ENTRY AND START SYSTEM, Diagnostic DTC:B2284

DTC Code DTC Name
B2284 Brake Signal Malfunction

DESCRIPTION

This DTC is output when: 1) the brake signal circuit between the main body ECU and the stop light switch is malfunctioning; and 2) the CAN information is inconsistent.

DTC No. Detection Condition Trouble Area
B2284 Communication or communication line is abnormal between main body ECU and stop light switch

  • Main body ECU

  • Stop light switch assembly

  • STOP fuse

  • Lighting system

  • Harness or connector

WIRING DIAGRAM

A01GXVBE04

INSPECTION PROCEDURE

Note

Inspect the fuses of circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SW)


    1. Use the Data List to check if the stop light switch is functioning properly.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Stop Light SW Stop light switch/ON or OFF

      ON: Brake pedal depressed

      OFF: Brake pedal released

      		 -
      Result
      Result Proceed to
      Display on tester does not change according to brake pedal operation A
      Display on tester changes according to brake pedal operation B

    B

    REPLACE MAIN BODY ECU

    A

  2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY, STOP LIGHT SWITCH ASSEMBLY)

    A01H19LE06

    1. Disconnect the DH main body ECU connector.

    2. Disconnect the A95 stop light switch connector.

    3. Measure the voltage and resistance according to the value(s) in the table below.

      Standard voltage
      Tester Connection Condition Specified Condition
      A95-1 (B) - Body ground Always 11 to 14 V
      Standard resistance
      Tester Connection Condition Specified Condition
      DH-15 (STP) - A95-2 (L) Always Below 1 Ω
      DH-15 (STP) or A95-2 (L)- Body ground Always 10 kΩ or higher
      A95-3 (GND)- Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT STOP LIGHT SWITCH ASSEMBLY


    1. Inspect the stop light switch assembly Click here.

      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    C

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    A

    REPLACE MAIN BODY ECU