Accessing the Ambient Air Sensor 2015

Dm93 · Aug 17, 2021

jbrnigan said: ↑

FWIW..... Not sure about Scan Gauge, but, one of the parameters measured by the Ultra Gauge is outside ambient air temps.
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Scan gauge can too on vehicles where the ambient air temp sensor is used by the PCM and available as a PID but on 2nd gens the sensor is only connected to and used by the A/C amplifier which is not on the CAN bus and can't be accessed via the OBD port.

Williston · Jul 6, 2024

wmgeorge[OP] said: ↑

OK Got Er done, the instructions were great. Install in an hour?? More like 3-4 hours. First you do not need the $14 wire cover it looks fine without it. I plugged in the mirror to the plug in the overhead and just pushed the wires under the lip of the headliner. When removing the cover and handle on the left side, you need a piece of plastic to pry off those screw covers, I used a piece off a Bondo spreader. The screws are 10 mm do not even think about a Phillps, way to tight.

I followed the hood release cable when going thru the firewall. Used a sharp wood lead pencil to make an access point from the engine bay side and then 1/4 ID nylon tube cut at an 45 degree angle, pushed it thru and then guided the taped purple wires inside the tube. In fact I left the tube in to protect the wires. On the top side of the dash, same type of tube to fish the wires down. I used Top Hat crimp connectors, twist the bare wires together, insert and crimp all done inside the car and then put behind the kick plate.

The compass is pretty accurate and I did set the zone the thermometer is also right on! A very worth while addition to the truck. Thanks to Dm93 and the rest of the folks.

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One other surprise feature of the mirror I have that isn't documented is an "Ice" warning in the display that appears when the temperature drops to around 36 degrees. It alternates between the temperature/"ICE" reading for about 40 seconds then returns to the normal temp/comp reading. This was a nice surprise as I have it on my Volvo and a Buick I had. I think the logic there is the road surface is likely colder than the air it 2-3 feet above the road. The auto-dim feature works very well too, even with the privacy glass rear window. The compass is very accurate as well.

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Accessing the Ambient Air Sensor 2015

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