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SMART ENTRY AND START SYSTEM (for Start Function), Diagnostic DTC:B2274

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DTC Code DTC Name
B2274 ACC Monitor Malfunction
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DESCRIPTION

This DTC is stored when there is a problem in the ACC output circuit. The IG2 circuit is the circuit that goes from inside the main body ECU to the ACC or P/POINT relay.

Tip:

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

DTC No. DTC Detection Condition Trouble Area
B2274 The ACC relay actuation circuit inside the main body ECU or other related circuit is malfunctioning.

  • Driver side junction block assembly (for RHD)

  • Passenger side junction block assembly (for LHD)

  • Main body ECU

  • Wire harness or connector
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WIRING DIAGRAM

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INSPECTION PROCEDURE

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PROCEDURE


  1. Click here

    READ VALUE USING INTELLIGENT TESTER


    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 / Main Body / Data List.

    5. Read the Data List according to the displays on the intelligent tester.

      Tip:

      When using the intelligent tester with the engine switch off, turn on and off any of the door courtesy switches repeatedly at 1.5 second intervals or less until communication between the intelligent tester and vehicle starts.

      Table 1. Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      ACC Relay Monitor Status of ACC Relay Monitor / ON or OFF

      ON: Engine switch on (ACC)

      OFF: Engine switch off

      		 -
      OK
      ON (engine switch on (ACC)) appears on the screen.

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    CHECK FOR DTC


    1. Clear the DTCs (Click here).

    2. Turn the engine switch on (IG).

    3. After 10 seconds have elapsed, recheck for DTCs and check if the same DTC is output.

      OK
      DTC B2274 is not output.

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    INSPECT JUNCTION BLOCK ASSEMBLY (ACC, P/POINT RELAY)


    1. A01CCROE21

      Disconnect the 5A and 5D connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      5D-3 - 5A-4 Always 130 to 235 Ω at 20°C (68°F)
      5D-3 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for RHD) B
      NG (for LHD) C

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    CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - JUNCTION BLOCK ASSEMBLY)


    1. A01CE5ME03

      Disconnect the G48 connector from the main body ECU.

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

      Standard Resistance
      Tester connection Condition Specified Condition
      G48-22 (ACCD) - 5D-3 Always Below 1 Ω
      G48-22 (ACCD) - Body ground Always 10 kΩ or higher
      5A-4 - Body ground Always Below 1 Ω

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    USE SIMULATION METHOD TO CHECKClick here

  6. Click here

    REPLACE MAIN BODY ECUClick here

  7. Click here

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

  8. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU - JUNCTION BLOCK ASSEMBLY)

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    REPLACE MAIN BODY ECUClick here

  10. Click here

    REPLACE PASSENGER SIDE JUNCTION BLOCK ASSEMBLY