Originally Posted by Ar6entino
I checked under EC and went to wiring diag for Bank 1 and came up with his like before i said but i cant understand that image lol
here it is...
G ..is O2 Signal to ECU (terminal #94, referenced elsewhere in FSM)
B ..is Ground
L/R ..is Power (.. from positive battery post)
GY/L ..(must be for Heater.. doesn't seem like a ground.. it goes to ECU so i think this is how the ECU knows when the Heater is malfunctioning)
i'm not really sure what that "barrel"-looking cylinder is going to ground #F36 ..i believe it means the body of O2 Sensor is grounded via exhaust system??
I had this same guessing game when wiring up my O2Simulator.com electronic O2 sim to my two secondary O2 sensors.
The problem is Nissan, Bosch, & other vendors all have Different verbiage/nomenclature for the 4 wires!
Remember, the wire colors above are on the harness-side going to ECU..
..the harness-side going to O2 Sensor have different color wires.
--Guessing (referring to Bosch Wire Color Reference Table)--
Bosch -> Nissan
Signal Wire = G
Heater Wires = L/R ..and.. GY/L
Ground Wire = B
::edit:: oh.. and refer to JCrow's post for Color decoding.. L=Blue, according to Nissan! ..ok sure..