Rear 02 Sensor
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Joined: Apr 2006
Posts: 167
From: Oshkosh, Wi
Rear 02 Sensor
Hello, i am working on a 98 maro with a 3.8 single exhaust, i reciently put a cat back on it and need the resistance leavels for the heat and signal wires that go to the ecm for the rear 02, i have plenty of electronic equip to buld my own sim but i just need the values.
Thx Alot
Don
Thx Alot
Don
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Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
The signal wire provides a variable voltage ranging from 0-999mV. The PCM feeds the sensor 450mV, and the O2 difference across the Zirconia membrane adds or subtracts up to 450mV to create the signal the PCM sees.
The heater circuits don't connect to the PCM. The PCM uses an assessment of the time required for the sensors to reach operating temperature as a measure of whether the heaters are working or not.
The heater circuits don't connect to the PCM. The PCM uses an assessment of the time required for the sensors to reach operating temperature as a measure of whether the heaters are working or not.
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