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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 24 (Theft Deterrent / Keyless Entry) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function) >> DTC B2273: Ignition 2 Monitor Malfunction >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
  1. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3
    2. Turn the engine switch on (IG) and turn the Techstream main switch on
    3. Read the Data List according to the displays on the Techstream

      HINT

      When using the Techstream 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 Techstream and vehicle starts

      Power Source Control 

      POWER SOURCE CONTROL RANGE REFERENCE

      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: Go to step  3

    OK: Go to next Step 

  2. CHECK FOR DTC 
    1. Clear the DTC (See DIAGNOSIS SYSTEM  )
    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  (See HOW TO PROCEED WITH TROUBLESHOOTING )

  3. INSPECT IG2 RELAY 
    1. 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 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      3-5 When battery voltage is not applied to terminal land 2 10 kΩ or higher
      3-5 When battery voltage is applied to terminal 1 and 2 Below 1 Ω
      3. Fig 1: Identifying IG2 Relay Terminal
      G04942983Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE IG2 RELAY 

    OK: Go to next Step 

  4. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - IG2 RELAY) 
    1. Disconnect the J55 connector from power source control ECU.
      Fig 2: Identifying J55 Connector Terminal
      G05754421Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value (s) in the table below

      Standard Resistance 

      RESISTANCE REFERENCE

      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 

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