"152" on a 93´Park Avenue.
Does anybody know the meaning of this?

Thank you !!

ParkerD - Heilbronn/Germany

Hi ParkerD.
Here´s what I found (posted by randman1 in the Bonneville section):

That's where the factory service manuals come in handy. Here's what the codes mean:


DTC Description
DTC 10/110 Ambient Temperature Sensor CKT Open or Shorted
DTC 13/113 In-Vehicle Temperature Sensor CKT Open or Shorted
DTC 15/115 LH Solar Sensor Circuit Open or Shorted
DTC 35/135 E & C Data Line Failure With Heater and A/C Control Assembly
DTC 38/138 Serial Data Line Failure With PCM
DTC 40/140 Driver Air Mix Motor CKT Open or Shorted, or Not Calibrated
DTC 48/148 Long Term Freon Loss
DTC 52/152 Keep Alive Memory Lost: Sets With Battery Disconnected
DTC 66/166 Low Freon

NOTE: A number 1 prefix on any diagnostic trouble code indicates a history DTC.

This indicates no freon (more than likely a leak somewhere in the system), and a faulty calibration of an air mixer. The 52 will set if the battery is disconnected and is no big deal. You will need to find and correct the reason for no freon before you can procede.

Mike
(Waghaeusel-Germany)

Does anyone konw how to access the codes on the AC unit. I'm getting some strange behavior and have been told that there should be a way to access the codes by pressing and holding a combination of buttons on the dashboard climate control panel.

Any suggestions?
Steve

This method uses several common commands in all stages of the "menus" :
"HI" = proceed forward
"LO" = move backward
"WARM" = up
"COOL" = down
"OFF" = back one level
"AUTO" = exit ECC diagnostics/override function.

1) With the key in "run"
2) Press"off" and "warm" at the same time on the control head.
3) First, it will check all the segments.
4) Then codes will display.
"00" idicates that no codes are present. A "1" prefix indicates
that the code is history, not current.
5) There are too many codes to list, but look for a 41 or 141 - this is
the passenger side air mix actuator circuit. If this code is present, you
can narrow your diagnostics down considerably. Whatever codes you get,
write them all down and then post what you found here.

When I press 'OFF' and 'WARM' simultaneously all I can see is "EXT TEMP 79%" and "OFF".

any other combination i've tried so far yields mostly the same thing. any other ideas?

BTW - My PA Ultra is a '94. Don't know if that makes any difference.

tia
STeve