Toyota Sequoia (2005). Manual - part 288

F19771

F10 
Fusible Link Block

Instrument Panel J/B

I18 
Ignition SW

ABS & VSC Actuator
(Skid Control ECU)

ALT

B

5

8

W

1

1L

1

AM1

6

1C

2

4

1F

4

1C

Sub J/B No.3

8

3C

8

3A

W–L

1

2

ECU–IG

AM1

IG1

B–Y

B–R

B–R

B–R

B–R

B–R

B–R

A

J37

A

J38

A

J37

A

J37

1

IL1

13
S1

IG1

1

S7 
Steering Angel Sensor

IG

TRIG

SS1–

SS1+

BAT

ESS

10

11

3

9

B

Battery

W–L

Y

O

L

W

L

W

Translate ECU

20

T5

19

T5

18

T5

40

T5

1

T5

7

T5

11

T5

TRIG

SS1–

SS1+

GND

IG1

VSC+

VSC–

IL2

6

IL2

6

S1

2

S1

O

P–L

P–L

P–L

W–B

7

IL2

12

IL1

17

IL1

9

W–B

W–B

W–B

41

S1

S1

32

S1

CANH

CANL

+BO

GND1

GND2

O

O

O

A

A

A

A

A

J43
J/C

J18
J/C

IG

IG

1

J/C

2

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–947

1141

WIRING DIAGRAM

DI–948

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1142

INSPECTION PROCEDURE

HINT:
Start the inspection from step 1 when using the hand–held tester and start from step 2 when not using the
hand–held tester.

1

Check output value of the steering angle sensor.

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)

Check that the steering wheel is centered.

(d)

Select DATA LIST mode on the hand–held tester.

CHECK:
Check that the steering wheel turning angle value of the steering angle sensor displayed on the hand–held
tester changes when turning the steering wheel.

Item

Measurement Item /

Range (Display)

Normal Condition

Diagnostic Note

STEERING ANG

Steering sensor/
Min.: –1152 deg, 
Max.: 1150.875 deg

Left turn: Increase
Right turn: Decrease

–

OK:

Turn the steering wheel to the left: Value increases
Turn the steering wheel to the right: Value  decreases

HINT:
If the steering sensor zero point calibration is not performed, its value will be fixed to 1,150 deg.
Check after driving the vehicle straight ahead at a speed of 6.5 mph (10.5 km/h) or more.

OK

Go to step 7.

NG

2

Check the installation condition of the steering angle sensor.

CHECK:
Check steering angle sensor installation condition.
OK:

Steering angle sensor installed correctly.

NG

Repair or replace steering angle sensor.

NOTICE:
If the steering angle sensor has been replaced, drive the
vehicle straight ahead at a speed of 6.5 mph (10.5 km/h) or
more to calibrate the steering angle sensor.

OK

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–949

1143

3

Check for open and short circuit in harness and connector between steering
angle sensor and translate ECU (See page 

IN–35

).

NG

Repair or replace harness or connector.

OK

4

Check for open and short circuit in harness and connector between skid control
ECU and translate ECU (CAN1 circuit).

NG

Repair or replace harness or connector
(CAN1 circuit).

OK

5

Is DTC still output?

Check DTC on page 

DI–911

.

NO

No problem.

YES

DI–950

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1144

6

Replace the skid control ECU and check if trouble occurs again.

PREPARATION:
(a)

Clear the DTC.

(b)

Turn the ignition switch OFF.

CHECK:
Check if the same DTC still remains in the memory.
RESULT:

DTC is output

A

DTC is not output

B

B

END.

A

Replace steering angle sensor.

NOTICE:

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

DI–897

).

If the steering angle sensor has been replaced, drive the vehicle straight ahead at a speed of
6.5 mph (10.5 km/h) or more to calibrate the steering angle sensor.

7

Check DTC once more (See page 

DI–911

).

PREPARATION:
(a)

Clear the DTC.

(b)

Turn the ignition switch OFF.

CHECK:
Check if the same DTC still remains in the memory.
RESULT:

DTC is output

A

DTC is not output

B

B

END.

A

Replace skid control ECU with actuator
(See page 

BR–52

).

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

DI–897

).