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Home >> Lexus >> 2017 >> LS 460 Base, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System - Diagnostic Codes (P0300-P1367) >> SFI System >> DTC P0604: Random Access Memory (RAM) [09/2015 - ] >> Procedure
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DTC P0604: Random Access Memory (RAM) [09/2015 - ]: Procedure

  1. CHECK DTC 
    1. Clear DTC (Refer to DTC CHECK / CLEAR [09/2015 - ] ).
    2. Turn the engine switch off.
    3. Disconnect the negative (-) battery terminal and wait for 1 minute (Refer to PRECAUTION [09/2015 - ] ).
    4. Connect the negative (-) battery terminal (Refer to PRECAUTION [09/2015 - ] ).
    5. Turn the engine switch on (IG).
    6. Connect the Techstream to the DLC3.
    7. Turn the Techstream on.
    8. Wait 16 seconds or more.
    9. Enter the following menus: Powertrain / Engine / Trouble Codes.
    10. Check DTC.

      OK

      P0604 is not present.

    Result:  OK

    OK 

    CHECK FOR INTERMITTENT PROBLEMS 

    (Refer to CHECK FOR INTERMITTENT PROBLEMS [09/2015 - ] )

    Result:  NG

    NG 

    REPLACE ECM 

    (Refer to REMOVAL [09/2015 - ] )