Electronic Control Unit (Ecu)
Do not attempt to test ECU as permanent damage could result.It possible to check wires for continuity. The ECU should only be judged faulty after compression is checked, ignition system has been tested and found problem free and all other fuel injection components have been thoroughly tested.
NOTE:
AFC electrical systems can be checked by using Electronic Fuel Injection testers prescribed by the manufacturer. Instructions for use of testers must be followed carefully to prevent damage to system.