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Home >> Mercury >> 1983 >> LN7 RS >> Repair and Diagnosis >> Engine Performance >> System >> 1.6L EEC IV Testing >> Quick Tests >> Key On Engine Off (KOEO) Test
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Key On Engine Off (KOEO) Test

Turn ignition switch on. Reconnect grounded jumper wire to self test input terminal. Observe and record service codes until code 10 is displayed. When more than 1 code is displayed, always repair problems in the order that codes were displayed. DO NOT  move shift lever or clutch during test. Repair codes as follows:

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