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Home >> Lexus >> 1996 >> SC 400 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Circuit Tests >> DTC P1600 - ECM Batt Malfunction >> Circuit Description
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Circuit Description

Battery voltage is supplied to BATT terminal at ECM at all times. This circuit is used by diagnostic trouble code memory and air/fuel ratio adaptive control value memory. DTC is set if there is an open in back-up power source circuit. Possible causes are:

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