Front Lambda sensor wiring problems. Help please.
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Front Lambda sensor wiring problems. Help please.
Can anyone please help me get the wiring right for the front lambda sensor on my 2005 wrx.
My new sensor (from a hawk sti, i think) has the same colour wires as my old one (2 black, 1 blue and 1 white) but the plug is a slightly different shape so i have wired it into the old plug but i can't get it to work. Keeps throwing cel for o2 sensor.
The connections on the car's plug are 1 black, 1 black with red stripe, 1 white and 1 yellow.
I've tried a few combinations but i can't figure out what wires to connect.
My new sensor (from a hawk sti, i think) has the same colour wires as my old one (2 black, 1 blue and 1 white) but the plug is a slightly different shape so i have wired it into the old plug but i can't get it to work. Keeps throwing cel for o2 sensor.
The connections on the car's plug are 1 black, 1 black with red stripe, 1 white and 1 yellow.
I've tried a few combinations but i can't figure out what wires to connect.
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Oh dear. Thats not what i wanted to hear.
I wired it all up the same as the previous sensor to start with but when that didn't work i tried
black-black/red
black-black
white-white
blue-yellow
as that seemed the most logical. but no joy.
I hate electrics.
I wired it all up the same as the previous sensor to start with but when that didn't work i tried
black-black/red
black-black
white-white
blue-yellow
as that seemed the most logical. but no joy.
I hate electrics.
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I am pretty certain i have it wired up correctly know but its still throwing a CEL.
Sorry if its a stupid question but can anyone tell me how i can check if i have damaged the ecu wiring or if the sensor is knackered?
Sorry if its a stupid question but can anyone tell me how i can check if i have damaged the ecu wiring or if the sensor is knackered?
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Checked the voltages at the plug and got this:
From ecu
black/red = 2.7v
yellow = 11.9v
they must be heater gnd and +ve
white = 3.8v
black = 3.8v
signal wires for ecu
The signal wire from the sensor reads a constant 3.8v when the engine is running at cold or warm idle. I take it that means its knackered?
From ecu
black/red = 2.7v
yellow = 11.9v
they must be heater gnd and +ve
white = 3.8v
black = 3.8v
signal wires for ecu
The signal wire from the sensor reads a constant 3.8v when the engine is running at cold or warm idle. I take it that means its knackered?
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