Wiring schematic for front O2 sensors
Thread Starter
Melting Slicks
Joined: Aug 2006
Posts: 2,167
Likes: 11
From: Powell TN
Cruise-In VIII Veteran
Wiring schematic for front O2 sensors
I've searched and can't find the wiring for the front O2 sensors (the flat plug, not the square one).
Does anyone care to add some colors to this?
- O2 sensor output
- O2 sensor ground
- heater +
- heater -
I guess the only two that really matter are the O2 sensor + and -, because the heater doesn't matter which way they hook up, right?
Does anyone care to add some colors to this?
- O2 sensor output
- O2 sensor ground
- heater +
- heater -
I guess the only two that really matter are the O2 sensor + and -, because the heater doesn't matter which way they hook up, right?
Instructor
Joined: Sep 2005
Posts: 170
Likes: 1
From: Newcastle OK
The 2 brown wires are your grounds, and I believe the white one is your O2 output while the purple is the O2 heater wire, although I may have that backwards (I haven't looked in a while). Stick a voltmeter probe on either wire with the key on; the O2 output will be < 1V, while the heater wire should be around 12V.
HTH,
Brent
HTH,
Brent
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From: Fort Wayne IN
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Pinout should be as follows:
D = Power
C = Ground
B = Primary O2 Signal
A = Redundant O2 Signal
I use the same 4 wire O2's to convert the 1 wire non-heated stuff over and only wire in d,c, and b as above and they work fine. The only "heater" wiring is the power/ground wires.
D = Power
C = Ground
B = Primary O2 Signal
A = Redundant O2 Signal
I use the same 4 wire O2's to convert the 1 wire non-heated stuff over and only wire in d,c, and b as above and they work fine. The only "heater" wiring is the power/ground wires.
Thread Starter
Melting Slicks
Joined: Aug 2006
Posts: 2,167
Likes: 11
From: Powell TN
Cruise-In VIII Veteran
The 2 brown wires are your grounds, and I believe the white one is your O2 output while the purple is the O2 heater wire, although I may have that backwards (I haven't looked in a while). Stick a voltmeter probe on either wire with the key on; the O2 output will be < 1V, while the heater wire should be around 12V.
HTH,
Brent
HTH,
Brent
Pinout should be as follows:
D = Power
C = Ground
B = Primary O2 Signal
A = Redundant O2 Signal
I use the same 4 wire O2's to convert the 1 wire non-heated stuff over and only wire in d,c, and b as above and they work fine. The only "heater" wiring is the power/ground wires.
D = Power
C = Ground
B = Primary O2 Signal
A = Redundant O2 Signal
I use the same 4 wire O2's to convert the 1 wire non-heated stuff over and only wire in d,c, and b as above and they work fine. The only "heater" wiring is the power/ground wires.
I am using my wideband as my narrowband also.
- I have to put a resistor between the two heater wires so the car thinks there is still a narrowband O2 hooked up and doesn't throw any codes.
- I have to run a wire that carries a narrowband signal from the wideband to the O2 sensor wire that goes to the PCM .
So, my resistor goes across the two browns and the narrowband wire goes to the purple. Sound right?
Thanks for the help guys.
