The cold air became warm yesterday. Codes 11, 14, 24 are displayed, but after checking JTIS I am still confused. The 14 and 24 actions are to refer to PDU. What is that?

 

It's a Portable Diagnostic Unit.

All the faults indicate sensor/signal failures so maybe a fuse or a wiring fault?

 

https://www.jaguarforums.com/forum/a...rror-codes-pdf

Try looking through these, it may help.

 

Thanks guys. I've already been through the code explanations and agree it might be a circuit problem. But "refer to PDU" means nothing to me.

I reset the codes and will take it out this afternoon to see if they repeat. It may be time to break out the wiring diagrams again.

 

After reset the problem went away, blowing cold again. I hope it stays that way.

For todays' trivial fact: the motorized aspirator samples cabin air to control temp. and is behind the little grill next to the valet button on US cars. I undoubtedly disconnected it when installing the Realgauge over a year ago and the code has probably been stored since then.

 

JTIS was intended for use by Jag technicians, so when the saw that they would just hook up the PDU, unfortunately you can't.