I have been battling a persistent rough idle for some time and now have an O2 sensor CEL - sensor #1. I replaced the old sensors with new OEM and the code is still there. The wiring on sensor #1 is a custom job done by a PO that I can't make sense of - 6 wires in the harness instead of 4, with some of them joined together (PO deleted the factory harness connector). SMH
I found this handy diagram in the FSM that makes the wiring clearer, but doesn't explain which color wire from the sensor goes where. The FSM does clearly identifies the location of each of these (OX1, OX2, HT1, HT2, +B, and E1) at the ECU.
The sensor has four wires - two black, one each of white and blue. None of the wires have continuity with each other. The white wire has continuity with the body of the sensor.
Any ideas? Has anyone dealt with this before?
I found this handy diagram in the FSM that makes the wiring clearer, but doesn't explain which color wire from the sensor goes where. The FSM does clearly identifies the location of each of these (OX1, OX2, HT1, HT2, +B, and E1) at the ECU.
The sensor has four wires - two black, one each of white and blue. None of the wires have continuity with each other. The white wire has continuity with the body of the sensor.
Any ideas? Has anyone dealt with this before?