ENTRY AND START SYSTEM (for Start Function), Diagnostic DTC:B2284, P0504

DTC Code DTC Name
B2284 Brake Signal Malfunction
P0504 Brake Switch "A" / "B" Correlation

DESCRIPTION

This DTC is stored when the cable information of the brake signal and CAN information of the brake signal 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

P0504

The cable information of the brake signal and CAN information of the brake signal are inconsistent.
  • STOP fuse

  • AM2 NO. 2 fuse

  • Stop light switch assembly

  • CAN communication system

  • SFI system

  • Power management control ECU

  • Harness or connector

WIRING DIAGRAM

A010OAFE08

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. A00E9MWE23
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the D111 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
      D111-2 (AM21) - Body ground Always 9.5 to 16 V
      D111-1 (AM22) - Body ground

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


    1. Disconnect the D111 power management control ECU connector.

    2. A00E9MWE24
      Text in Illustration
      *1

      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
      D111-6 (GND) - Body ground Always Below 1 Ω
      D111-5 (GND2) - Body ground

    NG
    OK
  3. INSPECT STOP LIGHT SWITCH ASSEMBLY


    1. A010RNAE05

      Remove the stop light switch assembly Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - 2 Pin pushed 10 kΩ higher
      Pin released Below 1 Ω
      3 - 4 Pin pushed Below 1 Ω
      Pin released 10 kΩ higher

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


    1. Disconnect the D113 power management control ECU connector.

      A010N66E05
    2. Disconnect the A1 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
      D113-11 (STP1) - A1-1 Always Below 1 Ω
      D113-11 (STP1) - Body ground Always 10 kΩ or higher
    4. Reconnect the A1 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
      D113-11 (STP1) - Body ground Brake pedal not depressed Below 1.0 V
      Brake pedal depressed ((Voltage at terminal AM21 or AM22) minus 2.0 V) or higher
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      *2

      Front view of wire harness connector

      (to Stop Light Switch Assembly)


    NG
    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.

      Tech Tips

      If the result is not OK, refer to the ECD system.



    NG
    OK