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

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DTC Code DTC Name
B2284 Brake Signal Malfunction
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DESCRIPTION

This DTC is stored when there is an inconsistency between the circuit between the main body ECU and stop light switch, and the CAN communication signal between the main body ECU and ECM.

DTC No. Detection Condition Trouble Area
B2284 The circuit between the main body ECU and stop light switch, and the CAN communication signal between the main body ECU and ECM are inconsistent.

  • Main body ECU

  • Stop light switch

  • STOP fuse

  • Harness or connector
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WIRING DIAGRAM

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INSPECTION PROCEDURE

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PROCEDURE


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    READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH)


    1. Use the Data List to check if the stop light switch is functioning properly.

      Table 1. Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Stop Light SW Stop light switch/ON or OFF

      ON: Brake pedal depressed

      OFF: Brake pedal released

      		 -
      Table 2. Result
      Result Proceed to
      Display on the intelligent tester does not change according to brake pedal operation A
      Display on the intelligent tester changes according to brake pedal operation B

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    INSPECT FUSE (STOP)


    1. Remove the STOP fuse from the engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      STOP fuse Always Below 1 Ω

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    INSPECT STOP LIGHT SWITCH


    1. Disconnect the A30 stop light switch connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - 2 Stop light switch pin not pushed Below 1 Ω
      3 - 4 Stop light switch pin pushed Below 1 Ω
      1 - 2 Stop light switch pin pushed 10 kΩ or higher
      3 - 4 Stop light switch pin not pushed 10 kΩ or higher

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    CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND STOP LIGHT SWITCH)


    1. Disconnect the 2B main body ECU connector.

    2. Disconnect the A30 stop light switch connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A30-2 - Body ground Always 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      2B-22 (STP) - A30-1 Always Below 1 Ω
      2B-22 (STP) or A30-1 - Body ground Always 10 kΩ or higher

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    REPLACE MAIN BODY ECU

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    REPLACE MAIN BODY ECU

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    REPLACE FUSE

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    REPLACE STOP LIGHT SWITCHClick here

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    REPAIR OR REPLACE HARNESS OR CONNECTOR