The 1997 Honda Civic EX Charging System incorporates an Electric Load Detector (ELD) which measures load on the charging system. ELD sends signal to ECM which controls the voltage regulator. Adjusting voltage needs allows ECM to reduce mechanical load on engine for better fuel economy. The generator inside uses 8 diodes to rectify current and 3 diodes to supply current to voltage regulator. Charging system voltage is controlled by a voltage regulator which is part of generator. The following wiring diagram apply for 1997 Honda Civic EX Charging System. The charging system consists of: alternator, charging system indicator, electrical load detector, engine powertrain control module (ECM/EPM), relay, fuse, integrated control unit, starter and battery.