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

DTC Code DTC Name
B2274 ACC Monitor Malfunction

DESCRIPTION

This DTC is stored when a malfunction in the ACC circuit is detected. The ACC circuit activates the ACC relay.

Tech Tips

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

DTC Code DTC Detection Condition Trouble Area DTC Output Confirmation Operation
B2274

Malfunction in the ACC circuit of the certification ECU (smart key ECU assembly)(1-trip detection logic*).

Tech Tips

When the voltage at terminal ACCD is not at the standard, the system is determined to be malfunctioning.

  • AM2 fuse

  • ACC relay (Instrument panel junction block assembly)

  • Certification ECU (Smart key ECU assembly)

  • Harness or connector

 Wait 10 seconds after turning the power switch on (ACC) or on (IG), and then wait another 10 seconds after turning the power switch off.

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

  • If there is a malfunction due to the relay being stuck on, the ACC relay does not turn off even though the power switch is off.

  • If there is a malfunction due to the relay being stuck off, the ACC relay does not turn on even though the power switch is on (ACC).

Tech Tips

The power switch can be turned on (IG) and the hybrid control system can be started.

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Tech Tips

Related Data List and Active Test Items
DTC Data List Item Active Test Item
B2274

    Power Source Control

  • ACC Relay Monitor

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WIRING DIAGRAM

A004FY8E03

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the vehicle power switch off, connect the GTS to the vehicle and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry & Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • 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) precaution 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 (POWER SOURCE)


    1. A004FELE01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

      Disconnect the certification ECU (smart key ECU assembly) connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F88-2 (+B) - Body ground Power switch off 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS ORCONNECTOR IN CIRCUIT CONNECTED TOPOWER SOURCE

    OK

  2. CHECK HARNESS AND CONNECTOR (GROUND)

    A004EHSE02
    Text in Illustration
    *a

    Rear view of wire harness connector

    (to Certification ECU (Smart Key ECU Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F88-11 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the F86 connector from the certification ECU (smart key ECU assembly).

    2. Disconnect the 3B connector from the instrument panel junction block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F86-4 (ACCD) - 3B-37 Always Below 1 Ω
      3B-8 - Body ground Always Below 1 Ω
      F86-4 (ACCD) or 3B-37 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC RELAY)


    1. Remove the instrument panel junction block assembly Click here.

      A004G3RE02
      Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -

    2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3E-1 - 3B-13 Auxiliary battery voltage not applied to terminals 3B-37 and 3B-8 10 kΩ or higher
      Auxiliary battery voltage applied to terminals 3B-37 and 3B-8 Below 1 Ω

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

  5. INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A004F4QE01
    Text in Illustration
    *a

    Component with harness connected

    (Certification ECU (Smart Key ECU Assembly))

    1. Reconnect the F86 certification ECU (smart key ECU assembly) connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F86-4 (ACCD) - Body ground Power switch off → Power switch on (ACC) 1 V or less → 8.5 V or higher

    OK

    END (USE SIMULATION METHOD TO CHECK) Click here

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)