wiring rear oxygen sensor ...please help!
#1
wiring rear oxygen sensor ...please help!
I am trying to wire in a new rear o2 sensor and was wondering what the original wires go to. I have a black, white, brown, and green wire. Which ones are the heater wires? Ground wire? I know a OEM replacement would be easiest, but my 4runner doesn't have the connector, so I would have to splice it anyway. Any help on this would be appreciated. Thanks!
It's for a 2001 toyota 4runner 3.4L.
It's for a 2001 toyota 4runner 3.4L.
Last edited by yodagirl; 07-18-2009 at 03:51 PM.
#2
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what brand sensor is it? are these wire colors coming off the sensor or the 4runner wiring harness?
im only finding black,black,white and blue
im only finding black,black,white and blue
Last edited by bain; 07-18-2009 at 06:13 PM.
#3
Trying to install a bosch replacement sensor. The wires that I mentioned ( black, brown, green, and white) are what are coming off the 4runner wiring harness, not the replacement part.
Is it possible that the wires have discolored or faded?
Is it possible that the wires have discolored or faded?
#5
The wires on the Bosch replacement part are :white, white, black, and gray. I found a post where on the Bosch part, the white wires are heater wires, the gray is the ground, and the black is the o2 signal wire.
I'm going to assume that my wires have discolored, and should really be black and blue instead of brown and green.
By looking at the pic in the previous post, I'm going to guess that the two black wires are the heater wires, but which one is the signal wire?
I'm going to assume that my wires have discolored, and should really be black and blue instead of brown and green.
By looking at the pic in the previous post, I'm going to guess that the two black wires are the heater wires, but which one is the signal wire?
Last edited by yodagirl; 07-19-2009 at 06:20 AM.
#6
According to my FSM for the '02 4runner the wire colors are:
Green/yel = Heater
White/yel = Heater
Blk = Signal
Brown = Sig Ground
So the Bosch wires should match up to:
Sensor -> Truck
White ->> Green
White ->> White
Black -->> Black
Gray --->> Brown
Green/yel = Heater
White/yel = Heater
Blk = Signal
Brown = Sig Ground
So the Bosch wires should match up to:
Sensor -> Truck
White ->> Green
White ->> White
Black -->> Black
Gray --->> Brown
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