Cadillac SRX First Generation Forum - 2004 - 2009 Discussion, Need a wiring diagram from SM. in Cadillac SRX Forums; Hello, Well I can't pull up the SM right now and need a wiring diagram to finish testing something,
"The air quality sensor recognizes carbon monoxide but is not designed as a safety feature to protect you from carbon monoxide. The air quality sensor is designed to limit your exposure to gasoline exhaust fumes and or diesel exhaust fumes that could enter into the passenger compartment from nearby vehicles for a limited amount of time.
The HVAC control module monitors the outside air quality while in AUTO mode via the air quality sensor assembly. You can activate the air quality sensor on your vehicle, if equipped, by pressing the Auto button on the HVAC module. The air quality sensor is a 5-wire sensor, 1 ignition voltage circuit, 2 ground circuit, and 2 control circuits. There are 2 sensors inside the air quality sensor assembly. A hydro carbon (HC) sensor that is used for detecting gasoline exhaust fumes and a Nox sensor that is used for detecting nitrous oxide, diesel exhaust fumes. The HVAC control module outputs a 5-volt signal on the HC and Nox control circuits and operates in a range between 0-5 volts.'
There's more if you need it.
There are 30 harness routing drawings and they're not real clear. Maybe this will help= airq.pdf
Let me know what else you need. It's great to be retired!
Ok that is the drawing I have as well, so I could wire from each of the modules to the sensor but I was looking to find out where the K14 harness would plug into under the hood and see how many of the K14 wires are there and just not used.
From the look of the drawing they plug in by the fusebox on the right side, I will start there.