air conditioning diagnostic help

[1996QShip]

Okay Guys, here we go:
I have a 1996 G50 with is only blowing ambient air. I've checked the fuse in the panel with is good. It also blows at the correct speed depending on the setting. It switches the modes properly too. I then did the self diagnoses as directed by the FSM and received error codes: 21 with flashing, 41, and 51.
The question I have is what do you think could be the one problem resulting in the various error codes? I can't see more than one thing going wrong at the same time. looking at the FSM I almost have to think my air mix door motor is bad but I just don't know. Your help and input would be much appreciated as I'm dying of heat here in Louisiana already.
I look forward to your responses

[Infinitiguy19]

Your Ambient Temperature Sensor (Mounted in front of the Condenser and next to the Auxiliary electric fan (HA-60, 1994 Q45 Service Manual) is malfunctioning. Replace with a known good one and do the A/C diagnostic again.

[1996QShip]

Thanks I'll try it. Should I try getting from a parts car or buy a new one?

[1996QShip]

where is the drivers side condenser located. If anybody has a picture of an ambient temp sensor. I would really appreciate it.

[Infinitiguy19]

I have never heard of a ambient temperature sensor failure. They might need to be cleaned to improve their accuracy... Check the wires leading to and from your sensor.

Ambient temp sensor: 27722-66U00: $49.89 (05/10/2011)...I would go with a known good used one.

And no need for a pictures as it is easy to find the sensor just get under the front bumper of the car and look at the AUX fan like I said.


https://picasaweb.google.com/lh/photo/- ... directlink

[Q451990]

What does your display say when you press the "AMB" button on your climate controller? If it says something near the actual outside temperature, I would guess that the sensor isn't your problem.

Heath

[1996QShip]

When I press "amb" button it says -22 degrees. It's actually 71 today. What do I need to clean on the sensor?

[1996QShip]

Cleaned the ambient temp sensor and all ac stuff seems to back to normal. If anything now the ac seems too cold