2008 Toyota FJ Cruiser RWDFACTORY OEM SERVICE PROCEDURE

Inspection Procedure

HINT:

Read freeze frame data using a Techstream. Freeze frame data record the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

  1. READ OUTPUT DTC (DTC P0604) 
    1. Connect a Techstream to the DLC3.
    2. Turn the ignition switch ON.
    3. Turn the tester ON.
    4. Clear DTC (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 battery negative (-) terminal and wait for 1 minute.
    8. Connect the cable to the battery negative (-) terminal,
    9. Connect the tester to the DLC3.
    10. Turn the ignition switch ON.
    11. Turn the tester ON.
    12. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes.
    13. Read DTCs.

      Result 

      RESULT REFERENCE

      Display (DTC Output) Proceed To
      No output A
      P0604 B

    B: REPLACE ECM  (See REMOVAL  )

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

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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