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Home >> Ford >> 2022 >> Transit Connect Titanium, Gas/Ethanol >> Repair and Diagnosis >> External Pages >> Different car >> Section 509 (Engine Controls - Diagnostic Methods (Diesel)) >> Quick Test Description >> Key ON Engine OFF (KOEO) Self-Test

Key ON Engine OFF (KOEO) Self-Test

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The KOEO self-test is a functional test of the PCM carried out with the ignition ON and the engine OFF. This test checks that all inputs and outputs (circuits, sensors, regulators, relays, and solenoids) connected to the PCM are electrically operating without a concern.

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