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 fuse

  • Stop light switch assembly

  • Lighting system

  • Harness or connector

WIRING DIAGRAM

A001976E08

CAUTION / NOTICE / HINT

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

      		 -
      OK
      ON (brake pedal depressed) appears on screen.

    NG

    REPLACE MAIN BODY ECU

    OK

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

    A001D1YE02
    *1 Front view of wire harness connector (to Stop Light Switch)
    *2 Front view of wire harness connector (to Main Body ECU)

    1. Disconnect the A79 stop light switch connector.

    2. Disconnect the DH main body ECU connector.

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

      Standard voltage
      Tester Connection Condition Specified Condition
      A79-1 (B) - Body ground Always 11 to 14 V
      Standard resistance
      Tester Connection Condition Specified Condition
      A79-2 (L) - DH-15 (STP) Always Below 1 Ω
      A79-2 (L) or DH-15 (STP) - Body ground Always 10 kΩ or higher
      A79-3 (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.


    NG

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    OK

  4. READ VALUE USING INTELLIGENT TESTER (STOP LIGHT TR)


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

      Body No.4
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Stop Light Tr. Stop light switch/ON or OFF

      ON: Brake pedal depressed

      OFF: Brake pedal released

      		 -
      OK
      ON (brake pedal depressed) appears on screen.

    OK

    GO TO LIGHTING SYSTEM Click here

    NG

    REPLACE MAIN BODY ECU