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Home >> Toyota >> 2011 >> Tundra Base, 4.0 U >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (1GR-FE) (Diagnostic Codes P0418-P1605) >> 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 WHETHER DTC OUTPUT RECURS (P0604) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine and ECT / Trouble Code.
    5. Read the DTCs.
      RESULT

      Result Proceed to
      P0604 is output A
      No DTC is output 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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