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  #673  
Old 01-30-2015, 01:41 AM
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Re: Is DPF issue for 2014 CRD fixed now?

We also have had no Active Regen message on the EVIC. (Steve1307, I know you have me down as a positive regen happening but I think you must have misinterpreted my posts).

MY14 Overland (Build date - April 5th 2013 so an early build), 42,000kms now, 18 months of ownership and no DPF issues.

On occasion I detect a burning smell from the rear but that is because I have to stop half-way up to the house and open/close a gate (engine still running) so I am behind the vehicle still running but in park, when I notice it.

RRT 14-104 was applied (unasked for) at the 40,000 service.

QPR39 is right. It's just a case of waiting to see whether this TSB has corrected the issue.

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  #674  
Old 01-30-2015, 04:33 AM
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Re: Is DPF issue for 2014 CRD fixed now?

Quote:
Originally Posted by Barboots View Post
The self filling DPF. Only available from Jeep.

I wondered about that too, but everything else he said rang true. The only thing that sprang to mind was the fact that it's a ceramic material. In my experience, high temperature ceramics are not all that good with conditions of high humidity, and maybe there was some blockage due to moisture ingress that caused sintering, which in turn increased the initial Delta P, making it more susceptible to soot blockage by reducing the DPF capacity.

So yes, you could call it self filling in a way. It fills quicker because the capacity is reduced.

What do you reckon? spin or a possible explanation? If it's a ceramic fibre DPF, then it could just be possible. Does anybody have the spec on the DPF?

For the record - build date on my Cherry Red GC Overland was August 2014. Purchase date was 29 October 2014.
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  #675  
Old 01-30-2015, 05:04 AM
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Re: Is DPF issue for 2014 CRD fixed now?


T'day Jim you have won yo'self a fully paid poziss'n in the Jeep soivess team of yer choosin'. Yer gonna get ta spin them pesky customers a nice ol' line o'crap fer yo'self.





Nahhhh... to be fair it sounds plausible Jim. I'm just a shit-stirrer and can't help myself.

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  #676  
Old 01-30-2015, 05:09 AM
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Re: Is DPF issue for 2014 CRD fixed now?

I'm going to look for that OBD Facile App. I have an Android phone.

From the US Diesel Supplement*, but not in any Australian documentation:

Exhaust Filter XX% Full Safely Drive at Highway Speeds—

"This message will be displayed in the Electronic Vehicle Information Center (EVIC) if the exhaust particulate filter reaches 80% of its maxi
mum storage capacity. Under conditions of exclusive short duration and low speed driving cycles, your diesel engine and exhaust after-treatment system may never reach the conditions required to cleanse the filter to remove the trapped PM. If this occurs, the “Exhaust Filter XX% Full Safely Drive at Highway Speeds to Remedy” message will be displayed in the EVIC. If • Exhaust Service Required — See Dealer Now — This this message is displayed, you will hear one chime to assist in alerting you of this condition. By simply driving your vehicle at highway speeds for up to 20 minutes, you can remedy the condition in the particulate filter system and allow your diesel engine and exhaust after-treatment system to cleanse the filter to remove the trapped PM and restore the system to normal operating condition."

*2014 Jeep Grand Cherokee Owners Manual Diesel Supplement, page 24.
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  #677  
Old 01-30-2015, 05:24 AM
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Re: Is DPF issue for 2014 CRD fixed now?

Quote:
Does anybody have the spec on the DPF?
Talk to Bosch. They make really good dishwashers and washing machines - not so sure about CRD systems. (kidding)

Quote:
MultiJet II's Bosch-made injectors can manage up to eight highly precise injections per combustion event. Bosch also supplies the system's high-pressure pump, sensors and engine control unit in addition to the vehicle's emission system, which includes the diesel particulate filter and selective catalytic reduction system.
Above quote taken from here: (January 2013 report):

Bosch Announces Clean Diesel Technology On 2014 Jeep Grand Cherokee -- FARMINGTON HILLS, Mich., Jan. 24,*2013 /PRNewswire/ --
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  #678  
Old 01-30-2015, 06:29 AM
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Re: Is DPF issue for 2014 CRD fixed now?

Quote:
Originally Posted by JimQldAust View Post
I'm going to look for that OBD Facile App. I have an Android phone.
Yes that's the only app i could find with more of the OBD parameters that seem to be supported by the Jeep. ( For me, the app keeps dropping the connection to my OBD dongle so its a bit of a pain)

The "Normalized DPF % " is one of the standard parameters (not a Jeep proprietary one), so i'm waiting to see if it is actually the one used by the jeep.

Its not on this Wikipedia page either: OBD-II PIDs - Wikipedia, the free encyclopedia.
It's not the first time wikipedia has failed me.

I managed to work out the codes for that parameter it so now i've entered it as custom PID item on a "dashboard" on another more stable app.

