SMART 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.

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.

DTC Code DTC Detection Condition Trouble Area DTC Output Confirmation Operation
B2284 The brake signal sent via direct line and the brake signal sent via CAN communication (1-trip detection logic*) do not match.

  • AM2 fuse

  • STOP fuse

  • Certification ECU (smart key ECU assembly)

  • Wire harness or connector

 Connect the cable to the negative (-) battery terminal, release the brake pedal and wait 20 seconds or more. 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 in green). 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.

 -

WIRING DIAGRAM

A01EXSJE01

INSPECTION PROCEDURE

Tech Tips

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

Note


  • When using the intelligent tester with the engine switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the intelligent tester and vehicle begins, or 2) connect the intelligent tester to the vehicle, select the vehicle type under manual mode, and then enter the following menus: Body / Entry & Start / DTC.

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

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

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

  • After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

Tech Tips

Related Data List and Active Test Items
DTC Data List Item Active Test Item
B2284

    Power Source Control

  • Stop Light Switch1


    ABS/VSC/TRC

  • Stop Light SW

 -

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH ASSEMBLY)


    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. Read the Data List according to the display on the intelligent tester.

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

      ON: Brake pedal depressed

      OFF: Brake pedal released

      		 -
      OK
      ON (brake pedal is depressed) and OFF (brake pedal is released) appear on the screen.
      Result
      Result Proceed to
      OK A
      NG (for 2AR-FE) B
      NG (for 2GR-FE) C

    B

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

    C

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

    A

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    A01EW7SE07
    Text in Illustration
    *a

    Rear view of wire harness connector

    (to Certification ECU (smart key ECU assembly))

    1. Disconnect the A43 connector from the certification ECU (smart key ECU assembly).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A43-2 (+B) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE

    OK

  3. CHECK HARNESS AND CONNECTOR (GROUND)

    A01EW7SE08
    Text in Illustration
    *a

    Rear view of wire harness connector

    (to Certification ECU (smart key ECU assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A43-11 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the A43 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the A77 stop light switch assembly connector.

    3. A01ESRYE90
      Text in Illustration
      *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
      A77-1 (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
      A43-18 (STP1) - A77-2 (OUT) Always Below 1 Ω
      A43-18 (STP1) or A77-2 (OUT) - Body ground Always 10 kΩ or higher
      A77-3 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Reconnect the A43 certification ECU (smart key ECU assembly) connector.

    2. Reconnect the A77 stop light switch assembly connector.

    3. A01EYGQE11

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A43-18 (STP1) - Body ground Brake pedal released → depressed 1 V or less → 9 V or higher
      Text in Illustration
      *a

      Component with harness connected

      (Certification ECU (Smart Key ECU Assembly))

    NG

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)