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  #685  
Old 01-30-2015, 08:29 PM
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Re: Is DPF issue for 2014 CRD fixed now?

Quote:
Originally Posted by Steve1307 View Post
Well I'm glad i left off the detail about the how to do the one for the "Regen status"

I don't know if that one works yet, but it's reading 0 which means it's not currently doing a regen. duh

When the car is doing a regen the Exhaust temps go up significantly so that should be a good indicator of it happening.
Hi Steve,

Thanks for sharing the info, love your work

Do you mind sharing how you are monitoring "regen status"? Also are you using standard PIDs for CAT and Exhaust temp?

I would not mind monitor the same as what you are doing to see what happens when my instant fuel consumption increase, but I'll add instant consumption and log it to see if there is any correlation to a regen occurring.

Cheers

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  #686  
Old 01-30-2015, 08:59 PM
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Re: Is DPF issue for 2014 CRD fixed now?

Thank you for your responses everyone. Will be keeping a keen eye out. Again, my service guy said (as I drove out yesterday after my flash update) I have to watch my stop/starts - my answer was even with my 'stop/starts' why wouldn't it of done a re-gen in my 8 return (16) trips 45min or more in length in the 7 weeks between limp mode then ? No real answer to that just for me to drive in manual mode around home. The Flash also rectified an air-conditioning issue and a cruise control issue (plus the ETC issue) - the other two I have not had any issues with. Samantha.
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  #687  
Old 01-30-2015, 09:07 PM
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Quote:
Originally Posted by Crocko View Post
Thank you for your responses everyone. Will be keeping a keen eye out. Again, my service guy said (as I drove out yesterday after my flash update) I have to watch my stop/starts - my answer was even with my 'stop/starts' why wouldn't it of done a re-gen in my 8 return (16) trips 45min or more in length in the 7 weeks between limp mode then ? No real answer to that just for me to drive in manual mode around home. The Flash also rectified an air-conditioning issue and a cruise control issue (plus the ETC issue) - the other two I have not had any issues with. Samantha.
I would totally disregard everything they have told you. Since when do you have to alter your driving style/street/destination because of the vehicle you are driving. The vehicle obviously has something wrong, what that something is, is any body's guess. We had 1 limp mode, and forced regen, none since. We would be the ones most likely to have them as we predominantly only drive 5 minute trips. A tank gives my wife about 45 days of driving. We have had the regen in progress message twice, and twice it successfully completed the regen whilest traveling our normal routes in traffic. Its seems to me that the regen's seem to be a bit hit and miss.
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  #688  
Old 01-30-2015, 09:35 PM
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Re: Is DPF issue for 2014 CRD fixed now?

Thanks to the info Steve posted I was able to get the DPF full value going in Torque

Now just to get the regen status showing and I'll log this data for a few weeks to see what is going on.

I did a quick 10km round trip and my DPF full value increased by 2%.
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  #689  
Old 01-30-2015, 11:36 PM
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Re: Is DPF issue for 2014 CRD fixed now?

Quote:
Originally Posted by XtRmn8 View Post
Hi Steve,

Thanks for sharing the info, love your work

Do you mind sharing how you are monitoring "regen status"? Also are you using standard PIDs for CAT and Exhaust temp?

I would not mind monitor the same as what you are doing to see what happens when my instant fuel consumption increase, but I'll add instant consumption and log it to see if there is any correlation to a regen occurring.

Cheers
Thanks, no probs

The regen status is also in the Mode 1 PID 8B and is on the 2nd byte "B" and is bitwise.

Bit 0 is Current Regen status 0 = No, 1 = Yes
Bit 1 is Regen Type 0 = Passive, 1 = Active

Next parts i'm assuming relates to the SCR which we dont have. so i'm assuming they are at 0
Bit 2 is NOx adsorber regen 0 = adsorption (not regen), 1 = desorption (regn in progress)
Bit 3 is the Desulfurisation 0 = no , 1 = Yes
Bits 4-7 are reserved so return 0,0,0,0.

I don't know how to read bit 0 or bit 1 by itself, so i just look at the value of byte "B" from 0-255

0000 0 0 00 = 0 ---- no regen
0000 0 0 01 = 1 ---- passive regen (I don't know how the ECU knows this, reducing DPF % maybe?)
0000 0 0 11 = 3 ---- active regen triggered by the ECU.

Mode: 01
PID: 8B
min : 0
max: 255
units : none
equation : B



For the CAT temp on the app I use i just pick it from a list.
Its CAT Temp Bank 1, Sensor 1 which would be. Mode 1, PID 3C
I think there is only 1 sensor so the other 3 CAT temp variable read 0.

The EGT is the standard PID list again from Mode 1, PID 78 which is Bank 1 sensor(s)
I had to manually enter it with the equation.

PID 78 is a bit more complicated than PID 3C because it give 9 bytes instead of only 2 and can have up to 4 temps sensors in the same PID value.

Byte A in indicates which EGT are supported.
Byte B-C is EGT bank1 sensor1 and this is the one i'm displaying at moment.

just like the CAT temps the scaling is from -40 to 6513.5 for deg C.
the equation is similar

Equation: (((B*256)+C)/10)-40.

