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ENTRY AND START SYSTEM, Diagnostic DTC:B2273

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DTC Code DTC Name
B2273 Ignition 2 Monitor Malfunction
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DESCRIPTION

This DTC is output when a malfunction occurs in the IG2D output circuit, which is between the ignition relay No. 2 (IG2) actuation circuit inside the main body ECU and the ignition relay No. 2 (IG2).

DTC Code Detection Condition Trouble Area
B2273 Ignition relay No. 2 (IG2) actuation circuit inside main body ECU or other related circuit is malfunctioning

  • Main body ECU

  • Ignition relay No. 2 (IG2)

  • Harness or connector
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WIRING DIAGRAM

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INSPECTION PROCEDURE

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PROCEDURE


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    READ VALUE USING INTELLIGENT TESTER (IG2 RELAY MONITOR (INSIDE))


    1. Use the Data List to check if the ignition relay No. 2 (IG2) is functioning properly.

      Table 1. Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      IG2 Relay Monitor (Inside) Ignition relay No. 2 (IG2) inner relay monitor/ON or OFF

      ON: Power switch ON (IG)

      OFF: Power switch OFF

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

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    CHECK POWER SWITCH (SWITCH CONDITION)


    1. Ensure the key is inside the cabin.

    2. With the brake pedal released, check that the power source mode changes as shown below each time the power switch is pushed.

      OK
      OFF → ON (ACC) → ON (IG) → OFF

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    INSPECT IGNITION RELAY NO. 2 (IG2)


    1. Remove the ignition relay No. 2 (IG2) from the engine room No. 2 junction 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 applied to terminals 1 and 2 Below 1 Ω
      3 - 5 When battery voltage is not applied to terminals 1 and 2 10 kΩ or higher

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    CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - IGNITION RELAY NO. 2 (IG2))


    1. Disconnect the L12 main body ECU connector.

    2. Remove the ignition relay No. 2 (IG2) from the engine room No. 2 junction block.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      L12-11 (IG2D) - Ignition relay No. 2 (IG2) relay terminal 1 Always Below 1 Ω
      Ignition relay No. 2 (IG2) relay terminal 2 - Body ground Always Below 1 Ω
      L12-11 (IG2D) or ignition relay No. 2 (IG2) relay terminal 1 - Body ground Always 10 kΩ or higher

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    REPLACE MAIN BODY ECU

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    USE SIMULATION METHOD TO CHECKClick here

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    GO TO ENTRY AND START SYSTEM (POWER SOURCE MODE DOES NOT CHANGE)Click here

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    REPLACE RELAY

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    REPAIR OR REPLACE HARNESS OR CONNECTOR