SMART ENTRY AND START SYSTEM, Diagnostic DTC:B2276

DTC Code DTC Name
B2276 ACCR Signal Circuit Malfunction

DESCRIPTION

The main body ECU will set this DTC if the ACCR signal sent from the ECM is ON for 40 seconds or more.

Tech Tips

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
B2276 ACCR output circuit inside main body ECU or other related circuit is malfunctioning

  • Main body ECU (Instrument panel junction block)

  • ECM

  • Wire harness or connector

WIRING DIAGRAM

A017DSQE64

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK DTC OUTPUT


    1. Delete the DTCs Click here.

      Tech Tips

      After all DTCs are cleared, check if the trouble occurs again 50 seconds after the engine switch is turned on (IG).

    2. Check for DTCs again.

      OK
      No DTC B2276 is output.

    NG

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

    OK

    USE SYMPTOM METHOD TO CHECK Click here

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


    1. Disconnect the D6 ECU connector.

    2. Disconnect the D55 ECM connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D6-3 (ACCR) - D55-13 (ACCR) Always Below 1 Ω
      D6-3 (ACCR) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT MAIN BODY ECU


    1. A017FNXE15

      Reconnect the D6 and D55 connectors.

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

      Standard voltage
      Tester Connection Condition Specified Condition
      D6-3 (ACCR) - Body ground Brake pedal depressed, shift P position, engine switch is pushed once → on (IG) 0.1 to 0.8 V (*1) → output voltage at terminal AM1 or AM2 is -2 V or more.

      Tech Tips

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


    NG

    REPLACE ECM Click here

    OK

  4. CHECK MAIN BODY ECU OPERATION


    1. After replacing the main body ECU with a normally functioning ECU, check that the engine starts. Make sure the brake pedal is depressed and the shift position is P at this time.

    2. Check that the engine switch mode can be changed by pushing the engine switch.

      Tech Tips

      Without depressing the brake pedal, push the engine switch repeatedly. Engine switch mode should turn from off to on (ACC) to on (IG) and back to off. With the brake pedal depressed, push the engine switch repeatedly. Engine switch mode should turn to ENGINE START from any status.

      OK
      Engine starts normally.

    NG

    REPLACE ECM Click here

    OK

    END (MAIN BODY ECU DEFECTIVE)