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Home >> Ford >> 1990 >> Festiva L Plus, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Key On/Engine Off (KOEO) Self-Test
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Key On/Engine Off (KOEO) Self-Test

NOTE: DO NOT depress throttle during KOEO self-test.

1)  This is a test of electronic engine control system, conducted with power (voltage) applied and engine not running. Activate self-test and record all codes displayed.

2)  Erase codes and repeat self-test. Diagnose only codes that occur during repeat self-test. See SERVICE CODE REFERENCE  . If no codes are present, proceed to KEY ON ENGINE RUNNING (KOER) SELF-TEST.

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