Tools Required
10mm combination wrench

Disconnect the battery
a. Open the front trunk and remove the plastic battery cover in the center near the rear bulkhead. It is
secured with tabs you can turn by hand. Using the 10mm wrench, disconnect the negative terminal.

Please notes:

When the battery is disconnected, the doors, hood, and trunk lock. Although you can manually unlock the doors with the key, you will not be able to open the front hood if you close it after disconnecting the battery. To preclude a problem, open the car’s windows and securely prop open the hood before disconnecting the battery.

Expose the ECU.
a. Open the rear trunk and pull the carpet liner back from the front edge.
b. Locate the ECU mounted on the forward
bulkhead on the driver’s side.

All plugs in this installation are locking units keyed to only fit into the correct connector. Most plugs use a release lever which must be released by depressing a small pin on the rear of the plug just “inside” the lever. The release lever plugs must have the lever rotated “up” away from the plug before they can be inserted into the connector. The release lever must be rotated “down” as the plug
slides into the connector and the locking pin must “click” to ensure the plug is secure. Plug 5 is different and only has a button on the top which must be depressed to release the plug. Plug 5’s button also “clicks” when the plug is correctly positioned.

 

Tips Porsche Boxster 986 1997-04