ECI Inspection Test: Notes

1. Turn Ignition switch to "OFF" position and remove cover from ECU. Remove body side harness connectors "A" (17 poles) and "B" (13 poles) from ECU. On ECI checker, set check switch to "OFF" position and select switch to "A". Connect ECI checker Connector by using ECU Harness Connector to ECU and body harness connectors. See Figure . Place ECI Checker on front passenger's seat.
2. Check output monitor operating condition (on or off) by switching ignition switch from "OFF" to "ON". Monitor operating condition should be as follows: Airflow Sensor - ON, Injector Pulse - OFF, Oxygen Sensor - OFF. Perform checks according to following charts.
   Fig 1: Mitsubishi ECU Harness Connector

   
3. If checker shows any departure from specifications, check corresponding sensor and related electrical wiring. After repair or replacement of defects, recheck with ECI checker to confirm that repaired or replaced part is performing well.
4. Airflow sensor and injector pulse may be inspected by output monitors as well. Set select switch to "B". Normal operation is as follows: Airflow Sensor and Injector are always flashing with check switch at "1" through "12". Oxygen Sensor is flashing at closed loop zone. The flashes will be so short that light will appear to be continuously on.
5. Set check switch of ECI checker to "OFF" position. Set ignition switch to "OFF" position. Disconnect connectors of ECI checker from ECU and body side harness connectors. Connect body side harness connector to ECU. Install ECU cover.