SR20DET test pipe
Raymond A. Kawski
sr20de@epix.net
Wed, 27 Feb 2002 15:51:19 -0600
Probe Dude wrote:
> The O2 sensor is a voltage source, using a fixed resistor to ground won't
> work.
Yes but the ECU just monitors the voltage of the line
it sends power to the Rear O2 on. Adding a resistor, which the
rear o2 is, to the line reduces the voltage.
The 98 ECU has 4 wires for the RearO2 I don't recall how many
are on the pre 98 one. I think 3. Heater, Ground and Sensor.
Hook your DVM to the pin on the ECU for the Rear O2 and
check the voltage.
RK