The DPF data is accessed with Mode 1 - PID 8B which gives 7 bytes of data.
The first byte "A" gives the info of which of the other 6bytes are supported.

2nd one, byte "B" is the current Regen status and SCR status in bitwise form.

3rd one , byte "C" is a value which is a calculated value to display as a percentage.
Quote:
Originally Posted by standard SAE J1979
DPF_REGEN_PCT shall indicate the normalized DPF loading, time, distance, drive cycles or other criteria before the next DPF regen where 0% means the DPF is clean (a regen just occurred) and 100% means the DPF is fully loaded. When there are multiple criteria to trigger a regen, the one that is closest to triggering the regen shall be displayed.
The byte range is from 00000000 to 11111111 which is 0 - 255 in decimal.

if we are scaling it from 0-100% the equation i used is: C*100/255

Some apps like "Torque" will let you add your own custom PIDs if you know the address and the scaling equation.

I entered it as a custom in my app like this:
Name: DPF % full
Mode: 01
PID: 8B
min: 0
max: 100
units : %
Equation: C*100/255.

This displays a percentage which matches OBD facile.

my Dashboard display looks like this


As you can see it's filling up 28% earlier this week it was 16%.
I'm assuming that Jeep scales from 0-100% for their EVIC. maybe they think 120% full is a valid number.
Waiting for it to get to 80% or 100%. see what happens
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  #679  
Old 01-30-2015, 06:41 AM
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Re: Is DPF issue for 2014 CRD fixed now?

Quote:
Originally Posted by SJandL View Post
Talk to Bosch. They make really good dishwashers and washing machines - not so sure about CRD systems. (kidding)

Above quote taken from here: (January 2013 report):

Bosch Announces Clean Diesel Technology On 2014 Jeep Grand Cherokee -- FARMINGTON HILLS, Mich., Jan. 24,*2013 /PRNewswire/ --

The local JeepAust supplied reverse camera certainly isn't a Bosch
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  #680  
Old 01-30-2015, 06:56 AM
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Re: Is DPF issue for 2014 CRD fixed now?

Quote:
Originally Posted by Steve1307 View Post
The local JeepAust supplied reverse camera certainly isn't a Bosch
No, but the DPF is a Botch.
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  #681  
Old 01-30-2015, 07:12 AM
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Re: Is DPF issue for 2014 CRD fixed now?

Some alarming stories on this thread (if you have Facebook)

https://www.facebook.com/jeepaustralia/posts/632148416845088


One poster nearly got rear-ended by a semi when the Jeep went into limp mode. Another almost got stranded in a remote part of Alaska with no mobile coverage.

I hope that the latest TSB works.
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  #682  
Old 01-30-2015, 07:36 AM
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Re: Is DPF issue for 2014 CRD fixed now?

Quote:
Originally Posted by JimQldAust View Post
Some alarming stories on this thread (if you have Facebook)

https://www.facebook.com/jeepaustralia/posts/632148416845088


One poster nearly got rear-ended by a semi when the Jeep went into limp mode. Another almost got stranded in a remote part of Alaska with no mobile coverage.

I hope that the latest TSB works.
The guy in Alaska posted in this thread #254.
He lives in Skagway, a small town squished onto the coast with a steep twisty mountain road up to civilisation in Canada. (I've been there on a cruise and up the WhitePass railway, spectacular scenery)

Customer service told him that Jeep were going to suspend sales of WK2 diesel into remote areas of AK. Don't know if they did.

Later that month he said he cancelled his order for a Dodge1500 deisel and was going to sell his JGC



There's a couple of other familiar names on that facebook list including "dixonf" and "Benno" to the rescue at the end there, pushing the software update. Seriously, Jeep should be paying him.
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  #683  
Old 01-30-2015, 07:36 AM
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Re: Is DPF issue for 2014 CRD fixed now?

Quote:
Originally Posted by Steve1307 View Post

The DPF data is accessed with Mode 1 - PID 8B which gives 7 bytes of data.
The first byte "A" gives the info of which of the other 6bytes are supported.

2nd one, byte "B" is the current Regen status and SCR status in bitwise form.

3rd one , byte "C" is a value which is a calculated value to display as a percentage.


The byte range is from 00000000 to 11111111 which is 0 - 255 in decimal.

if we are scaling it from 0-100% the equation i used is: C*100/255

Some apps like "Torque" will let you add your own custom PIDs if you know the address and the scaling equation.

I entered it as a custom in my app like this:
Name: DPF % full
Mode: 01
PID: 8B
min: 0
max: 100
units : %
Equation: C*100/255.
Steeeeve!! My brain hurts
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  #684  
Old 01-30-2015, 07:53 AM
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Re: Is DPF issue for 2014 CRD fixed now?

Quote:
Originally Posted by Qpr39 View Post
Steeeeve!! My brain hurts
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.
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