SMART ENTRY AND START SYSTEM (for Start Function), Diagnostic DTC:B2276

DTC Code DTC Name
B2276 ACCR Signal Circuit Malfunction

DESCRIPTION

This DTC is stored when the ACCR output circuit inside the main body ECU is open or shorted.

Tech Tips

When the main body ECU is replaced with a new one and the cable from 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
B2276 The ACCR output circuit inside the main body ECU or other related circuit is malfunctioning.

  • Main body ECU

  • ECM

  • Wire harness or connector

WIRING DIAGRAM

A01CCXPE57

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Turn the engine switch on (IG).

    3. After 50 seconds have elapsed, recheck for DTCs and check if the same DTC is output.

      OK
      DTC B2276 is not output.

    NG

    CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ECM) Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ECM)


    1. Disconnect the G49 connector from the main body ECU.

    2. Disconnect the A8 connector from the ECM.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G49-3 (ACCR) - A8-13 (ACCR) Always Below 1 Ω
      G49-3 (ACCR) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU - ECM)

    OK

  3. CHECK MAIN BODY ECU


    1. A01CEG8E04
      Text in Illustration
      *1

      Component with harness connected

      (Main Body ECU)

      Reconnect the G49 connector to the main body ECU.

    2. Reconnect the A8 connector to the ECM.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G49-3 (ACCR) - Body ground Brake pedal depressed, shift lever in P, engine switch is pushed once → on (IG) 0.1 to 0.8 V → Output voltage is within 2 V of the voltage measured at AM1 or AM2*.

      Tech Tips

      *: Voltage is output only when the engine is cranking.

      Result
      Result Proceed to
      OK A
      NG (for 2GR-FE) B
      NG (for 2AZ-FE) C

    B

    REPLACE ECM (for 2GR-FE) Click here

    C

    REPLACE ECM (for 2AZ-FE) Click here

    A

    REPLACE MAIN BODY ECU Click here