Here is the question. A Cat System warning came on out of the blue. Checked the plugs on the shocks. All ok. Measured voltage at the plug with engine running...12 volts. With engine off at the plug 5 volts. The car is charging fine.. Is this a "time for a new battery"?

 

When you get that 5V what is the voltage across the battery? (To within 0.1V)

 

Info for you.

 

Thanks so much for the list. I get to see what we are looking at. I do think the battery is toast. Replacing it.

 

The battery was checked. showed 5 volts sitting and then 12 volts when running. I think the problem is battery. New battery on the way. I'll advise if this is the culprit. It also tossed a a P0731 code too out of nowhere. Motorman gave me the PDF to study if a battery doesn't cure this pox.

 

Re-check your charging voltage once your new battery is in place; 12 volts is too low a reading and your alternator may be on the way out too...

 

The code reader is saying this: "LH front damper actuator drive circuit; open circuit" Is that the connector or something else? The code is C1424. The list you gave me says unplugged or a solenoid.. Where is the solenoid located? I am just not familiar with that part. Thanks.

 

The battery was replaced with a new one. The code is C1424. the code says open circuit or solenoid. I need advice from motorman about where the solenoid is located and how to check the plug.

 

Sounds like you have a bad CATS front strut?
Don't know if they are still available or not?
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.
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The electrical guide has COMPONENT LOCATIONS with the schematics.

 

I've been studying the guide. I think I have more questions than answers. I'll plug along with it. The guide is 149 pages and takes a bit of time to find everything.

Thanks.

 

They are Bilstein shocks. Still available. It would about the same price to dump the cats system and replace all 4 wheels with non dampening products. There is a thread on how to do it. First, I have to travel to the people's house on Saturday and start looking for the obvious. This car has never had a code of any kind and all of a sudden. You know the rest.

 

The solenoid IS the damper. (internal)

 

Thanks for your help. The issue is Mr. Bilstein, the damper. The way I tested was to first check the new battery with engine off 12.43 Volts. Start engine and test. 13.23 volts. Then turn off engine and unplug damper to test plug. Turn on key and test for voltage. The plug was working fine. Re-plugged damper and cleared all codes. Started and drove car. No codes at first. Shut down engine and restarted. C1424 code came back. The decision is to order a new Bilstein and make the repair or replace all four shocks and springs and disable the system. That is not my call. Not my Jag. Either way, the problem will be solved in short order.

 

Motorcam, I’m having the same CATs issue where it’s suggestion circuits could be open. My errors stem from installing lowering springs. IDS software isn’t allowing me to clear the code either. Not sure why
im going to purchase coilovers.. I guess I’ll just live with a CATs system code on my dash.

 

Suppose the codes are true. That would be why you can't clear them.

Test to see if they are true! Stop using IDS until you know.

 

Can you help explain to me how to test if the circuits are open??

 

Post 14 ?

 

Thanks

 

That post checks you have voltage at the damper connector from the ADRC (Damper control module) which is a good start.

He also needs to check the resistance across each damper to check they are not open circuit.

This has been suggested several times....

The codes he has are open circuit on three of the damper circuits.