02 sensor wiring questions?
hello, i am finally admitting to defeat and asking about this because it has me stumped.
i have a 92 lx wagon auto with a A6 that i belive the previous owner swapped into the car. i read the lx only had the A1 the ecu was also a pt3 so it having a A6 originally is very unlikely, and the engine harness is all marked as to what plug goes to where so it definately looks like someone had pulled the engine out and replaced it at one time, or at least had everything apart.
my question is in regards to the location of the stock o2 wiring on the lx wagons. i have been to the yard numerous times and looked over at least a dozen cb7's every other auto that i have seen has the 4 wire o2 plug comming off the front harness with the solenoids for the trans.
i cut the loom all the way back to the shock tower when i replaced the distributor and could find no trace of the original 4 wires that should be on that section of the harness, did these wagons have the o2 sensor originally behind the flex pipe, right before the cat like some of the aftermarket headers do? i can find no trace anywhere under the car of the 4 wires for the o2 sensor either.
plan B, if nobody knows where to find this harness my other option and my only choice is to rewire the sensor directly from the ecu. i dont have a problem doing this but it brings up another question
i have been looking over the pinouts for the obd1 and obd0 honda ecus and found that pin A6 is for the heating element for the sensor and that pin D14 is for the heater sensor signal this is for the 2 black wires correct? i cannot find any other reference on the pinouts of where the green and white wire are pinned to. i know the thicker white is the direct output for the o2. the green i THINK i read somewhere that it was tied into the tps? ive rewired a few o2 sensors before but not one like this.
any help would be greatly appreciated
i have a 92 lx wagon auto with a A6 that i belive the previous owner swapped into the car. i read the lx only had the A1 the ecu was also a pt3 so it having a A6 originally is very unlikely, and the engine harness is all marked as to what plug goes to where so it definately looks like someone had pulled the engine out and replaced it at one time, or at least had everything apart.
my question is in regards to the location of the stock o2 wiring on the lx wagons. i have been to the yard numerous times and looked over at least a dozen cb7's every other auto that i have seen has the 4 wire o2 plug comming off the front harness with the solenoids for the trans.
i cut the loom all the way back to the shock tower when i replaced the distributor and could find no trace of the original 4 wires that should be on that section of the harness, did these wagons have the o2 sensor originally behind the flex pipe, right before the cat like some of the aftermarket headers do? i can find no trace anywhere under the car of the 4 wires for the o2 sensor either.
plan B, if nobody knows where to find this harness my other option and my only choice is to rewire the sensor directly from the ecu. i dont have a problem doing this but it brings up another question
i have been looking over the pinouts for the obd1 and obd0 honda ecus and found that pin A6 is for the heating element for the sensor and that pin D14 is for the heater sensor signal this is for the 2 black wires correct? i cannot find any other reference on the pinouts of where the green and white wire are pinned to. i know the thicker white is the direct output for the o2. the green i THINK i read somewhere that it was tied into the tps? ive rewired a few o2 sensors before but not one like this.
any help would be greatly appreciated
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