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Home >> Plymouth >> 1985 >> Conquest 2.6 H, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> ECI CEC System >> Self-Diagnosis Test
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Self-Diagnosis Test

  1. Turn ignition switch to "OFF" position. On Conquest models connect voltmeter between Self-Diagnosis Output and Ground of diagnosis connector, located in engine compartment.
  2. On Starion models use Diagnosis Harness Connector to connect ECI connector to diagnosis connector located in engine compartment. On ECI checker, set check switch to "6" and select switch to "B".
  3. On all models, turn ignition switch to "ON" position and indication of ECU memory will start. If there is any abnormality in the memory, perform the necessary component repairs. Turn ignition off and disconnect battery negative ground cable for 15 seconds or more then reconnect cable to ensure abnormal code has been erased.
NOTE: Before battery terminals are disconnected, make sure that ignition is off. If terminals are disconnected while engine is running or ignition is on, computer or semiconductors could be damaged.
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