Toyota Sequoia (2005). Manual — part 284

W02871

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–931

1125

Rear:
PREPARATION:
Remove the axle shaft (See page

SA–95

).

CHECK:
Check the sensor rotor serrations.
OK:

No scratches, missing teeth or foreign objects.

PREPARATION:
Remove the rear speed sensor (See page

BR–59

).

CHECK:
Check the sensor tip.
OK:

No scratches or foreign objects on the sensor tip.

NG

Replace speed sensor or rotor.

NOTICE:
Check the speed sensor signal after replacement (See
page

DI–899

).

HINT:
Remove any foreign matter if identified.
Check the output waveform again after reassembly.

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

).

F19768

F10
Fusible Link Block

ABS

B

5

3

B–R

47

S1

W–B

17

IL1

W–B

1

S1

W–B

W–B

A

A

J18
J/C

Battery

IG

9

IL1

32

S1

+BS

GND2

ABS&VSC Actuator (Skid Control ECU)

IFL

IFR

IRL

IRR

OFL

OFR

ORL

ORR

ASR1

SV1

SV2

BATT

ASR2

GND1

Skid Control ECU

DI–932

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1126

DTC

C0226 / 21

ABS & VSC Solenoid Circuit

CIRCUIT DESCRIPTION

This solenoid turns on when signals are received from the ECU and controls the pressure acting on the wheel
cylinders to control braking force.

DTC No.

DTC Detecting Condition

Trouble Area

C0226 / 21

Solenoid valve signal does not match the check result.

ABS & VSC actuator

ABS & VSC solenoid circuit

WIRING DIAGRAM

DI93H–03

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–933

1127

INSPECTION PROCEDURE

1

Check DTC once more (See page

DI–911

).

PREPARATION:
(a)

Clear the DTC.

(b)

Turn the ignition switch OFF.

CHECK:
Turn the ignition switch to the ON position, and check if the same DTC still remains in the memory.
RESULT:

DTC is output

A

DTC is not output

B

B

No problem.

A

Replace skid control ECU with actuator
(See page

BR–51

).

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

DI–934

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1128

DTC

C0278 / 11

ABS & VSC Relay Circuit

CIRCUIT DESCRIPTION

This relay supplies power to each ABS & VSC solenoid. If the initial check is OK, then the relay turns on after
the ignition switch is turned ON.

DTC No.

DTC Detecting Condition

Trouble Area

C0278 / 11

Relay circuit continues to be open for a fixed time when

solenoid relay is ON after ignition switch is turned ON.

ABS & VSC solenoid relay

ABS & VSC solenoid relay circuit

ABS & VSC motor relay

ABS & VSC motor relay circuit

WIRING DIAGRAM

DI93I–03