DTC

B1484

Brake switch system

DETECTION CONDITION

• Open circuit in the wiring harness between the ABS HU/CM terminal and the brake switch terminal

POSSIBLE CAUSE

• Brake switch malfunction

• Open circuit in the wiring harness between the ABS HU/CM terminal N and the brake switch terminal D

STEP

INSPECTION

ACTION

1

• Turn the ignition switch off.

• Disconnect the ABS HU/CM and brake switch connector.

• Inspect for continuity ABS HU/CM terminal N and brake switch terminal D.

• Is there continuity?

Yes

Go to the next step.

No

Repair or replace the wiring harness for open circuit between ABS HU/CM and brake switch, then go to the next step.

2

• Inspect the brake switch.

  (See BRAKE SWITCH INSPECTION.)

• Is the brake switch normal?

Yes

Go to the next step.

No

Replace the brake switch, then go to the next step.

(See BRAKE PEDAL REMOVAL/INSTALLATION.)

3

• Make sure to reconnect all disconnected connectors.

• Clear the DTC from the memory.

  (See ON-BOARD DIAGNOSIS[ABS].)

• Are the same DTCs present?

Yes

Replace the ABS HU/CM, then go to the next step.

(See ABS HU/CM REMOVAL/INSTALLATION.)

No

Go to the next step.

4

• Are any other DTC present?

Yes

Go to the applicable DTC inspection.

(See ON-BOARD DIAGNOSIS[ABS].)

No

DTC troubleshooting completed.