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

Tip:

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 (for ZR Series Engine)

  • ECD system (for 1WW Engine)

  • Power management control ECU

  • Harness or connector

WIRING DIAGRAM

C278452E16

CAUTION / NOTICE / HINT

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.

Tip:

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)

    Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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

    Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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

    1. Disconnect the H70 power management control ECU connector.

    2. Disconnect the A55 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

      H70-11 (STP1) - A55-3 (L)

      Always

      Below 1 Ω

      H70-11 (STP1) - Body ground

      Always

      10 kΩ or higher

      A55-2 (GND)- Body ground

      Always

      Below 1 Ω

    4. Reconnect the A55 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

      H70-11 (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

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. INSPECT STOP LIGHT SWITCH ASSEMBLY

    1. Inspect the stop light switch assembly (Click here).

    REPLACE STOP LIGHT SWITCH ASSEMBLY

    (Click here)

  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.

      Table 1. 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.

      Table 2. Result

      Result

      Proceed to

      OK (for LHD)

      A

      OK (for RHD)

      B

      NG

      C

    REPLACE POWER MANAGEMENT CONTROL ECU

    (Click here)

    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 ZR Series Engine

      • *2: for 1WW Engine

      Tip:

      • for 1ZR-FAE:

        • If it is necessary to refer to the SFI system, refer to the following procedure (Click here).

      • for 2ZR-FAE:

        • If it is necessary to refer to the SFI system, refer to the following procedure (Click here).

      • for 1WW:

        • If it is necessary to refer to the ECD system, refer to the following procedure (Click here).

      Table 3. Result

      Result

      Proceed to

      for ZR Series Engine

      A

      for 1WW Engine

      B

    GO TO SFI SYSTEM

    GO TO ECD SYSTEM