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ECM (Engine Control Module) Removal and Installation: Removal

Disconnect negative cable from battery.
Disconnect connectors from ECM as follows.
1. Push lock (1) to release locking of lock lever (2).
2. Turn lock lever in arrow direction until it stops.
  
  Fig 1: Disconnecting Connectors From ECM
  Courtesy of SUZUKI OF AMERICA CORP.
Remove ECM (1) and cover from bracket by removing their mounting bolts (2).

Fig 2: Identifying ECM With Mounting Bolts
Courtesy of SUZUKI OF AMERICA CORP.