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

DTC Code DTC Name
B2284 Brake Signal Malfunction

DESCRIPTION

This DTC is stored when the brake signal information from the cable and the brake signal information from the CAN communication line are inconsistent

Tech Tips

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

DTC Code DTC Detection Condition Trouble Area
B2284 The brake signal information from the cable and the brake signal information from the CAN communication line are inconsistent.

  • STOP fuse

  • AM2 fuse

  • Stop light switch assembly

  • Engine control system

  • Power management control ECU

  • Harness or connector

WIRING DIAGRAM

A01DM6TE10

INSPECTION PROCEDURE

Note


  • When using the intelligent tester with the engine switch off to troubleshoot: Connect the intelligent tester to the vehicle and turn a courtesy light switch on and off at 1.5 second intervals until communication between the intelligent tester and vehicle begins.

  • Before performing the inspection, check that there are no problems related to the CAN communication system and LIN communication system.

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

Tech Tips

Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)


    1. A01DTX6E06
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the G51 power management control ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G51-2 (AM21) - Body ground Always 9.5 to 14 V
      G51-1 (AM22) - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)


    1. Disconnect the G51 power management control ECU connector.

    2. A01DTX6E07
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G51-6 (GND) - Body ground Always Below 1 Ω
      G51-5 (GND2) - Body ground

    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. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY)


    1. Disconnect the G50 power management control ECU connector.

    2. Disconnect the A85 stop light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G50-11 (STP1) - A85-2 (L) Always Below 1 Ω
      G50-11 (STP1) or A85-2 (L) - Body ground Always 10 kΩ or higher
      A85-3 (GND) - Body ground Always Below 1 Ω
    4. A01DT01E02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Reconnect the A85 stop light switch assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G50-11 (STP1) - Body ground Brake pedal not depressed Below 1 V
      Brake pedal depressed ([Voltage at terminal AM21 or AM22] minus 2.0 V) or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Power Source Control / Data List.

    5. According to the display on the intelligent tester, read the Data List.

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Stop Light Switch1 Stop light switch 1 / ON or OFF

      ON: Brake pedal depressed

      OFF: Brake pedal released

      		 -
      OK
      ON (brake pedal depressed) or OFF (brake pedal released) appears on the screen according to the stop light switch condition.

    NG

    CHECK SFI SYSTEM*1 OR ECD SYSTEM*2 Click here

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  6. CHECK SFI SYSTEM*1 OR ECD SYSTEM*2


    1. Check the SFI system*1 or ECD system*2.


      • *1: for 1GR-FE and 2TR-FE

      • *2: for 1KD-FTV

      Item
      Engine Series Proceed to
      1GR-FE A
      2TR-FE B
      1KD-FTV (w/o DPF) C
      1KD-FTV (w/ DPF) D

    B

    GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    C

    GO TO ECD SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    D

    GO TO ECD SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    A

    GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here