Circuit Description
Battery voltage is translated to 5 V in ECM back-up circuit. The voltage is supplied to keep DTC memory, values that ECM has learned to control engine, etc. in ECM even when ignition switch is turned OFF.
Battery voltage is translated to 5 V in ECM back-up circuit. The voltage is supplied to keep DTC memory, values that ECM has learned to control engine, etc. in ECM even when ignition switch is turned OFF.