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Home >> Toyota >> 2007 >> Avalon XLS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTC P0604 - P2A03 >> DTC P0604 Internal Control Module Random Access Memory (RAM) Error >> Inspection Procedure
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Inspection Procedure

  1. CHECK WHETHER DTC OUTPUT RECURS (DTC P0604) 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the ignition switch on (IG) and turn the tester on.
    3. Clear the DTC (See DTC CHECK / CLEAR ).
    4. Turn the ignition switch off and turn the tester off.
    5. Disconnect the battery negative terminal and wait for 1 minute.
    6. Connect the battery negative terminal.
    7. Turn the ignition switch on (IG) and turn the tester on.
    8. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
    9. Read the DTCs.

      Result 

      RESULT CHART

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

    B: CHECK FOR INTERMITTENT PROBLEMS 

    A: REPLACE ECM 

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