whjresq

Hello out there:

I have hot air with AC on. I live in the desert so when outside temp drops to 90-100 its cool not cold air.... my diagnostic sensor readings are no error codes:
1.103
2. 107
3. 112
4. 103
5. 103
6. 228
7. 9-14......while driving on freeway
8. 107
9. No value
10. 0.8
20.6.0
21. 39
22. 114
23. 0
24. 14.3
40. 8
41. 5
42. 248
43. 14

I CLEANED the duo value parts just removing top half and replaced the rubber diafram which was torn.

Because it seems to have freom with increased pressure while driving i am assuming compressor is working. There seems to be change in rpm

Serndipity

You only posted your HVAC system values.

The A/C push button control module self test has 2 modes of operation and is capable of showing both data as well as any stored diagnostic trouble codes (DTCs).

Did you run both?

whjresq

Yes I did. At this time no. A while back yes i think it was 417 or duo valve. I cleaned it and replace inner rubber diaframe which was torn.

just for background this started with auxiliary fan failure off and on which i replaced but it ran hot in traffic meaning less than 120 but hot. Then coolant overflow developed leak, replaced it but its cap was not sealing replaced cap so overheating ceased but intermittently out of the blue it will run hot which i think must be thermostat because it will happen on the freeway.....like I said not consistently ......meaning two three weeks then one day bam....haven't figured that out soni was going to replace thermostat.

I've read that the higher pressure from running hot can damage compressor or other system components.

thanks for your response.

lowphat

How do you access the stored DTC's?

Serndipity

Here are the instructions for retrieving and erasing your HVAC DTC's, directly from the N22 push button control module.

cindyclk

great post serndipity....in addition, be sure to clear the error codes. The compressor is designed to cut out if error code threatens...after you clear error codes, see if things improve...please post results

whjresq

Hello and thanks for the input. There are no DTC error codes for the AC. I also checked with a centech OBD reader which had several codes but none related to the AC
I was hoping the problem would be apparent from the sensor values. There is no cool air. Next suggestion

As to the other codes P0730 incorrect gear ratio. P0715 Input/Turbine Speed Sensor A Circuit; P0410 Secondary Air injection; P0106 Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance

Serndipity

In test step #23, your value is 0, which seems odd.

That step indicates the terminal 58d battery voltage present. Example: 99 would correspond to 99%.

You might want to check all of your HVAC fuses, which you will find in fuse box F1, located in the engine compartment.

The specific fuses to check are #'s 20, 25, 26 and 38.

Suggest checking the fuses as follows:

-Using a multi-meter, probe the both the input and output ends of the fuse, which indicates the presence of voltage being supplied to and through the fuse.

-I would also inspect both the fuse and socket contacts for corrosion buildup, which would cause resistance with the circuit being able to supply high current to the downstream electrics.

lowphat

Thank you Serendipity!

whjresq

The coolant pressure from sensor 7 seems constant while driving so i think i need to make sure the clutch is engaging. I checked the fuses which seem ok but have not taken a voltage meter to check the fuse contacts. I don't know why sensor 23 is 0