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Home >> Ford >> 1994 >> Aspire Base, 2D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Quick Tests >> Key On, Engine Running (KOER) Self-Test
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Key On, Engine Running (KOER) Self-Test

NOTE: It is necessary to clear codes in memory before performing this test. DO NOT  move throttle during test.

1)  Deactivate self-test. Start and run engine at 2000 RPM for 2 minutes to warm up O2S. Turn off engine and wait 10 seconds.

2)  Restart engine, and activate self-test. Record all service codes displayed. See TROUBLE CODE IDENTIFICATION table. If no codes are present, proceed to SWITCH MONITOR TEST.

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