2, 0 psi),
max.: 637.5 kPa (6.48 kgfVcm2,
92.2 psi)Actual tire inflation pressure±
TIREPRESS3
ID3 tire inflation pressure/
min.: 0 kPa (0 kgfVcm2, 0 psi),
max.: 637.5 kPa (6.48 kgfVcm2,
92.2 psi)Actual tire inflation pressure±
TIREPRESS4
ID4 tire inflation pressure/
min.: 0 kPa (0 kgfVcm2, 0 psi),
max.: 637.5 kPa (6.48 kgfVcm2,
92.2 psi)Actual tire inflation pressure±
TIREPRESS5
ID5 tire inflation pressure/
min.: 0 kPa (0 kgfVcm2, 0 psi),
max.: 637.5 kPa (6.48 kgfVcm2,
92.2 psi)Actual tire inflation pressure±
CHECK:
Check the tire pressure data of each tire.
NEXT
4 Is any of the tire pressure data 120 kPa (1.2 kgf/cm2, 17 psi)?
No The detected DTC is for the front right wheel
transmitter.
Ye s
5 Rapidly reduce the pressure of front left wheel to 120 kPa (1.2 kgf/cm2, 17 psi).
NEXT