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

DTC Code DTC Name
B2284 Brake Signal Malfunction

DESCRIPTION

The power management control ECU receives brake signal information from 2 sources. It receives a signal from the stop light switch assembly via a direct line, and a signal from the ECM via CAN. If the information from these 2 sources is inconsistent, this DTC will be stored.

DTC No. DTC Detection Condition Trouble Area
B2284 Stop light switch assembly operation information received by the power management control ECU from the stop light switch assembly via a direct line and stop light switch assembly information from the ECM via CAN are inconsistent.

  • Stop light switch assembly

  • CAN communication system

  • ECM

  • Power management control ECU

  • Wire harness or connector

WIRING DIAGRAM

A019KMFE02

INSPECTION PROCEDURE

Note


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

  • Inspect the fuse for circuits related to this system before performing the following 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.

PROCEDURE


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


    1. A019PLOE08
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the F8 connector from the power management control ECU.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F8-1 (AM22) - Body ground Always 9.5 to 16 V
      F8-2 (AM21) - Body ground Always 9.5 to 16 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)

    OK

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


    1. A019PLOE09
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the F8 connector from the power management control ECU.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F8-5 (GND2) - Body ground Always Below 1 Ω
      F8-6 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)

    OK

  3. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - POWER SOURCE AND BODY GROUND)


    1. A019OXLE29
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Stop Light Switch Assembly)

      Disconnect the A79 connector from the stop light switch assembly.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A79-1 (B) - A79-3 (GND) Always 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      A79-3 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK STOP LIGHT SWITCH ASSEMBLY


    1. A019LRUE26
      Text in Illustration
      *1

      Component with harness connected

      (Stop Light Switch Assembly)

      Reconnect the A79 connector to the stop light switch assembly.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A79-2 (L) - A79-3 (GND) Engine switch off, brake pedal not depressed Below 1 V
      A79-2 (L) - A79-3 (GND) Engine switch off, brake pedal depressed 11 to 14 V

    NG

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    OK

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


    1. A019MF3E03
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Management Control ECU)
      *2

      Front view of wire harness connector

      (to Stop Light Switch Assembly)

      Disconnect the F7 connector from the power management control ECU.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F7-11 (STP1) - A79-2 (L) Always Below 1 Ω
      F7-11 (STP1) - Body ground Always 10 kΩ or higher

    3. Proceed to next step based on the inspection result.

      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - POWER MANAGEMENT CONTROL ECU)

    OK

  6. 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

      		 -
      Result
      Result Proceed to
      ON and OFF appear on the screen (for 2GR-FE). A
      ON and OFF appear on the screen (for 1AR-FE). B
      ON and OFF do not appear on the screen (for LHD). C
      ON and OFF do not appear on the screen (for RHD). D

    B

    GO TO SFI SYSTEM (for 1AR-FE) Click here

    C

    REPLACE POWER MANAGEMENT CONTROL ECU (for LHD) Click here

    D

    REPLACE POWER MANAGEMENT CONTROL ECU (for RHD) Click here

    A

    GO TO SFI SYSTEM (for 2GR-FE) Click here