Toyota Sequoia (2005). Manual - part 290

F19784

Torque: 5 N·m (10 kgf·cm, 3.7ft·lbf)

F16996

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–955

1149

INSPECTION PROCEDURE

1

Check the yaw rate sensor installation.

CHECK:
Check the yaw rate sensor installation.
OK:

The sensor should be tightened to the specified
torque.
The sensor should not be tilted.

NG

Install yaw

 

rate sensor correctly.

OK

2

Check output value of the yaw rate sensor.

PREPARATION:
(a)

Remove the 2 bolts and the yaw rate sensor assembly
with the connector still connected.

(b)

Connect the hand–held tester to the DLC3.

(c)

Turn the ignition switch to the ON position and push the
hand–held tester main switch ON.

(d)

Select the DATA LIST mode on the hand–held tester.

CHECK:
Check that the yaw rate value of the yaw rate sensor displayed
on the hand–held tester changes: Place the yaw rate sensor
vertically to the ground and turn the sensor to the right and left.

Item

Measurement Item /

Range (Display)

Normal Condition

Diagnostic Note

YAW RATE

Yaw rate sensor/
Min.: –128 deg/s, Max.:
127 deg/s

Min.: –128 deg/s 
Max.: 128 deg/s

–

OK:

Yaw rate value changes.

 

NG

Replace yaw rate sensor.

NOTICE:
When replacing the yaw rate sensor, perform the zero point
calibration (See page 

DI–897

).

OK

F19145

Yaw Rate Sensor

VYS

GYAW

DI–956

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1150

3

Check voltage between terminal VYS and GYAW of the yaw rate sensor.

PREPARATION:
Disconnect the yaw rate sensor connecter.
CHECK:
(a)

Turn the ignition switch to the ON position.

(b)

Measure the voltage between terminal VYS and GYAW
of the yaw rate sensor harness side connector.

OK:

Voltage: 10 to 14 V

OK

Check and replace yaw rate sensor.

NOTICE:
When replacing the yaw rate sensor, perform the zero point
calibration (See page

 

DI–897

).

NG

4

Check for open and short circuit in harness and connector between yaw rate
sensor and skid control ECU (See page 

IN–35

).

NG

Repair or replace harness or connector.

OK

Replace skid control ECU
(See page 

BR–52

).

NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page 

DI–897

).

F19782

Battery

16

S1

+BS

GND1

GND2

+BM

S1

S1

S1

47

1

32

B–R

B–R

W–B

W–B

W–B

W–B

5

B

F10
Fusible Link Block

ABS & VSC Actuator
(Skid Control ECU)

IG

J18
J/C

A

A

3

ABS

Motor Relay

Pump
Motor

IL1

17

IL1

9

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–957

1151

DTC

C1241 / 41

Power Source Circuit

CIRCUIT DESCRIPTION

If there is a problem with the skid control ECU power supply circuit, the skid control ECU outputs DTC and
prohibits operation under the fail safe function.

DTC No.

DTC Detecting Condition

Trouble Area

C1241 / 41

When any of the following conditions are detected:

1. ECU terminal +BM/+BS voltage is too low for a fixed

time during driving.

2. ECU terminal +BM/+BS voltage is too high for a fixed

time while ignition switch is ON.

Battery

Charging system

Power source circuit (+BM, +BS)

Skid control ECU

WIRING DIAGRAM

DIDMA–01

DI–958

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1152

INSPECTION PROCEDURE

1

Check ABS fuse.

PREPARATION:
Remove the ABS fuse from the fusible link block.
CHECK:
Check continuity of the ABS fuse.
OK:

Continuity

NG

Check for short circuit in all the harnesses and
components connected to ABS fuse (See at-
tached wiring diagram).

OK

2

Check battery positive voltage.

OK:

Voltage: 10 to 14 V

NG

Check and repair the charging system
(See page 

CH–1

).

OK