silinteg90

i have a 95 gsr...so im driving and the cel comes on..o2 sensor bad..bought a bosch universal heated 4 wire..NOW HEAR THIS!..i jack up the car..looking up at the wires and they are all ghetto wrapped and hangin..1 blue..1 green..2 black coming out of the o2 sensor..im like huh? doesnt look right...harness side is still intact..o2 side is hacked! so now the harness side has the 4 wires..1 red/white..i think 1 green..1 orange/black..and 1 yellow black..am i correct? i cant really see that clear..but now i finally take out the o2 sensor..i read the side of the thing...ITS SAYS TOYOTA on it!! WTF!!!!! now i have a problem..i have the new o2 with 2 white..1 grey and 1 black..they say black is the signal wire..so that goes to white/red right? grey is ground..what wire does that go to? now 2 white for heated..where do those go? can anyone PLEASE HELP!! i need my car ASAP..thanks!!

JimBlake

My list says this...

white/red is the signal from the O2 sensor.
green/blue is the ground for the sensor signal.

yellow/black is the power side of the heater circuit; should have battery voltage.
orange/black is the ground side of the heater circuit, this goes to the ECU.

About the sensor, the 2 white wires should be the heater, it doesn't matter which is which. So your new sensor has information saying the black wire is the signal? Then that one connects to the white/red one on the harness.

silinteg90

thanks jim..ill try it today..