1999 "EE" 90, 115 FFI, 150, 175 V4, V6 FFI Outboards Service Manual, P/N 787024, Page 58Get this manual
Internal ECU Sensors Five sensors are located inside the ECU; barometric pressure, ECU temperature, alternator 26 volts, battery 12 volts, and ROM verificationSince none are serviceable parts, failure correction would require replacement of the ECU