Toyota Sequoia (2005). Manual — part 293

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DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–967

1161

INSPECTION PROCEDURE

1

Check pump motor operation.

PREPARATION:
(a)

Select the item ”ABS MOTOR RELAY” in the ACTIVE TEST and operate the ABS motor relay on the
hand–held tester.

(b)

Check the operation sound of the ABS pump motor when operating it with the hand–held tester.

Item

Vehicle Condition / Test Details

Diagnostic Note

ABS MOT RELAY

Turns ABS motor relay ON / OFF

Operation of motor (click-
ing sound) can be heard

CHECK:
The operation sound of the pump motor should be heard.
OK:

Operation sound can be heard.

NG

Go to step 2.

OK

Check and replace ABS & VSC actuator with
skid control ECU (See page

BR–52

).

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

DI–897

).

F16991

GND

DI–968

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1162

2

Check continuity between terminal GND of the skid control ECU connector and
body ground.

PREPARATION:
Disconnect the skid control ECU connector.
CHECK:
Measure the resistance between terminal GND of the skid con-
trol ECU harness side connector and body ground.
OK:

Resistance: 1

Ω

or less

NG

Repair or replace harness or connector.

OK

Check and replace ABS & VSC actuator with
skid control ECU (See page

BR–52

).

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

DI–897

).

F14399

F16956

BSTP

BST

3

S1

31

17

4

A9
Active Brake Booster

ABS &VSC Actuator
(Skid Control ECU)

BSTP

BST

S1

G–B

LG–B

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–969

1163

DTC

C1310 / 11

Open or Short Circuit in Active Brake
Booster Solenoid Circuit

CIRCUIT DESCRIPTION

Operates when booster’s negative pressure is insufficient and allows for a stable braking control.

DTC No.

DTC Detecting Condition

Trouble Area

C1310 / 11

Open or short in active brake booster solenoid circuit.

Brake booster

Active brake booster solenoid circuit

WIRING DIAGRAM

DI93R–04

F13988

3

4

DI–970

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1164

INSPECTION PROCEDURE

1

Check active brake booster solenoid.

PREPARATION:
Disconnect the connector from the brake booster.
CHECK:
Check resistance between terminals 3 and 4 of the brake boost-
er.
OK:

Resistance: 1.1 to 1.7

Ω

NG

Replace brake booster.

OK

2

Check for open and short circuit in harness and connector between skid control
ECU and brake booster (See page

IN–35

).

NG

Repair or replace harness or connector.

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

).