SMART 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 there is a problem in the IG2 output circuit. The IG2 circuit is the circuit that goes from inside the main body ECU to the IG2 relay.

Tech Tips

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

DTC No. DTC Detection Condition Trouble Area
B2273 The IG2 relay actuation circuit inside the main body ECU or other related circuit is malfunctioning.

  • IG2 relay

  • Main body ECU

  • Wire harness or connector

WIRING DIAGRAM

A01CDRME06

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Main Body / Data List.

    5. Read the Data List according to the display on the intelligent tester.

      Tech Tips

      When using the intelligent tester with the engine switch off, turn on and off any of the door courtesy switches repeatedly at 1.5 second intervals or less until communication between the intelligent tester and vehicle starts.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Code
      IG2 Relay Monitor (Outside) IG2 relay monitor (outer) / ON or OFF

      ON: Engine switch on (IG)

      OFF: Engine switch off

      		 -
      OK
      ON (engine switch on (IG)) appears on the screen.

    NG

    INSPECT IG2 RELAY Click here

    OK

  2. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Turn the engine switch on (IG).

    3. After 10 seconds have elapsed, recheck for DTCs and check if the same DTC is output.

      OK
      DTC B2273 is not output.

    NG

    REPLACE MAIN BODY ECU Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  3. INSPECT IG2 RELAY


    1. A01CDIX

      Remove the IG2 relay from the No. 1 engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 130 to 235 Ω
      3 - 5 When battery voltage is not applied to terminals 1 and 2 10 kΩ or higher
      3 - 5 When battery voltage is applied to terminals 1 and 2 Below 1 Ω

    NG

    REPLACE IG2 RELAY

    OK

  4. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - IG2 RELAY)


    1. Disconnect the G49 connector from the main body ECU.

      A01CBBCE08

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G49-11 (IG2D) - No. 1 engine room relay block IG2 relay terminal 1 Always Below 1 Ω
      G49-11 (IG2D) - Body ground Always 10 kΩ or higher
      No. 1 engine room relay block IG2 relay terminal 2 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU - IG2 RELAY)

    OK

    REPLACE MAIN BODY ECU Click here