Computer codes
 

I have a 90 C2 that is setting the following codes in the computer: 15, 31, 32, 41, 43, 44, 45. Can someone tell me what these indicate and what action the shop manual says to repair/replace? These codes all have to do the HVAC system.

Regards,

Steve

I think these are all. Got them from a post on Rennlist.

11=Inside temperature sensor
12=Left mixing chamber temperature sensor
13=Right mixing chamber temperature sensor
14=Evaporator temperature sensor
15=Rear fan temperature sensor
21=Oil cooler temperature sensor
22=Defrost flap motor
23=Footwell flap motor
24=Fresh air flap motor
31=Left mixing flap motor
32=Right mixing flap motor
33=Left heater blower motor
34=Right heater blower motor
41=Condenser blower motor
42=Oil cooler blower motor
43=Rear blower motor speed 1
46=Rear blower motor speed 1
44=Rear blower motor speed 2
47=Rear blower motor speed 2
45=Inside sensor blower motor

You didn't list what you are using to read the codes.

I recall that with the "scantool", the baud rate is slow enough that it displays a number of codes from the CCU. I clear the CCU codes then check again - so far no lasting codes on any of those circuits.

I use Durametric software for scanning. It displays the code and what it is referring, but no info on what to do from there. Such as a troubleshooting guide. Thanks for the help. I will visit the Rennlist forum for more info.

RetiredRider,

were you ever able to find out what it meant? How did you fix the issue you had?

CCU codes
 

I eventually discovered that the codes were for the A/C and fan blower, but did not appear to affect anything. The A/C works fine, plenty of cold air and the heater works as well. So, I just left the codes in the computer. I am not sure why the codes are being set in the first place since everything appears normal. Perhaps someone who has dealt with these specific codes can reply with what action they have taken to keep the codes from coming back.