Operation CHARM
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Ford Truck
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1987
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Aerostar L4-140 2.3L SOHC
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Repair and Diagnosis
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Instrument Panel, Gauges and Warning Indicators
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Driver/Vehicle Information Display
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Description and Operation
Driver/Vehicle Information Display: Description and Operation
If a condition exists where
speedometer module
cannot read odometer memory from non-volatile electronic memory, the word ERROR will display in the odometer area.