Toyota Sequoia (2005). Manual - part 307

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–1023

1217

INSPECTION PROCEDURE

1

Check operation of the ABS warning light.

PREPARATION:
(a)

Connect the hand–held tester to the DLC3.

(b)

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

(c)

Select the ACTIVE TEST mode on the hand–held.

CHECK:
Check that ”ON” and ”OFF” of the ABS warning light can be shown on the combination meter with the hand–
held tester.

Item

Vehicle Condition/Test Details

Diagnostic Note

ABS WARN LIGHT

Turn ABS warning light ON/OFF

Observe combination meter

OK:
ABS warning light operates.

NG

Go to step 4

OK

2

Is DTC output?

Check DTC on page 

DI–911

.

YES

Repair circuit indicated by the output code 
(See page 

DI–921

).

NO

3

Check that the skid control ECU connector is securely connected to the skid
control ECU (See page 

IN–35

).

NG

Connect the connector to the skid control ECU.

OK

DI–1024

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1218

4

Check harness and connector between skid control ECU and combination meter
(See page 

IN–35

).

NG

Repair or replace harness or connector.

OK

5

Check ABS warning light.

See combination meter troubleshooting on page 

DI–1614

.

NG

Repair combination meter assembly
(See page 

DI–1610

).

OK

Check and replace skid control ECU
(See page 

BR–52

).

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

DI–897

).

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–1025

1219

ABS Warning Light Circuit (Does not light up)

CIRCUIT DESCRIPTION

See page 

DI–1021

.

WIRING DIAGRAM

See page 

DI–1021

.

INSPECTION PROCEDURE

1

Check operation of the ABS warning light.

When using the hand–held tester:
PREPARATION:
(a)

Connect the hand–held tester to the DLC3.

(b)

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

(c)

Select the ACTIVE TEST mode on the hand–held.

CHECK:
Check that ”ON” and ”OFF” of the ABS warning light can be shown on the combination meter with the hand–
held tester.

Item

Vehicle Condition/Test Details

Diagnostic Note

ABS WARN LIGHT

Turn ABS warning light ON/OFF

Observe combination meter

OK:
ABS warning light operates.
When not using the hand–held tester:
PREPARATION:
(a)

Turn the ignition switch OFF.

(b)

Disconnect the connector from the skid control ECU.

(c)

Turn the ignition switch to the ON position.

CHECK:
Check the ABS warning light comes on.
OK:

ABS warning light comes on.

NG

Go to step 2.

OK

Check and replace skid control ECU
(See page 

BR–52

).

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

DI–897

).

DIDML–01

DI–1026

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1220

2

Check harness and connector between skid control ECU and combination meter
(See page 

IN–35

).

NG

Repair or replace harness or connector.

OK

3

Check ABS warning light.

See combination meter troubleshooting on page 

DI–1614

.

NG

Repair combination meter assembly
(See page 

DI–1610

).

OK

Check and replace skid control ECU
(See page 

BR–52

).

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

DI–897

).