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Home >> Toyota >> 2009 >> Tacoma X-Runner >> Repair and Diagnosis >> Engine Performance >> Engine Control System (1GR-FE) >> SFI System >> DTC P0604 Internal Control Module Random Access Memory (RAM) Error >> Inspection Procedure

Inspection Procedure

  1. CHECK DTC 
    1. Clear DTC.
    2. Turn the ignition switch off.
    3. Disconnect the cable from the negative battery terminal and wait for 1 minute.
    4. Connect the negative battery terminal.
    5. Turn the ignition switch to ON.
    6. Check DTC.

      OK: 

      P0604 is not present. 

      NG: REPLACE ECM  (See ECM  )

      OK: CHECK FOR INTERMITTENT PROBLEMS  (See CHECK FOR INTERMITTENT PROBLEMS  )

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