You will need a socket «on 10».
1. Disconnect the wire from the terminal «minus» battery.
2. Press the lock of the harness block retainer...
3.... and fold out the latch.
4. Disconnect the block from the J2 connector of the electronic engine control unit.
5. Similarly disconnect the second block from the connector J1 of the block.
6. Press the retainer that secures the electronic unit bracket to the bracket on the battery shelf...
7....slide up and remove the block.
8. If necessary, unscrew the four nuts...
9.... and disconnect the unit from the bracket.
10. Install the electronic engine control unit in the reverse order of removal.