2006 Lexus IS 350FACTORY OEM SERVICE PROCEDURE

Check Mode Procedure

  1. DESCRIPTION 
    1. Check mode has a higher sensitivity to malfunctions and can detect malfunctions that normal mode cannot detect. Check mode can also detect all the malfunctions that normal mode can detect. In check mode, DTCs are detected with 1-trip detection logic.
  2. CHECK MODE PROCEDURE 
    1. Make sure that the items below are true:
      1. Battery positive voltage 11 V or more
      2. Throttle valve fully closed
      3. Transmission in the P or N position
      4. A/C switched OFF
        Fig 1: Connecting Intelligent Tester To DLC3
        G04045117Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the engine switch off.
    3. Connect the intelligent tester together with the Controller Area Network Vehicle Interface Module (CAN VIM) to the DLC3.
    4. Turn the engine switch on (IG).
    5. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / CHECK MODE.
    6. Change the ECM to check mode. Make sure the MIL flashes as shown in the illustration.
      Fig 2: Identifying Blinking Pattern
      G04052857Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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