Toyota Sequoia (2005). Manual - part 305

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–1015

1209

DTC

Non – Code

Translate ECU malfunction

CIRCUIT DESCRIPTION

Translate ECU DTCs can be read by blinks of the brake warning light (see page 

DI–911

).

DTC No.

DTC Detecting Condition

Trouble Area

Non – code*

Translate ECU internal malfunction is detected.

Brake warning light circuit

Tc terminal circuit

Translate ECU

*: Neither the normal system code nor a trouble code is output.

INSPECTION PROCEDURE

1

Check the BRAKE warning light circuit (See page 

DI–1033

).

OK:

BRAKE warning light circuit is normal.

NG

Repair or replace the BRAKE warning light cir-
cuit.

OK

2

Check the Tc terminal circuit (See page 

DI–1055

).

OK:

Tc terminal circuit is normal.

NG

Repair or replace the Tc terminal circuit.

OK

Check and replace the translate ECU.

DI942–03

DI–1016

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1210

DTC

Always ON*

Malfunction in Skid Control ECU

*: ABS warning light
When reading DTCs by SST (CHECK WIRE), if the ABS warning light remains ON, troubleshoot by following
the inspection flow.

CIRCUIT DESCRIPTION

DTC No.

DTC Detecting Condition

Trouble Area

Always ON

When any of the following conditions are detected:

1. Malfunction in ECU internal circuit is identified.

2. ECU power source voltage is too high.

Battery

Charging system

Power source circuit

ABS warning light circuit

Skid control ECU

HINT:
There is a possibility that the hand–held tester cannot be used when the ECU is abnormal.

DI943–03

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

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–1017

1211

WIRING DIAGRAM

F16990

ON

IG1

GND

DI–1018

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1212

INSPECTION PROCEDURE

1

Is DTC output?

Check DTC on page 

DI–911

.

YES

Repair circuit indicated by the output code 
(See page 

DI–921

).

NO

2

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

3

Check voltage between terminals IG1 and GND of the skid control ECU connec-
tor.

PREPARATION:
Disconnect the skid control ECU connector.
CHECK:
(a)

Turn the ignition switch to the ON position.

(b)

Measure the voltage between terminals IG1 and GND of
the skid control ECU harness side connector.

OK:

Voltage: 10 to 14 V

NG

Check for open and short circuit in harness and
connector between ECU–IG fuse and skid con-
trol ECU (See page 

IN–35

).

OK