DTC B2284: Brake Signal Malfunction [12/2019 - 10/2022]: Description

This DTC is stored when the brake signal sent via direct line and the brake signal sent via CAN communication do not match.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
B2284	Brake Signal Malfunction	The brake signal sent via direct line and the brake signal sent via CAN communication do not match. (1-trip detection logic*)	Stop light switch assembly SFI system Certification ECU (smart key ECU assembly) Wire harness or connector	DTC Output Confirmation Operation: Connect the cable to the negative (-) auxiliary battery terminal, release the brake pedal and wait at least 20 seconds. Then depress the brake pedal for 20 seconds or more.

*: Only detected while a malfunction is present and the ignition switch is ON.

VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED

Vehicle Condition when Malfunction Detected	Fail-safe Function when Malfunction Detected
With the electrical key transmitter sub-assembly in the cabin, even if an engine start operation is performed, the engine does not start (the key indicator display is not displayed on the multi-information display). However, the engine can be started by turning the ignition switch to ACC and then pressing and holding it. If there is a malfunction when the brake signal sent via direct line is on, the engine can be started by pressing the engine switch with the brake pedal released. If there is a malfunction when the brake signal sent via direct line is off, the engine cannot be started by pressing the engine switch with the brake pedal depressed.	-

Vehicle Condition when Malfunction Detected

Fail-safe Function when Malfunction Detected

With the electrical key transmitter sub-assembly in the cabin, even if an engine start operation is performed, the engine does not start (the key indicator display is not displayed on the multi-information display). However, the engine can be started by turning the ignition switch to ACC and then pressing and holding it.

If there is a malfunction when the brake signal sent via direct line is on, the engine can be started by pressing the engine switch with the brake pedal released.
If there is a malfunction when the brake signal sent via direct line is off, the engine cannot be started by pressing the engine switch with the brake pedal depressed.

RELATED DATA LIST AND ACTIVE TEST ITEMS

DTC No.	Data List and Active Test
B2284	Power Source Control Stop Light Switch1 Engine Stop Light SW

DTC No.

Data List and Active Test

B2284

Power Source Control

Stop Light Switch1

Engine

Stop Light SW