It looks like there are only 2 temp sensors on the exhaust system itself. EGT1 1 and CAT1 ?
I haven't tested any other variables. Easy to do, same equation but substituting D & E, or F &G, or H & I.

The one i'm looking at EGT 1 1 must be near the turbo as it goes quickly from 100 to 500 C when accelerating and drops quickly lifting off.
The CAT temp is more even so would be the one with some mass around it.

To save crawling under there again, it looks like this.


diagram stolen from factorychyslerparts.com

I don't think there are any more sensors further back


Good idea to look at the instantaneous fuel flow. Might look at that one.

Cheers.
Steve
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  #690  
Old 01-31-2015, 01:38 AM
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Re: Is DPF issue for 2014 CRD fixed now?

Steve,

Gee, u should provide tech consulting service to JA.
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  #691  
Old 01-31-2015, 08:43 PM
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Re: Is DPF issue for 2014 CRD fixed now?

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Originally Posted by mmcrh View Post
Steve,

Gee, u should provide tech consulting service to JA.
Yes, you should. Actually I'm pretty sure that our service techs can do this already. The guy who seemed most switched on described going through a similar process before deciding to replace my DPF. It's often a question of how much they want to tell you, because I think they are all on damage control mode right now. A significant number (Maybe 10-15% of JGC WK2s MY 2014) have this fault, and I think it's giving them major strife.

I decided to leave the OBD Facile and Torque to those in the know. It involves getting an OBD Blue-tooth adapter. If I get more regen. problems, maybe I'll invest in one.

I'll be optimistic for now and believe that the last TSB has fixed it.

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Actually in a recent "highway" drive, I was looking at the proportion of time that the tachometer was in the 1800-2000 rev range. It was really only on the hill sections, so there is not much opportunity for a normal regen if that's what it takes.
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Old 01-31-2015, 10:08 PM
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Re: Is DPF issue for 2014 CRD fixed now?

Hi Steve,

I would like to add my personal thanks as a long term sufferer I hope that monitoring the DPF state will let me know when to go for a fast drive and save me another round of DPF limps.

Fred
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  #693  
Old 01-31-2015, 11:42 PM
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Red face Re: Is DPF issue for 2014 CRD fixed now?

G'day all

I have a MY14 JGC purchased July 2013. I have had a perfect run with it (39,000 k) and have not had one problem till last Sunday when I experienced the dreaded DPF issue with accompanying "limp mode". The EVIC showed message FILTER 100% FULL and the car went into limp mode without warning.

A slow 40k trip to the dealer where the mandatory manual regen burn took place. i too got the usual dealer speel..."too many short runs.... or perhaps it could be poor fuel quality... have you been towing?.. that could cause it." As the result of closely following this thread, I took that advice with a grain of salt and to mean "we haven't got a clue why your car's DPF blocked up."

i have my suspicion that it is a softwear issue and put my experience out there for comment.

Two days earlier I had my auto sparkie fit an anderson plug and during that process he disconnected and removed the battery from the vehicle. after re-fitting the battery all systems worked with the exception of the PASSIVE ENTRY. I got a message on the EVIC requesting SERVICING OF THE PASSIVE ENTRY. The very next day I got the DPF 100% FULL and accompanying LIMP MODE MESSAGE.

Can anyone confirm or deny that removal of the battery may have caused a softwear glitch during re-boot of the computer?

Cheers Brian
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  #694  
Old 02-01-2015, 12:20 AM
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Re: Is DPF issue for 2014 CRD fixed now?

Did your Auto Elec remove any plastic trims in the boot? If so, it is likely that he disconnected one of the passive entry receivers... and the error message purely pertained to this event.

Disconnecting the battery will have nil effect on the DPF system.

Cheers,
Steve
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  #695  
Old 02-01-2015, 12:32 AM
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Re: Is DPF issue for 2014 CRD fixed now?

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Originally Posted by Barboots View Post
Did your Auto Elec remove any plastic trims in the boot? If so, it is likely that he disconnected one of the passive entry receivers... and the error message purely pertained to this event.

Disconnecting the battery will have nil effect on the DPF system.

Cheers,
Steve
You got it in one for the passive entry Steve. Was sort of hoping the DPF issue might be related. Looks as if I join the frustrated DPF mob hoping for a solution. Kind of makes one feel very lucky having not long completed 10,000k towing in remote central oz. Id hate to see this come up at Cameron's Corner with a three tonne van hooked up.

Cheers Brian
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Old 02-01-2015, 12:44 AM
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Re: Is DPF issue for 2014 CRD fixed now?

Well this is a new twist!! Have you been towing? Considering that mine was sold to me for the towing ability I would love to have that in writing.

And what's more I checked out with the owner of an MY13 model, and he had been towing a heavy van, he spoke very highly of its ability and had no problems.

As I have said in an earlier post, both Jeep and the dealers seem to want to blame the customers - you bought poor quality fuel - no I didn't; driving style lots of short runs - no mixture of highway and short runs, some even happened on the highway; now towing - well if anything is going to get it hot, towing will.

Let's hope the December software upgrade fixes it.
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