Toyota Sequoia (2005). Manual - part 276

DIDLZ–01

F09750

DLC3

Ts

CG

BR3904

0.13 sec.

0.13 sec.

ON

OFF

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–899

1093

TEST MODE PROCEDURE

1.

When not using the hand–held tester:
SENSOR CHECK (TEST MODE)

NOTICE:

When having replaced the master cylinder pressure, yaw
rate and deceleration sensors and/or the ECU, perform
zero point calibration of the master cylinder pressure, yaw
rate and deceleration sensors (See page 

DI–897

).

HINT:
If the ignition switch is turned from the ON to the ACC or LOCK
position in test mode, test mode DTCs will be erased.

(a)

Procedures for test mode:
(1)

Turn the ignition switch OFF.

(2)

Check that the shift lever is in the P position, and
turn the steering wheel to the neutral position.

(3)

Using SST, connect terminals Ts and CG of the
DLC3.

SST

09843–18040

(4)

Start the engine.

(5)

Check that the ABS and VSC TRAC warning lights
blink.

HINT:
If the ABS and VSC TRAC warning lights do not blink, inspect
the ABS warning light circuit, VSC TRAC warning light circuit
and Ts terminal circuit.

(6)

Keep the vehicle in a stationary condition on a level
surface for 4 sec. or more.

ABS warning light circuit

DI–1021

 or 

DI–1025

VSC TRAC warning light circuit

DI–1027

 or 

DI–1031

Ts terminal circuit

DI–1057

F02135

Start Position

End Position

Within 

±

 5

°

DI–900

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1094

(b)

Check the yaw rate and deceleration sensor.
Shift the shift lever to the D position and drive the vehicle
at a vehicle speed of approx. 3 mph (5 km/h), turn the
steering wheel either to the left or right for 90

°

 or more,

and turn the vehicle through 180 degrees. Check that the
VSC buzzer sounds for 3 seconds upon start off. 
Stop the vehicle and shift the shift lever to the P position,
and check that the VSC buzzer sounds again for 3 se-
conds.

HINT:

If the VSC buzzer sounds twice, the sensor check has
been completed normally.

If the VSC buzzer does not sound, check the VSC buzzer
circuit (See page 

DI–1052

), then do the sensor check

again.

Drive the vehicle through 180

°

. At the end of the turn, the

direction of the vehicle should be within 180

°

 

±

 5

° of its

start position.

Do not spin the wheels.

If the buzzer sounds after start off, then the deceleration
sensor check has passed its check. If the buzzer sounds
at the completion of a curve, then the yaw rate sensor
check has passed its check. The buzzer sound should be
heard twice during the sensor checks.

(c)

Check the master cylinder pressure sensor.
(1)

Turn the ignition switch to the ON position.

(2)

Keep the vehicle in a stationary condition on a level
surface for 2 sec. or more.

(3)

Keeping the vehicle in a stationary condition and
not pressing on the brake pedal for 1 sec. or more,
depress the brake pedal with 147 N (15 kgf, 33 lbf)
or more for 2 sec. or more.

NOTICE:
If zero point calibration has never been performed on a new
ECU, master cylinder pressure sensor check cannot be
completed correctly. Perform zero point calibration first
(See page 

DI–897

).

HINT:
At this time, the buzzer sounds for 3 seconds.
(d)

Check the speed sensor.
Drive the vehicle straight forward.
When driving the vehicle at the speed of 28 mph (45 km/h)
or higher for several seconds, check that the ABS warn-
ing light goes off.

HINT:
There is a possibility that the sensor check is not completed if
the vehicle has its wheels spun or its steering wheel turned dur-
ing this check.
(e)

Stop the vehicle.

F09750

CG

Tc

DLC3

BR3893

Trouble Code (Example Code 72, 76)

ON

OFF

4 sec.

1.5 sec.

Repeat

2.5 sec.

0.5 sec.

0.5 sec.

0.5 sec.

0.5 sec.

7

7

2

6

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–901

1095

(f)

Read the DTC.
(1)

Using SST, connect terminals Tc and CG of the
DLC3.

SST

09843–18040

(2)

Read the number of blinks of the warning light.

HINT:

See the list of DTC (step 3).

If all sensors are normal, a normal system code is output
(A cycle of 0.25 sec. ON and 0.25 sec. OFF is repeated).

If 2 or more malfunctions are indicated at the same time,
the codes will be displayed in ascending order.

(3)

After doing the check, disconnect terminals Ts and
CG, Tc and CG of the DLC3, and turn the ignition
switch OFF.

SST

09843–18040

D05981

Hand–held 
Tester

DLC3

BR3904

0.13 sec.

0.13 sec.

ON

OFF

F02135

Start Position

End Position

Within 

±

 5

°

DI–902

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1096

2.

When using the hand–held tester:
SENSOR CHECK (TEST MODE)

NOTICE:
When having replaced the master cylinder pressure, yaw
rate and deceleration sensors and/or ECU, perform zero
point calibration of the master cylinder pressure, yaw rate
and deceleration sensors (See page 

DI–897

). Make sure

that this operation is done before performing the following.

(a)

Procedures for test mode:
(1)

Connect the hand–held tester to the DLC3.

(2)

Check that the shift lever is in the P position, and
turn the steering wheel to the neutral position.

(3)

Start the engine.

(4)

Select the SIGNAL CHECK on the hand–held tes-
ter.

(5)

Check that the ABS warning light and VSC TRAC
warning light blink.

HINT:
If the ABS and VSC TRAC warning lights do not blink, inspect
the ABS warning light circuit, VSC TRAC warning light circuit
and Ts terminal circuit.

(6)

Keep the vehicle in a stationary condition on a level
surface for 4 sec. or more.

ABS warning light circuit

DI–1021

 or 

DI–1025

VSC TRAC warning light circuit

DI–1027

 or 

DI–1031

Ts terminal circuit

DI–1057

(b)

Check the yaw rate and deceleration sensor.
Shift the shift lever to the D position and drive the vehicle
at a vehicle speed of approx. 3 mph (5 km/h), turn the
steering wheel either to the left or right for 90

°

 or more,

and turn the vehicle through 180 degrees. Check that the
VSC buzzer sounds for 3 seconds upon start off.
Stop the vehicle and shift the shift lever to the P position,
check that the VSC buzzer sounds again for 3 seconds.