2009 Toyota Avalon LimitedFACTORY OEM SERVICE PROCEDURE

Inspection Procedure

  1. READ OUTPUT DTC (DTC P0606) 
    1. Connect Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the tester ON.
    4. Clear DTCs (See DTC CHECK/CLEAR  ).
    5. Turn the ignition switch off and turn the tester off.
    6. Disconnect the tester.
    7. Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.
    8. Connect the cable to the negative (-) battery terminal.
    9. Connect the tester to the DLC3.
    10. Turn the ignition switch to ON.
    11. Turn the tester ON.
    12. Select the following menu items: Powertrain/Engine/Trouble Codes.
    13. Read DTCs.

      Result 

      RESULT CHART

      Result Proceed to
      No output A
      P0606 B

      B: REPLACE ECM (See  REMOVAL   ) 

      A: CHECK FOR INTERMITTENT PROBLEMS (See  CHECK FOR INTERMITTENT PROBLEMS   ) 

Chapter Navigation
Return to Chapter: DTC P0606 ECM/PCM Processor
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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.