ENTRY AND START SYSTEM (for Start Function), Diagnostic DTC:B2284

DTC Code DTC Name
B2284 Brake Signal Malfunction

DESCRIPTION

This DTC is output when: 1) the brake signal circuit between the power source control ECU and the stop light switch is malfunctioning; and 2) the BEAN information is inconsistent.

Tech Tips

When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

DTC No. DTC Detection Condition Trouble Area
B2284 Communication or communication line is abnormal between the power source control ECU and the stop light switch

  • Stop light switch

  • Multiplex communication system

  • CAN communication system

  • ECM

  • Power source control ECU

  • Wire harness or connector

WIRING DIAGRAM

A015Z8WE02

INSPECTION PROCEDURE

Tech Tips

Check the connector connection to the terminal to make sure that there is no abnormally such as a loose connection, deformations, etc.

PROCEDURE


  1. CHECK MULTIPLEX COMMUNICATION SYSTEM


    1. Clear the DTC Click here.

    2. Check for the multiplex communication system DTCs B1210, B1214 and B1215.

      Tech Tips

      If the DTCs for the multiplex network communication system malfunction are output, inspect those DTCs first.

      OK
      DTC is not output.

    NG

    GO TO MULTIPLEX COMMUNICATION SYSTEM Click here

    OK

  2. CHECK CAN COMMUNICATION SYSTEM


    1. Clear the DTC Click here.

    2. Check for the CAN communication system DTCs Click here.

      Tech Tips

      If the DTCs for the CAN communication system malfunction are output, inspect those DTCs first.

      OK
      DTC is not output.

    NG

    GO TO CAN COMMUNICATION SYSTEM Click here

    OK

  3. CHECK SFI SYSTEM


    1. Clear the DTC Click here.

    2. Check for the SFI system DTCs.

      Tech Tips

      If the DTCs for the SFI system malfunction are output, inspect those DTCs first.

      OK
      DTC is not output.

    NG

    GO TO SFI SYSTEM Click here

    OK

  4. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Read the Data List according to the displays on the intelligent tester.

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Stop Light Switch1 Stop light switch1 / ON or OFF

      ON: Brake pedal depressed

      OFF: Brake pedal released

      		 -

    NG

    REPLACE ECM Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (BATTERY - POWER SOURCE CONTROL ECU)


    1. A0161Z0E41

      Disconnect the J55 connector from power source control ECU.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      J55-1 (STP) - Body ground Brake Pedal released Below 1 V
      J55-1 (STP) - Body ground Brake pedal depressed 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - POWER SOURCE CONTROL ECU)

    OK

    REPLACE POWER SOURCE CONTROL ECU