LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2020 >> UX 200 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 31 (Smart Access System W/ Push-Button Start (Start Function) (Diagnostic Codes & Symptom Tests (1 Of 2)) (Hybrid)) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function, HV Model) >> DTC B2284: Brake Signal Malfunction [10/2018 - ] >> Description

DTC B2284: Brake Signal Malfunction [10/2018 - ]: Description

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus UX 250h, 2023 Lexus UX 250h, 2022 Lexus UX 250h, 2021 Lexus UX 250h, and 2020 Lexus UX 250h. However, it is still accessible from the selected car via links, so may be relevant.

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*)
  • Electronically controlled brake system
  • Stop light switch assembly
  • Certification ECU (smart key ECU assembly)
  • Wire harness or connector
 DTC Output Confirmation Operation: 
  1. 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.
  1. *: Only detected while a malfunction is present and the power switch is on (IG).
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 a hybrid control system start operation is performed, the hybrid control system does not start (the key indicator display is not displayed on the multi-information display). However, the hybrid control system can be started by turning the power switch on (ACC) and then pressing and holding it.
  • If there is a malfunction when the brake signal sent via direct line is on, the hybrid control system can be started by pressing the power switch with the brake pedal released.
  • If there is a malfunction when the brake signal sent via direct line is off, the hybrid control system cannot be started by pressing the power 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

Hybrid Control 
  • Stop Light Switch
scientia non olet · About LEMON Manuals