Toyota Sequoia (2005). Manual - part 250

F16805

Suspension Control ECU
Wire Harness View:

S25

IG

–

DIAGNOSTICS

AIR SUSPENSION SYSTEM

DI–795

989

2

Inspect suspension control ECU.

PREPARATION:
Disconnect the ECU connector.
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:

Tester connection

(Symbol)

Condition

Specified condition

S25–10 (IG) –

Body ground

Ignition switch OFF 

→

 ON

Below 1 V 

→

 10 to 14 V

RESULT:

NG

A

OK (When checking from step 1)

B

OK (When checking from step 2)

C

B

Replace suspension control ECU 
(See page 

IN–35

).

C

Proceed to next circuit inspection shown in
problem symptoms table (See page 

DI–716

).

A

Repair or replace harness or connector.

DIDJT–01

F19148

Combination Meter

Tire Pressure 
Warning Lamp

DI–796

–

DIAGNOSTICS

TIRE PRESSURE WARNING SYSTEM

990

TIRE PRESSURE WARNING SYSTEM

PRECAUTION

NOTICE:
When disconnecting the battery terminal, initialize the following system after the terminal is recon-
nected.

System Name

See Page

Back Door Power Window Control System

BE–77

1.

TIRE PRESSURE WARNING SYSTEM PRECAUTION

(a)

When the tire pressure warning lamp comes on, immedi-
ately check the tire pressure of the tire and adjust it to the
specified pressure. (The tire pressure warning lamp
comes on if there is an open in the tire pressure warning
lamp circuit.)

NOTICE:
Check the spare tire as well since this system monitors
pressure of all tires, including the spare.

Tire size

Front

Rear

Spare

P245 / 70 R 16

220 kPa (2.2 kgf/cm

2

, 32 psi)

240 kPa (2.4 kgf/cm

2

, 35 psi)

240 kPa (2.4 kgf/cm

2

, 35 psi)

P265 / 70 R 16

220 kPa (2.2 kgf/cm

2

, 32 psi)

220 kPa (2.2 kgf/cm

2

, 32 psi)

220 kPa (2.2 kgf/cm

2

, 32 psi)

P265 / 65 R 17

220 kPa (2.2 kgf/cm

2

, 32 psi)

220 kPa (2.2 kgf/cm

2

, 32 psi)

220 kPa (2.2 kgf/cm

2

, 32 psi)

(b)

When the tire pressure warning lamp blinks, there is a
malfunction in the system. Check for DTCs.

(c)

It is necessary to register the transmitter ID in the tire pres-
sure monitor ECU when replacing the tire pressure moni-
tor valve sub–assy and/or tire pressure monitor ECU (see
page 

DI–805

).

(d)

When replacing the tire pressure monitor ECU.
(1)

Using the DATA LIST, read the transmitter IDs regis-
tered in the ECU and make a note of them before
removing the tire pressure monitor ECU.

(2)

Register the transmitter IDs after installing a new
tire pressure monitor ECU.

(e)

When replacing the tire pressure monitor valve sub–assy.
(1)

Make a note of the 7 digit number (transmitter ID)
written on the tire pressure monitor valve sub–assy
when replacing the tire pressure monitor valve sub–
assy. Register the transmitter IDs in the tire pres-
sure monitor ECU after replacing the tire pressure
monitor valve sub–assy and installing the tires and
wheels on the vehicle.

F19132

Transmitter ID

–

DIAGNOSTICS

TIRE PRESSURE WARNING SYSTEM

DI–797

991

NOTICE:
The transmitter ID is written on the tire pressure monitor
valve sub–assy and ID can not be seen after installing the
tire pressure monitor valve sub–assy on the tire and wheel.
Therefore, make a note of the transmitter ID before instal-
ling the tire pressure monitor valve sub–assy.

2.

IN CASE OF TIRE AND WHEEL REPLACEMENT

(a)

When tires and wheels are replaced, register the transmitter ID without fail.

3.

IN CASE OF TIRE ROTATION OR REPLACEMENT OF TIRE PRESSURE MONITOR ECU, TIRE
PRESSURE MONITOR VALVE SUB–ASSY, OR TIRES WITH DIFFERENT TIRE PRESSURE

(a)

Initialize the tire pressure warning system after one of the following is performed:

Replacing the tire pressure monitor ECU or the tire pressure monitor valve sub–assy

Tire rotation

Replacing tires with different tire pressure

HINT:
The tire pressure warning system will not operate properly if it is not initialized

 

(see page 

DI–808

).

4.

FAIL–SAFE FUNCTION

(a)

When a system malfunction occurs in the tire pressure warning system, the tire pressure warning lamp
blinks and informs the driver of the system failure.

(b)

The result of this diagnosis is stored in the tire pressure monitor ECU.

DIDJU–01

F19149

Tire Pressure Sensor
(Tire Pressure Monitor
Valve Sub–assy)

Tire Pressure Sensor
(Tire Pressure Monitor
Valve Sub–assy)

Tire Pressure Sensor
(Tire Pressure Monitor
Valve Sub–assy)

Combination Meter Assy

 Tire Pressure Warning Lamp

Tire Pressure
Monitor ECU

Tire Pressure Warning
Reset Switch

Tire Pressure Sensor
(Tire Pressure Monitor Valve Sub–assy)

Tire Pressure Sensor
(Tire Pressure Monitor
Valve Sub–assy)

Tire Pressure Monitor
Receiver Assy

DI–798

–

DIAGNOSTICS

TIRE PRESSURE WARNING SYSTEM

992

LOCATION