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Home >> Toyota >> 2008 >> Avalon XLS >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (2GR-FE) - DTC P0171 - P0606 >> DTC P0604: Internal Control Module Random Access Memory (RAM) Error >> Inspection Procedure
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Inspection Procedure

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

      Result 

      RESULT CHART

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

    B : CHECK FOR INTERMITTENT PROBLEMS 

    A : REPLACE ECM  (See ECM )

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