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Home >> Dodge and Ram >> 1987 >> Aries L4-135 2.2L SOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Electronic Spark Control Module >> Description and Operation >> Electronic Spark Advance Computer
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Electronic Spark Advance Computer


The Electronic Spark Advance (ESA) computer, used on some 1985 - 87 models, is programmed to monitor several different component systems. If a malfunction in a monitored circuit is detected often enough to indicate an actual problem, a corresponding ``fault code'' is stored in the computer for display on diagnostic readout tool C-4805. If the malfunction is repaired or ceases to exist, the code will be erased from the computers memory after 30 ignition key on/off cycles.
The diagnostic readout tool can be used to check different modes: the Diagnostic Test Mode, Circuit Actuation Test Mode and Switch Test Mode.


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