HEGO Sensor Terminals HEGO SIGNAL PWR SIG HTN 6ND Ems/Manes EGO/HEGO Electrical Tests 'I'III Oondlllont Tan leh If M EGO/HEGO SIGNAL lo Key all, alsoonnecl EGO sensor connector Approxlmalely 0.55 volts EGO sensor may be faulty comml unit Connect DMM bemeen EGO SIGNAL wire and negalive () ballery terrnlnal Englne all normal operating temperature 1 EGO/HEGO SIGNAL to Key 01f, disconnect EGO sensor connemor Voltage drops and E60 sensor may be Ioulty control unit Connecl DMM between EGO SIGNAL wire uctuates and negallve () battery lerrnlnal -Englne al normal operating lemperahure Create vaouum leak (dleconnect vacuum nose to intake manifold) HEGO heater element Key all, disconnect HEGO sensor connector Approximalely 6 ohms at HEGO healer element faulty -Connect DMM between KEV POWER wire room temperature and POWER GROUND a! sensor connector PWH Key all. dlsconnecl HEGO sensor connector 10 volts or greater Check hamm wiring and grounds tanned DMM between PWR wire and GROUND at vehicle conneclor Key On