ENTRY AND START SYSTEM, Diagnostic DTC:B2274

DTC Code DTC Name
B2274 ACC Monitor Malfunction

DESCRIPTION

This DTC is output when a malfunction occurs in the ACCD output circuit, which is between the D-ACC relay actuation circuit inside the main body ECU and the D-ACC relay.

DTC Code Detection Condition Trouble Area
B2274 D-ACC relay actuation circuit inside main body ECU or other related circuit is malfunctioning
  • Main body ECU

  • Harness or connector

WIRING DIAGRAM

A01GMZ4E06

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (D-ACC RELAY MONITOR)


    1. Use the Data List to check if the D-ACC relay is functioning properly.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      ACC Relay Monitor D-ACC relay monitor/ON or OFF

      ON: Engine switch on (IG)

      OFF: Engine switch off

      -
      OK
      When the engine switch is turned on (IG), ON is displayed on the tester.

    NG
    OK
  2. CHECK ENGINE SWITCH (SWITCH CONDITION)


    1. Ensure the key is inside the cabin.

    2. Check that the power source mode changes as shown below each time the engine switch is pushed.

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

    NG
    OK
  3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BODY GROUND)

    A01GJQHE03

    1. Disconnect the L13, DF and DA main body ECU connectors.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      L13-22 (ACCD) - DA-19 Always Below 1 Ω
      L13-22 (ACCD) or DA-19 - Body ground Always 10 kΩ or higher
      DA-40 - Body ground Always Below 1 Ω
      Standard voltage
      Tester Connection Condition Specified Condition
      DF-1 - Body ground Always 11 to 14 V

    NG
    OK