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

DTC Code DTC Name
B2273 Ignition 2 Monitor Malfunction

DESCRIPTION

This DTC is output when there is a problem in the IG2 output circuit, which is from the inside of the power source control ECU to the IG2 relay.

Tech Tips

When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the 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 IG2 relay actuation circuit inside power source control ECU or other related circuit is malfunctioning

  • IG2 relay

  • Power source control ECU

  • Wire harness or connector

WIRING DIAGRAM

A0161TXE02

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 intelligent 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 intelligent tester and vehicle starts.

      Power Source Control
      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 DTC Click here.

    2. Turn the engine switch on (IG).

    3. Depress the brake pedal.

    4. After 10 seconds have elapsed, check if the trouble occurs again.

      OK
      DTC B2273 is not output.

    NG

    REPLACE POWER SOURCE CONTROL ECU

    OK

    USE SIMULATION METHOD TO CHECK Click here

  3. INSPECT IG2 RELAY


    1. A0161LX

      Remove the IG2 relay from engine room relay block No. 2.

    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 terminal 1 and 2 10 kΩ or higher
      3 - 5 When battery voltage is applied to terminal 1 and 2 Below 1 Ω

    NG

    REPLACE IG2 RELAY

    OK

  4. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - IG2 RELAY)


    1. Disconnect the J55 connector from power source control ECU.

      A0161IPE02

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J55-35 (IG2D) - Engine room relay block No. 2 IG2 relay terminal 2 Always Below 1 Ω
      J55-35 (IG2D) or engine room relay block No. 2 IG2 relay terminal 2 - Body ground Always 10 kΩ or higher
      Engine room relay block No. 2 IG2 relay terminal 1 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - IG2 RELAY)

    OK

    REPLACE POWER SOURCE CONTROL ECU