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SMART ENTRY AND START SYSTEM(for Start Function), Diagnostic DTC:B228B

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DTC Code DTC Name
B228B System Voltage or GND Energization Malfunction
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SYSTEM DESCRIPTION

This DTC is stored when there is a malfunction in the certification ECU (smart key ECU assembly) battery power supply circuit or ground circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B228B System Voltage or GND Energization Malfunction A malfunction is detected in the certification ECU (smart key ECU assembly) battery power supply circuit or ground circuit. (1-trip detection logic*)

  • AM2 fuse

  • Wire harness or connector
  • DTC Output Confirmation Operation:

  • Drive the vehicle.

Table 1. Vehicle Condition and Fail-safe Function when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Function when Malfunction Detected
The engine stopped while driving. -
Table 2. Related Data List and Active Test Items
DTC No. Data List and Active Test
B228B -
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

  • When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

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

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

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

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PROCEDURE


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    CHECK HARNESS AND CONNECTOR (POWER SOURCE)


    1. B0070D7C58
      *a

      Front view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

      Disconnect the K62 certification ECU (smart key ECU assembly) connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K62-4 (+B) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

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

  2. Click here

    CHECK HARNESS AND CONNECTOR (GROUND)


    1. B0070D7C59
      *a

      Front view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K62-18 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OK

      END (TEMPORARY CONNECTION FAILURE IS SUSPECTED)Click here

    • NG

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