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Inspection Procedure

REPLACE ECM
1. Clear DTC.
2. Turn the ignition switch OFF.
3. Disconnect the battery negative terminal and wait for 1 minutes.
4. Connect the battery negative terminal.
5. Turn the ignition switch ON.
6. Check DTC.
  OK:
  
  P0604 is not present.
NG: REPLACE ECM

OK : CHECK FOR INTERMITTENT PROBLEMS