SMART ENTRY AND START SYSTEM, Diagnostic DTC:B2273

DTC Code DTC Name
B2273 Ignition 2 Monitor Malfunction

DESCRIPTION

This DTC is output if there is a problem in the IG2D output circuit, which is from the inside of the main body ECU to the IG2 relay.

Tech Tips

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

After the main body ECU is replaced, perform the registration procedure for the engine immobiliser system.

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

  • Main body ECU (Instrument panel junction block)

  • IG2 relay

  • Wire harness or connector

WIRING DIAGRAM

A017CUPE03

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG) and turn the intelligent tester main switch on.

    3. Read the Data List according to the displays on the tester.

      Tech Tips

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

      Body:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      IG2 Relay Mon1 Status of IG2 relay monitor (outer) / ON or OFF

      ON: Engine switch on (IG) (IG2 relay is ON)

      OFF: Engine switch off (IG2 relay is OFF)

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

    NG

    INSPECT RELAY (IG2 RELAY) Click here

    OK

  2. CHECK ENGINE SWITCH CONDITION


    1. Check the power source mode changes.


      1. When the key is inside the vehicle and the shift lever is in the P position, check that pressing the engine switch causes the power source mode to change as follows:

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

    NG

    GO TO OTHER FLOW CHART Click here

    OK

  3. CHECK DTC OUTPUT


    1. Delete the DTCs Click here.

    2. Check for DTCs again.

      OK
      No DTC is output.

    NG

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

    OK

    USE SYMPTOM METHOD TO CHECK Click here

  4. INSPECT RELAY (IG2 RELAY)


    1. A017B6EE23

      Remove the IG2 relay from the engine room relay block.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      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

  5. CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK - MAIN BODY ECU AND BODY GROUND)


    1. Disconnect the D6 ECU connector.

      A017DGWE02

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

      Standard resistance
      Tester Connection Condition Specified Condition
      Engine room relay block IG2 relay terminal 1 - D6-11 (IG2D) Always Below 1 Ω
      D6-11 (IG2D) - Body ground Always 10 kΩ or higher
      Engine room relay block IG2 relay terminal 2 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE ROOM RELAY BLOCK - MAIN BODY ECU AND BODY GROUND)

    OK

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)