DTC B1484 [ABS]

id0402a7805400

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

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT ABS HU/CM TO BRAKE SWITCH FOR OPEN CIRCUIT • Turn the ignition switch to the LOCK position. • 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 BRAKE SWITCH • 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 | VERIFY TROUBLESHOOTING COMPLETED • 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 | VERIFY AFTER REPAIR PROCEDURE • Are any other DTC present? | Yes | Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [ABS].)
No | DTC troubleshooting completed.