Hi Ray,

I don't know if a poor ground can trigger C2304 since the listed possible causes of this DTC are a short to ground, although the pinpoint tests also suggest that a short to battery voltage might also trigger the code. I think the ground in your photo is G24, which is referenced by the Rear Electronic Module. The ASM ground is G17, under the rear seat or carpet on the right hand side:



What have you figured out about your resistance measurement of 1.7 ohms on the rear ECATS supply wires?

Don

 

Thanks Don; I now know where to look for the ASM's Ground.

1.7 ohms is definitely the reading I get plus zero volts? I really cannot envisage a broken wire - They look pristine and those that I cannot yet see (behind the rear seat) are so unlikely to experience flexing etc?
Don, have you ever heard of this Module failing? Because that is all I can imagine has happened here? Also, if I do need to replace the module, does it need a Jaguar dealer to configure it? What is also puzzling is that my code reader shows all shocks as operating normally and my suspension feels unchanged?
Would a continuity test help us decipher the problem?
If I pull the rear seat out and can access the ASM, what do I do next, please?
Don, apologies for all these questions.....Answer when you have nothing better to do!

 

If you pull the seat, do look under the carpet to see if all is well at those points.

 

Its worth checking you’re not suffering any water leaks in that area - there is a TSB detailing all the potential leak points.

 

Thanks Wingrider; Willco....

 

Ta, Cornershop - I will see any potential leaks when I have managed to wrestle the seat out in the 40-50 plus degrees C of my basement car park; however, rain is something we do not see often down here!
Having said all that, we shall see!!

 

Possible bad connection at the ASM, try unplugging and reconnecting plugs.

 

EsRay said I will see any potential leaks when I have managed to wrestle the seat out in the 40-50 plus degrees C of my basement car park;

Damn thats hot!!!!!!!!!!!!!!!!!!!!!!

I have issues doing much anymore in excessive heat.

Thats not heat, thats a friggen oven

 

Thank you Meirion1, gonna go with that today!

 

Well, the seat came out easily but it all looks pristine behind there? Sprayed the connectors with contact cleaner and made sure they are firmly clipped in. No joy. Still C2304. Have tried clearing the code with my iCarsoft LR V1.0 and still,still no no joy

Please, any ideas, anyone?

 

I appear to have more than 10,000 ohms (35,000) and less than 3 volts (0.50) at the male pins CR89 7 (WG) & 8 (WB) inside the ASM (these are the pins stated in Don's DTC at post #14), so the problem must be that (unilaterally & simultaneously) the wires to both my left and right rear shock actuators have shorted???

Please, how do I test these wires for continuity, given that their ends are far apart? UPDATE: Don't know whether this is right or not, but I crocodile clipped some wires together from the CR89 pin 8 (WB) to the WB at the shock actuator connector and I have continuity? However, still shows only 0.700 k ohms with the black probe croc wired to the battery negative terminal?

 

Something common to both, the ground & what else ???

 

Wingrider, I like your logic.....All I need to do now to test it out is to figure out exactly where the Ground is?
I haven't managed to find it yet!

 

If the module is behind the rear backrest, it should be in the area your in, should it not???

 

Thanks.

Gonna look tomorrow. Diagram Don kindly sent me appears to show it under the carpet?

Having said that, I do not hold out much hope for an easy solution; if the ASM Ground is faulty I imagine it would also affect the front shocks and it does not?

My car is still driving beautifully and all I want to do is switch off that accursed fault light before I re-register it?

NOW I understand what drives owners to go Coil-Over!!!!

(Wingrider, on a more positive note, now that my rear seats are ensconced in my living room, I can clean them properly in air conditioned splendour)!

 

Couple of people i know would say, just pull the bulb out.

 

Okay Forum,

The only good thing (apart from it is easy) about removing your back seat to access your ASM in Dubai is that you get to clean it in the luxury of your air conditioned apartment!

The only problem is that I still have no answer to my CATS System Fault C2034, my good lady is starting to question how much room our apartment should be allowed to afford my car and the pile of internal car-parts I am developing is starting to look more valuable on eBay than my entire car!

 

Thats an issue i ran into, an 05 VDP with a badly overheated, ruined, motor.

Two plus hour drive, with a trailer to haul it back, 140+ thousand miles.

Extra set of wheels, plus some other parts, for $1,000

The bigger Jaguar wheels, alone should pay the expense, for it hauling home.

Selling unneeded, or unwanted parts, on the computer.

Could return most if not all your investment.

A whole parts car for that price is tempting, THANKFULLY it is NOT white.

That would be a real problem, as both mine are white.

 

Today no CATS System Fault light at ignition, start-up or put into drive; 10 seconds after I pulled away......CATS System Fault light!

 

Don has confirmed that I can eliminate the ASM Ground as the cause of my CATS System Fault without finding the stud by checking the wire at the pin shown below for resistance (he says as near to zero is desirable) & continuity?


I get 0,002 ohms and I have continuity....So presumably I can rule out a poor Ground?

What is really frustrating and puzzling me is that at the ASM CR89 MALE pins 7 & 8 I get 28,000 ohms and 0.5 volts, at the ASM CR89 Connector (FEMALE) I get 23,000 ohms with the Shock Connector plugged in, yet at the rear shock connectors unplugged I still get the volts, but only 1.7 ohms...Despite the fact that I have continuity in the wire from the ASM to the rear shock??

UPDATE: I disconnected the rear shock connectors and got two different codes. The right rear (which as you know is connected directly to the ASM) has a code for open circuit when unplugged, but the left rear (which passes through black connector TL93 something inside the rear Centre Console on its way to the rear left shock) shows code C1430: