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Okay then this wiring harness is 01. The white wire on the engine wiring harness is the B+ or 12 V input to the heater circuit of the sensor. It goes to either one of the heater wires on the sensor. The blue wire with a yellow tracer/line is the wire going to the other heater wire on the sensor. This is the return wire to the computer to turn the heater on. The Brown wire is the ground wire and would go to your gray wire which is the ground wire on the sensor. The black wire is the OX1 voltage input to the engine control computer and would go to the corresponding wire on your sensor. That should do it
Please can you help me interpret this at the O2 sensor end color wise.
The white wire on the engine wiring harness is the B+ or 12 V input to the heater circuit of the sensor. what color is the heater circuit?
The blue wire with a yellow tracer/line is the wire going to the other heater wire on the sensor. This is the return wire to the computer to turn the heater on. HTL wire color on sensor?
The Brown wire is the ground wire and would go to your gray wire which is the ground wire on the sensor. ground wire on sensor color?
The black wire is the OX1 voltage input to the engine control computer and would go to the corresponding wire on your sensor. Ox1 on sensor is what color?
Please can you help me interpret this at the O2 sensor end color wise.
The white wire on the engine wiring harness is the B+ or 12 V input to the heater circuit of the sensor. what color is the heater circuit?
The blue wire with a yellow tracer/line is the wire going to the other heater wire on the sensor. This is the return wire to the computer to turn the heater on. HTL wire color on sensor?
The Brown wire is the ground wire and would go to your gray wire which is the ground wire on the sensor. ground wire on sensor color?
The black wire is the OX1 voltage input to the engine control computer and would go to the corresponding wire on your sensor. Ox1 on sensor is what color?
On the sensor side:
"B+" goes to one of the black wire
"HTL" goes to the other black wire
"E1" goes to the white wire
"OX2" goes to the blue wire
update I was checking the wiring incorrectly. The B+ is 12 Volts. When I do a mockup by connecting the wires to the old sensor in my engine compartment ( O2 sensor cold and loose , not grounded)
the symptom is when I hook up the old my scanner does not get any signal from either sensor on bank one.
I checked the ignition fuses both 1 and 2 they are both good.
How can both sensors on bank one be invisible? Even if sensor one is disconnected wouldn't sensor 2 on bank one still put out a reading?
Does checking a o2 sensor out of the heat stream prevent it from being switched on? So testing a connection to an O2 sensor in my engine compartment is not being switched on? I am just reaching here. Is there anything I can test on sensor 2?
The code means that there is a problem with the heater element circuit of the heated oxygen sensor. The control module monitors how long it take the sensor to warm up and start sending an adequate signal. The code is triggered when the sensor is taking too long to warm up. Water getting inside the heated oxygen sensor connector can caused the heated oxygen sensor fuse to blow. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors. If the sensor and connector are OK, replacing the O2 Sensor 1 usually takes care of the problem
Current amperage in the front heated oxygen sensor heater circuit is out of the normal range. (An improper voltage drop signal is sent to ECM through the front heated oxygen sensor heat
Possible symptoms
Engine Light ON (or Service Engine Soon Warning Light)
Possible higher than usual fuel Consumption
P0135 LEXUS Description
Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. The faster the heated oxygen sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module (ECM).In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.
The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.
I am not a detail methodical person. I so appreciate the information I have received and now I found out for some reason I have been giving a whole host of incorrect information back.
I have actually been going through a major personal issue the night the plug broke.
So here is what I know the wires are the very color rkw77080 has listed. His information is correct and I have been down the wrong rabbit hole.
I am trying to figure whats wrong and what I know for sure with regards to this repair.
My first clue was to zoom into and see a close-up of the plug wires.
I don't drink or smoke anymore so all I can say it must have been I was distracted. Now to figure out with all the colors I have used incorrectly what I know and don't know for sure.
Then I will go in and correct.
Once I am done I will see where I am, what I know and what I don't .
RKW7780 I sure appreciate your help and I am sorry I have made this more difficult.
I am very confident that now I will be able to figure it out.
rkw77080 since you helped the poster you may be able to help me too. My bank 2 sensor 1 has one of the wire burned by geting on to manifold. I tried repairing the wire but there is no signal. Very sometimes when i accelerate very aggressively there is some reading. Due to this my bank 2 is running very rich. I checked the resistance of the sensor from the two black wire terminals and found near 14ohms. Is there any way to check that repair is done ok? Please suggest. I have a gs300 2003
rkw77080 since you helped the poster you may be able to help me too. My bank 2 sensor 1 has one of the wire burned by geting on to manifold. I tried repairing the wire but there is no signal. Very sometimes when i accelerate very aggressively there is some reading. Due to this my bank 2 is running very rich. I checked the resistance of the sensor from the two black wire terminals and found near 14ohms. Is there any way to check that repair is done ok? Please suggest. I have a gs300 2003
06-03-17, 05:38 PM
