Toyota Sequoia (2005). Manual - part 306

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–1019

1213

4

Check battery positive voltage.

CHECK:
Check the battery positive voltage.
OK:

Voltage: 10 to 14 V

NG

Check and repair the charging system 
(See page 

CH–1

).

OK

5

Check the Tc terminal circuit (See page 

DI–1055

).

OK:

Tc terminal circuit is normal

NG

Repair or replace the Tc terminal circuit.

OK

DI–1020

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1214

6

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 push the hand–held tester main switch ON.

(c)

Select ACTIVE TEST mode on the hand–held tester.

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

Item

Vehicle Condition / Test Details

Diagnostic Note

ABS WARN LIGHT

Turns ABS warning light ON / OFF

Observe combination me-
ter

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.

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

).

NG

7

Check ABS warning light.

See combination meter troubleshooting on page 

DI–1614

.

NG

Repair combination meter assembly
(See page 

DI–1610

).

OK

Check for short circuit in harness and connector between ABS warning light and skid control
ECU (See page 

IN–35

).

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DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–1021

1215

ABS Warning Light Circuit (Remains ON)

CIRCUIT DESCRIPTION

If the ECU detects trouble, it turns on the ABS warning light and prohibits ABS control. At this time, the ECU
records a DTC in memory.
Connect terminals Tc and CG of the DLC3 to make the ABS warning light blink and indicate the DTC.

DI944–04

F19777

ABS & VSC Actuator 
(Skid Control ECU)

WA

35

S1

R–W

IL2

4

R–W

21

C6 
Combination Meter

Instrument Panel J/B

11

1H

B–O

24

2

1C

IGN1

B–R

I18 
Ignition SW

IG2

AM2

IG1

AM1

3

1C

6

1C

4

1C

7

1J

1

1L

4

1F

AM1

ECU–IG

1

2

2

6

5

1

W–R

W–L

B–Y

W–R

W

B

B

1

2C

1

2D

B–R

Sub J/B No.3

8

3A

8

3C

B–R

B–R

B–R

B–R

W–B

A

J37

A

J38

A

J37

1

IL1

13

S1

IG1

IG1

GND

1

40

O

O

A

A

A

A

W–B

W–B

W–B

J18 
J/C

J43 
J/C

17

IL1

9

IL1

1

S1

GND1

GND2

32

S1

IG

IG

W

B

B

5

8

4

ALT

F10 
Fusible 
Link 
Block

Battery

Engine Room J/B

AM2

J/C

T5 
Translate ECU

ABS

B–R

DI–1022

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DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1216

WIRING DIAGRAM