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Home >> Scion >> 2010 >> tC Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P0441-02A00) & Circuit Tests) >> SFI System >> DTC P0604: Internal Control Module Random Access Memory (RAM) Error >> Procedure

DTC P0604: Internal Control Module Random Access Memory (RAM) Error: Procedure

  1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0604) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to the ON position.
    3. Turn the Techstream on.
    4. Clear the DTC. Refer to DTC CHECK / CLEAR .
    5. Turn the ignition switch off.
    6. Disconnect the battery negative terminal and wait for 1 minute.
    7. Connect the battery negative terminal.
    8. Turn the ignition switch to the ON position.
    9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
    10. Read the DTCs.

      Result

      Display (DTC output) Proceed to
      P0604 A
      No output DTC B

    B → See step   2 

    A → See step   3 

  2. CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS 
  3. REPLACE ECM. Refer to  REMOVAL 
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