I recently bought the PLX wideband sensor, M-300 model. www.plxdevices.com


I followed this conection map





I had located the Primary O2 sensor (pin C16) Input
I had located the Primary O2 Heater Control (pin C1) Output


But do you know where is the 02 Heater Ground?? which pin ?

I can't find it I do not know where to the resistor



Here you have a pic of the conectors

 

Connector C: (31P) # 18: GRN/YEL SG2 (Sensor Ground)

Might wanna double check with someone

 

I would check color codes at the factory sensor.

C18: sensor ground 2
C7: sensor ground 1

C19: sensor voltage 1
C28: sensor voltage 2

C11: Secondary O2 heater controller
C1: Primary O2 heater controller

I do not think C18 is correct. I am not sure what sensor these pins are going to. The book is vague here.

Please let us know what you find out. I am buying one of these too.

 

Bump for this good question

 

I am doing a chart with the conection. I got a message fron support where explian easier how to do it.


I will post a doc with all the ECU pins.

I strongly reccomend to check the resistors that the company send you, mine were broken.


BTW the car is not runnig becase the Comptech ESM is broken.

 

Those resistors should cost less than USD$1.00... Yuo can get them in any Home depot/DIY store in your area.... Not sure they have that In Spain.....good luck Juan. Keep us updated....

 

They are hard to find..

I made a conection map, waiting for PLX device approval...

 

PM sent

 

Juan,
after cehcking My M 300... I am not sure that the resistors were included... the only thing that was included was capacitors....

 

Maybe I confused the capacitor with ceramic resistors, they look the same...