2008 Lexus IS FFACTORY OEM SERVICE PROCEDURE

Inspection Procedure

NOTE: When replacing the skid control ECU, perform zero point calibration and store system information (See CALIBRATION  ).
  1. CHECK ABS CONTROL SYSTEM 
    1. Clear the DTCs (See DTC CHECK / CLEAR  ).
    2. Start the engine.
    3. Drive the vehicle at a speed of approximately 40 km/h (25 mph) or more for 60 seconds or more.
    4. Check if the same DTC is recorded (See DTC CHECK / CLEAR  ).

      Result 

      RESULT REFERENCE

      Result Proceed to
      DTC (ABS control system DTC) is not output A
      DTC (ABS control system DTC) is output B

    B: REPAIR CIRCUIT INDICATED BY OUTPUT DTC  (See DIAGNOSTIC TROUBLE CODE CHART  )

    A: Go to next step 

  2. RECONFIRM DTC 
    1. Turn the engine switch off.
    2. Clear the DTCs (See DTC CHECK / CLEAR  ).
    3. Start the engine
    4. Drive the vehicle at a speed of approximately 40 km/h (25 mph) or more for 60 seconds or more.
    5. Check if the same DTC is recorded (See DTC CHECK / CLEAR  )

      Result 

      RESULT REFERENCE

      Result Proceed to
      DTC (43) is not output A
      DTC (43) is output B

    B: REPLACE SKID CONTROL ECU  (See REMOVAL  )

    A: CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)  (See DIAGNOSIS SYSTEM  )

Chapter Navigation
Return to Chapter: DTC 43 ABS Control System Malfunction
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.