ENTRY AND START SYSTEM (for Start Function), Diagnostic DTC:B2273

DTC Code DTC Name
B2273 Ignition 2 Monitor Malfunction

DESCRIPTION

This DTC is stored when a malfunction occurs in the IG2D output circuit, which is between the integration relay (IG2 relay) actuation circuit inside the main body ECU and the integration relay (IG2 relay).

DTC Code Detection Condition Trouble Area
B2273 The integration relay (IG2 relay) actuation circuit inside the main body ECU or other related circuit is malfunctioning.

  • Main body ECU

  • IG2 MAIN fuse

  • Integration relay (IG2 relay)

  • Harness or connector

WIRING DIAGRAM

A01EPAXE02

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (IG2 RELAY MONITOR [INSIDE])


    1. Use the Data List to check if the integration relay (IG2 relay) is functioning properly.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      IG2 Relay Monitor(Inside) Integration relay (IG2 relay) inner 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 intelligent tester.

    NG

    INSPECT FUSE (IG2 MAIN) Click here

    OK

  2. CHECK WHETHER DTC OUTPUT RECURS


    1. Clear the DTCs Click here.

    2. Turn the engine switch on (IG), wait at least 10 seconds, and check whether DTC B2273 is output.

      Result
      Result Proceed to
      No DTC output A
      DTC B2273 output B

    B

    REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

    A

    USE SIMULATION METHOD TO CHECK Click here

  3. INSPECT FUSE (IG2 MAIN)


    1. Remove the IG2 MAIN fuse from the integration relay.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      IG2 MAIN fuse Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

  4. INSPECT INTEGRATION NO.1 RELAY (IG2 RELAY)

    A01ESHKE02

    1. Install the IG2 MAIN fuse to the integration relay.

    2. Remove the integration relay from the engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1B-8 - 1C-1 Battery voltage applied to terminals 1B-6 and 1B-7 Below 1 Ω
      1B-8 - 1C-1 Battery voltage not applied to terminals 1B-6 and 1B-7 10 kΩ or higher

    NG

    REPLACE INTEGRATION NO.1 RELAY

    OK

  5. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY [IG2 RELAY] - MAIN BODY ECU AND BODY GROUND)

    A01EOQCE03

    1. Disconnect the E2 main body ECU connector.

    2. Disconnect the 1B integration relay connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E2-11 (IG2D) - 1B-6 Always Below 1 Ω
      1B-7 - Body ground Always Below 1 Ω
      E2-11 (IG2D) or 1B-6 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)