b. Microprocessor (page 2 of 2)

Position the vehicle on a lift and unscrew the lower retaining bolts.

Disconnect electrical connection and the earth connection. Unscrew upper retaining bolts and remove the control unit.

It is absolutely prohibited to exchange injection control units between different vehicles in order to check their efficiency.

Before replacing an ECU as a result of testing, ensure it is really faulty because when a new ECU is activated, the secret Fiat CODE system code is memorised and this makes the unit completely unusable on other vehicles.