2001 TOYOTA SEQUOIA ECU

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).

F19795
A20
Airbag Sensor
AssemblySub J/B No.4Tire Pressure
Monitor ECU
T5 Translate ECU
D6
DLC3TC
E4P±B P±B
TC
P±B
13
TC
TCP±B
GT17
4D5
1A94A5
4C
5 4E5 ECM
23
4B
5
CG4
J43
J/CO
15
1F
O 15A
IGA12
TC
Instrument Panel J/BP±B DI±888
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1082 Author: Date:
2005 SEQUOIA (RM1146U)
Tc and CG Terminal Circuit
CIRCUIT DESCRIPTION
DTC output mode is set by connecting terminals TC and CG of the DLC3.
The DTCs are indicated by blinking of the tire pressure warning lamp.
WIRING DIAGRAM
HINT:
When each warning lamp stays blinking, a ground short in the wiring of terminal TC of the DLC3 or an internal
ground short in each ECU is suspected.
DIDKK±01

D13491
TC
D6DLC3:
F19136
T17
TC
Tire Pressure Monitor ECU:
D13491CGD6
DLC3:
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±889
1083 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 Check harness and connector (DLC3 ± Tire pressure monitor ECU).
PREPARATION:
Disconnect the tire pressure monitor ECU T17 connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester connectionConditionSpecified condition
D6±13 (TC) ±
T17±12 (TC)AlwaysBelow 1 W
NG Repair or replace harness or connector.
OK
2 Check harness and connector (DLC3 ± Body ground).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester connectionConditionSpecified condition
D6±4 (CG) ±
Body groundAlwaysBelow 1 W
NG Repair or replace harness or connector.
OK

F19136
T17
TC
Tire Pressure Monitor ECU:
DI±890
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1084 Author: Date:
2005 SEQUOIA (RM1146U)
3 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 connectionConditionSpecified condition
T17±12 (TC) ±
Body groundAlways10 kW or higher
NG Repair or replace harness or connector and
each ECU.
OK
Replace tire pressure monitor ECU
(See page SA±20).

DIDLU±01
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±891
1085 Author: Date:
2005 SEQUOIA (RM1146U)
ABS WITH EBD & BA & TRAC & VSC SYSTEM
PRECAUTION
NOTICE:
When disconnecting the battery terminal, initialize the following system after the terminal is recon-
nected.
System NameSee Page
Back Door Power Window Control SystemBE±77

When there is a malfunction in the contact point of the terminals or installation problems with
parts, removal and installation of the suspected problem parts may return the system to the
normal condition either completely or temporarily.

In order to determine the malfunctioning area, be sure to check the conditions at the time the
malfunction occurred, such as by DTC output and freeze frame data output, and record it before
disconnecting each connector or removing and installing parts.

Since the ABS with EBD & BA & TRAC & VSC systems may be influenced by a malfunction in
the other systems, be sure to check for DTCs in the other systems.

Be sure to remove and install the ABS & VSC actuator and each sensor with the IG switch OFF
unless specified in the inspection procedure.

When removing and installing the ABS & VSC actuator and each sensor, be sure to check that
the normal display is output in test mode inspection and in DTC output inspection after instal-
ling all the parts.

After replacing the yaw rate sensor and/or the ABS & VSC actuator assembly, make sure to per-
form yaw rate and deceleration sensors' zero point calibration
(See page DI±897).

The CAN communication system is used for data communication between the skid control ECU
(included in the actuator), the steering angle sensor, and the yaw rate sensor (the deceleration
sensor is included). If there is trouble in the CAN communication line, the DTC of the commu-
nication line is output.

If the DTC of the CAN communication line is output, repair the malfunction and troubleshoot
the ABS with EBD & BA & TRAC & VSC systems.

Since the CAN communication line has its own length and route, it can not be repaired tempo-
rarily with the bypass wire, etc.

DIDLV±01
F17996
Front Speed SensorABS & VSC Actuator
(w/ Skid Control ECU)Level Warning Switch
Rear Speed Sensor Rear Speed Sensor Rotor
Front Speed
Sensor Rotor
Parking Brake SwitchStop Light Switch
Center Diff. Lock Switch *1
TRAC OFF Switch *2
Steering Angle Sensor
DLC3Brake Inhibit RelayTranslate ECU
VSC BuzzerBrake Booster
(Including Active Brake Booster
Solenoid, Delta S Sensor and Boost-
er Pedal Switch)
Master Cylinder
Pressure Sensor
Front Speed Sensor Rotor
Front Speed Sensor
Yaw Rate Sensor
(Including Deceleration Sensor)
ABS Warning Light
VSC TRAC Warning light
VSC OFF Indicator Light *
1
TRAC OFF Indicator Light *2
BRAKE Warning Light
SLIP Indicator Light
*1: Only for 4WD
*2: Only for 2WDCenter Diff. Lock
Position Switch
DI±892
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1086 Author: Date:
2005 SEQUOIA (RM1146U)
LOCATION