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SMART ENTRY AND START SYSTEM, Diagnostic DTC:B2274

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DTC Code DTC Name
B2274 ACC Monitor Malfunction
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DESCRIPTION

This DTC is output if there is a problem in the ACCD output circuit, which is from the inside of the main body ECU to the ACC relay.

Tip:

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

After the main body ECU is replaced, perform the registration procedure for the engine immobiliser system.

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

  • Main body ECU (Instrument panel junction block)

  • ACC relay

  • 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) and turn the intelligent tester main switch on.

    3. Read the Data List according to the displays on the tester.

      Tip:

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

      Table 1. Body:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      ACC Relay Mon 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.

  2. Click here

    CHECK ENGINE SWITCH CONDITION


    1. Check the power source mode changes.


      1. When the key is inside the vehicle and the shift lever is in the P position, check that pressing the engine switch causes the power source mode to change as follows:

        OK
        off → on (ACC) → on (IG) → off

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    CHECK DTC OUTPUT


    1. Delete the DTCs (Click here).

    2. Check for DTCs again.

      OK
      No DTC is output.

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    INSPECT RELAY (ACC RELAY)


    1. A017B6EE23

      Remove the ACC relay 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
      3 - 5 When battery voltage is not applied to terminals 1 and 2 10 kΩ or higher
      3 - 5 When battery voltage is applied to terminals 1 and 2 Below 1 Ω

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


    1. A017C94E36

      Disconnect the D7 connector from the main body ECU.

    2. Disconnect the 1I connector from the instrument panel junction block.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      1I-3 - D7-22 (ACCD) Always Below 1 Ω
      D7-22 (ACCD) or 1I-3 - Body ground Always 10 kΩ or higher

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    CHECK HARNESS AND CONNECTOR


    1. A017CS0E04

      Disconnect the 1A and 1F connectors from the instrument panel junction block.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      1F-10 - Body ground Always Below 1 Ω

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

      Standard voltage
      Tester Connection Condition Specified Condition
      1A-1 - Body ground Always 11 to 14 V

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    GO TO OTHER FLOW CHARTClick here

  8. Click here

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

  9. Click here

    USE SYMPTOM METHOD TO CHECKClick here

  10. Click here

    REPLACE ACC RELAY

  11. Click here

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

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    REPAIR OR REPLACE HARNESS OR CONNECTOR

  13. Click here

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)