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 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*)
  • AM2 fuse

  • STOP fuse

  • Stop light switch assembly

  • SFI system

  • Certification ECU (smart key ECU assembly)

  • Wire harness or connector


    DTC Output Confirmation Operation:

  • Connect the cable to the negative (-) battery terminal, release the brake pedal and wait at least 20 seconds. Then depress the brake pedal for 20 seconds or more.


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 an engine start operation is performed, the engine does not start (the indicator in the combination meter is not illuminated). However, the engine can be started by turning the engine switch on (ACC) and then pressing and holding it.


  • If there is a malfunction when the direct line is on, the engine can be started by pressing the engine switch with the brake pedal released.

  • If there is a malfunction when the direct line is off, the engine cannot be started by pressing the engine switch with the brake pedal depressed.

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Related Data List and Active Test Items
DTC No. Data List and Active Test
B2284

    Power Source Control

  • Stop Light Switch1


    Engine and ECT

  • ST1

WIRING DIAGRAM

B00766WE12

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • The entry and start system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

    Click here

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

  • Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Start Function) Precaution.

    Click here

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

Tech Tips

When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

PROCEDURE


  1. READ VALUE USING GTS (STOP LIGHT SWITCH1)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

    5. Read the Data List according to the display on the GTS.


      Body Electrical > Power Source Control > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Stop Light Switch1 State of brake pedal OFF or ON

      OFF: Brake pedal released

      ON: Brake pedal depressed


      • Use this item to determine whether the stop light switch is malfunctioning.

      • The engine cannot be started when this item is OFF.

      • If the stop light switch is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time.


      Body Electrical > Power Source Control > Data List
      Tester Display
      Stop Light Switch1
      OK
      The GTS display changes correctly in response to the brake pedal operation.
      Result
      Proceed to
      OK
      NG

    OK
    NG
  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    Result
    Proceed to
    OK
    NG

    1. B0077ESC20
      *a

      Front view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

      Disconnect the O6 certification ECU (smart key ECU assembly) connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      O6-10 (+B) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG
    OK
  3. CHECK HARNESS AND CONNECTOR (GROUND)

    Result
    Proceed to
    OK
    NG

    1. Disconnect the O6 certification ECU (smart key ECU assembly) connector.

    2. B0077ESC21
      *a

      Front view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O6-11 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG
    OK
  4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY)


    1. Disconnect the A13 certification ECU (smart Key ECU assembly) connector.

    2. Disconnect the A52 stop light switch assembly connector.

    3. B00740IC98
      *a

      Front view of wire harness connector

      (to Stop Light Switch Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A52-1 (B) - Body ground Always 11 to 14 V
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A13-2 (STP1) - A52-2 (L) Always Below 1 Ω
      A13-2 (STP1) or A52-2 (L) - Body ground Always 10 kΩ or higher
      A52-3 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG
    OK
  5. CHECK SMART KEY ECU ASSEMBLY


    1. Reconnect the A13 and O6 certification ECU (smart Key ECU assembly) connectors.

    2. Reconnect the A52 stop light switch assembly connector.

    3. B00777TC07
      *a

      Component with harness connected

      (Certification ECU (Smart Key ECU Assembly))

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A13-2 (STP1) - Body ground Brake pedal released → depressed 1 V or less → 9 V or higher
      Result
      Proceed to
      OK
      NG

    OK
    NG