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 an input malfunction occurs in the ACC relay cut input signal circuit inside the certification ECU (smart key ECU assembly).

Tech Tips

When the battery cable is disconnected and reconnected, the power source returns to the mode it was in before the battery cable was disconnected.

DTC No. DTC Detection Condition Trouble Area DTC Output Confirmation Operation
B2276 When an input malfunction occurs in the ACC relay cut input signal circuit inside the certification ECU (smart key ECU assembly) (1-trip detection logic*)

  • Certification ECU (smart key ECU assembly)

  • SFI system

  • Wire harness or connector

 Engine start operation is performed.

Vehicle Condition when Malfunction Detected Fail-safe Function when Malfunction Detected

  • ACC is not turned off during cranking.

  • The start assembly turns slowly.

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Related Data List and Active Test Items
DTC No. Data List Item Active Test Item
B2276 - -

WIRING DIAGRAM

A004IYJE02
*1 Certification ECU (Smart Key ECU Assembly)

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the engine switch off to troubleshoot:

    Connect the GTS to the DLC3 and turn a courtesy light switch on and off at 1.5-second intervals until communication between the GTS and vehicle begins.

  • The entry and start system uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting Click here.

  • Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Entry Function) Click here.

  • After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR


    1. Disconnect the D40 and D48 certification ECU (smart key ECU assembly) connectors.

    2. Disconnect the A35 ECM connector.

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

      Standard Resistance
      Tester Condition Connection Specified Condition
      D40-28 (ACCR) - A35-32 (ACCR) Always Below 1 Ω
      D48-11 (GND) - Body ground Always Below 1 Ω
      D40-28 (ACCR) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Reconnect the D40 and D48 certification ECU (smart key ECU assembly) connectors.

    2. Reconnect the A35 ECM connector.

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

      A004HLJE01
      Text in Illustration
      *a

      Component with harness connected

      (Certification ECU (Smart Key ECU Assembly))

      		 - -
      Standard Voltage
      Tester Condition Connection Specified Condition
      D40-28 (ACCR) - D48-11 (GND)*1 With the brake pedal*1 or clutch pedal*2 depressed, the engine switch is pressed and held (starter on) → After approx. 1 sec. has elapsed, the engine switch is released (starter off) 2 V or less → 9 V or higher

      • *1: for Automatic Transmission

      • *2: for Manual Transmission


    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPLACE ECM Click here