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Home >> Chevrolet >> 2000 >> Prizm Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 1.8L >> Diagnostic Tests >> DTC P1600: Control Module Long Term Memory Reset >> Circuit Description
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Circuit Description

Battery voltage is supplied to PCM with ignition on or off for use by PCM keep-alive memory and air/fuel ratio adaptive control valve memory. DTC will set when no battery voltage is present at PCM battery positive voltage circuit. When DTC sets, MIL will illuminate. PCM will record operating conditions at time of failure and store information in freeze frame buffer.

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