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Home >> Plymouth >> 1988 >> Colt Vista 4WD >> Repair and Diagnosis >> Engine Performance >> System >> MPI System >> Diagnostic Code Identification >> MPI Inspection Test (Using ECI Checker MD998451) >> Output Signal Chart-Step 2
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Output Signal Chart-Step 2

  1. Turn ignition switch to "LOCK" position. Set check switch of ECI checker to "OFF" position. Disconnect White connectors from ECI checker. Connect Green connectors to ECI checker. See Figure . Perform checks according to appropriate OUTPUT SIGNAL CHART-STEP 2. See Figure
  2. If checker shows any deviation from specification, check sensor and related wiring harness. Repair or replace as necessary. After repair, recheck with ECI checker to ensure repair has corrected problem.
  3. Set ignition switch to "LOCK" position. Set check switch of ECI checker to "OFF" position. Remove connectors of ECI checker and harness connector from ECU and body side harness connectors.
  4. Ensure power supply to ECU is disconnected for at least 15 seconds. This will erase memory from ECU. Connect body side harness connectors to ECU. Perform road test to ensure trouble has been eliminated.
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