Toyota Sequoia (2005). Manual — part 282

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DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–923

1117

C1361/62

(

DI–986

)

Abnormal battery voltage of VSC sensor

Battery

Charging system

Power source circuit

Yaw rate (deceleration) sensor

Skid control ECU

Master cylinder pressure sensor

C1362/36

(

DI–990

)

Malfunction in sensor offset value (VSC sensor system)

Skid control ECU

(Perform zero point calibration)

C1363/63

(

DI–991

)

Malfunction in booster pedal force switch

Booster pedal force switch (Active brake booster)

Booster pedal force switch (Active brake booster) circuit

U0100/65

(

DI–1075

)

Malfunction in vehicle CAN communication system

Vehicle CAN communication system

HINT:
There is a possibility that the hand–held tester cannot be used when the VSC TRAC warning light is always
ON.
*

1

: Check DTC chart C1203/53 first, then troubleshoot according to the DTC chart of translate ECU if neces-

sary.
*

2:

4WD

DTC chart of translate ECU (When DTC ”C1201/51, C1202/52, C1203/53 or U0100/65” of VSC system
is output):

DTC No.

(See Page)

Detection Item

Trouble Area

Normal code*

(

DI–1013

)

Malfunction in ECM control system or suspension control ECU

ECM circuit

ECM

Brake fluid level

Brake fluid level warning switch circuit

Steering angle sensor

Translate ECU

Skid control ECU

Vehicle CAN

VSC+, VSC– circuit (CAN1 communication system)

51

(

DI–995

)

Malfunction in ECM control system

ECM

53

(

DI–998

)

Malfunction in CAN1 communication

VSC+, VSC– circuit (CAN1 communication system)

Skid control ECU

Translate ECU

58

(

DI–1002

)

Malfunction of brake fluid level switch

Brake fluid level warning switch circuit

Brake fluid level warning switch

Brake fluid reservoir level

Translate ECU

65

(

DI–1005

)

Malfunction 1 of vehicle CAN

ENG+, ENG– circuit (CAN communication system)

ECM

Translate ECU

Suspension control ECU

94

(

DI–1009

)

Malfunction 2 of vehicle CAN

ENG+, ENG– circuit (CAN communication system)

ECM

Translate ECU

Suspension control ECU

Non–code

(

DI–1015

)

Malfunction in translate ECU

Brake warning light circuit

Tc terminal circuit

Translate ECU

*: Translate ECU is normal.

DI–924

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DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1118

If the brake warning light turns on, check that the parking brake pedal is released, the brake fluid level is
normal, and no malfunction is identified in the fluid level warning switch system.
If there is a problem with VSC, the brake warning light comes on. The possible causes of a problem are as
follows:

2 or more wheel speed sensor failures

Low/high voltage

Valve failure

DI93G–05

BR3583
BR3582

F00010

Rotor

Speed Sensor

Magnet

To ECU

+V

–V

High Speed

Low Speed

Coil

N

S

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DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–925

1119

CIRCUIT INSPECTION

DTC

C0200 / 31 – C0215 / 34

Speed Sensor Circuit

CIRCUIT DESCRIPTION

The speed sensor detects wheel speed and sends the ap-
propriate signals to the ECU. These signals are used to control
the ABS control system. The front and rear rotors have 48
serrations each.
When the rotors rotate, the magnetic field emitted by the perma-
nent magnet in the speed sensor generates AC voltage. Since
the frequency of this AC voltage changes in direct proportion to
the speed of the rotor, the frequency is used by the ECU to de-
tect the speed of each wheel.

DTC No.

DTC Detecting Condition

Trouble Area

C0200 / 31

C0205 / 32

C0210 / 33

C0215 / 34

When any of the following is detected:

1. During driving, speed sensor signals are not input for a

fixed time.

2. Momentary interruption in speed sensor signals occurs

many times during driving.

3. Abnormal signal occurs in pulse signal from speed sen-

sor during driving.

4. Speed sensor signal circuit continues to be open for a

fixed time.

Right front, left front, right rear and left rear speed sensor

Each speed sensor circuit

Sensor rotor

Skid control ECU

HINT:
DTC No. C0200 / 31 is for the right front speed sensor.
DTC No. C0205 / 32 is for the left front speed sensor.
DTC No. C0210 / 33 is for the right rear speed sensor.
DTC No. C0215 / 34 is for the left rear speed sensor.

F19767

ABS & VSC Actuator
(Skid Control ECU)

A7
ABS Speed Sensor
Front RH

33

46

34

2

1

1

2

FL–

FR–

RR+

FL+

RR–

RL+

RL–

2

1

FR+

S1

S1

S1

S1

S1

S1

S1

S1

42

43

36

37

1

2

A32
ABS Speed Sensor
Rear LH

A33
ABS Speed Sensor
Rear RH

A6
ABS Speed Sensor
Front LH

45

V

P

L

LG

G

G

G

G

R–B

R–B

R–B

R–B

BB2

6

IL1

14

BB2

BB2

BB2

IL1

IL1

IL1

13

5

8

7

O

O

O

O

Y

Y

Y

Y

6

5

IJ3

2

IJ3

13

IJ3

1

IJ3

12

DI–926

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DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1120

WIRING DIAGRAM