Air fuel ratio sensor
12-02-23, 05:37 PM
#1
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Air fuel ratio sensor
I need a diagram or the schematic for the air fuel sensor bank 1 sensor 1 on a 95 Lexus ES300. I need to find out what the four wires are coming out of the engine harness to the air fuel ratio sensor bank 1 sensor 1 so I can get the right wires to the right pins on the connector going into the sensor cuz I'm replacing the connector cuz it's burnt up now please somebody give me that freaking diagram before I lose my mind I've been searching internet for 3 hours I cannot find it or just tell me the four wires coming off the harness what color they are please holy ****
12-02-23, 05:50 PM
#2
Lexus Fanatic
Someone will need to take a picture for you a wiring diagram is not helpful.
12-05-23, 04:43 PM
#3
Pole Position
Hello,
Share a picture of what you have remaining of the wiring.
It may be more or less possible to establish where each wire goes without the Schematic - the sensor has 4 wires, Pin 1 is a Heater Control from the ECU, Pin 2 is 12V from the Battery, Pin 3 is the Signal Output to the ECU, Pin 4 is Chassis Ground.
To establish two of the wires is pretty easy, turn the Ignition the On position and find a wire that has Continuity to Ground, and the wires that has 12V across those. The rest should be even easier, Pin 3 will have a Shielding wire over it, Pin 1 is the last remaining.
Hope this helps and best of luck!
Share a picture of what you have remaining of the wiring.
It may be more or less possible to establish where each wire goes without the Schematic - the sensor has 4 wires, Pin 1 is a Heater Control from the ECU, Pin 2 is 12V from the Battery, Pin 3 is the Signal Output to the ECU, Pin 4 is Chassis Ground.
To establish two of the wires is pretty easy, turn the Ignition the On position and find a wire that has Continuity to Ground, and the wires that has 12V across those. The rest should be even easier, Pin 3 will have a Shielding wire over it, Pin 1 is the last remaining.
Hope this helps and best of luck!
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Pwrdude (12-06-23)
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