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Re: Particulate filter error resulting in MIL light
Dronus,
I have a feeling that it is some sort of a signal/communication failure between the ECU and the DPF which is preventing it from going through the regeneration cycle. If this is the case, then the new DPF will have exactly the same problem after a while.
The dealer needs to establish that the regeneration cycle is actually getting triggered before replacing the DPF and that is why I am assuming they're following the procedure of regeneration instead of just replacing your DPF.
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30/Dec/2008, 11:00 am
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Re: Particulate filter error resulting in MIL light
I think you are right Jalal - experience suggests it will be the electromechanical interface - ie sensor(s)
John
--- TL dc i, manual, twilight; bash plate, jaos strut bar, BFGs' on 16x7 rims, factory tow bar & roof bars
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30/Dec/2008, 11:16 am
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Re: Particulate filter error resulting in MIL light
Howdy John,
The exhaust tail pipe is pretty clean, i just went out and rubbed my fingers around the tail pipe and didn't get any black soot on my fingers. However I got a few strange concerned looks form my neighbor who came out right at the wrong time and saw me sitting behind the car with my fingers in the tail pipe *ahem*... lol....
I haven't noticed any black smoke coming out of the exhaust - i did keep an eye out for it yesterday arvo after your post. Unless there was a lot coming out i probably wouldn't notice it anyway through the tinted windows. I could get someone to drive behind me while i accelerate i guess..
When i was in lakeside yesterday i overheard a conversation between a patrol owner and a service tech. It went along the lines of his fuel consumption being higher after fitting a larger diameter exhaust. The tech explained that unless the exhaust gave an adequate back-pressure to the turbo, the turbo would not spin up properly, which in turn would put more onus on the engine to do the work, resulting in higher fuel usage (amongst other things)
I wonder if the opposite is also correct. If my DPF is blocked (or faulty) resulting in a higher back pressure.. would my turbo be doing more work resulting in lower fuel consumption? 6.3 is pretty low...
Wild stab in the dark there, would value your thoughts.
---
Current - '08 T31 Platinum TL Diesel Manual
Mats, Boot Liner, Roofies, Spotties, Tint, Nudgebar, Tow Kit, Bash Plate, Yoko GO12 AT-S, Forum stickers.HiTech Twins, LED Mirrors, Bonnet Protector, LED steps
Old - '04 T30 Ti-L Auto
X-966
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30/Dec/2008, 11:57 am
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Re: Particulate filter error resulting in MIL light
Good Point Jalalski,
I'm guessing that the ECU doesn't log regeneration attempts otherwise they would know that its attempting, and failing. I would have thought that the long run yesterday would have given it ample time to do its thing, and thats why a long run was suggested?
If the service regen needs to be done i guess it needs to be done, i just wanted it logged and acknowledged that any proceedure that results in the engine oil having to be replaced due to the heat generated may cause damage to the engine, and i'd like that noted in the logbook, which they will do, which is good  Especially at 8500km. If the service regen fails i guess we go full circle and they replace the DPF or investigate why its not working. I see both sides
Techlan won get back to me for a while so ill have a read of the service guide
Thanks all for your inputs
Dronus
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Current - '08 T31 Platinum TL Diesel Manual
Mats, Boot Liner, Roofies, Spotties, Tint, Nudgebar, Tow Kit, Bash Plate, Yoko GO12 AT-S, Forum stickers.HiTech Twins, LED Mirrors, Bonnet Protector, LED steps
Old - '04 T30 Ti-L Auto
X-966
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30/Dec/2008, 12:42 pm
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Re: Particulate filter error resulting in MIL light
DOn't think so Dronus - ie turbo doing more work.
I actually think despite the error logs suggesting blockage, the DPF is working ok if you are not seeing a lot soot behind. However I could be wrong - on my wife's Rexton (yes well she likes it) which has a 2.7 turbo diesel with no DPF, one does notice a lot of smoke under v heavy load - I actually had it dyno'd and it puts out the correct kW/nm but hell that unburnt fuel is just going out the back. The whole idea of the DPF is to cut down this unburnt emission.
Therefore I think your engine is running fine - you have not noticed any drop off in power and driveability except for the electronics inhibiting the cruise.
Still an interesting fault!
--- TL dc i, manual, twilight; bash plate, jaos strut bar, BFGs' on 16x7 rims, factory tow bar & roof bars
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30/Dec/2008, 2:12 pm
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Re: Particulate filter error resulting in MIL light
Dronus,
I have read into this a bit further and the entire procedure (including how to initiate regeneration of the DPF by the dealer) is also described here:
quote:
SERVICE REGENERATION
SERVICE REGENERATION : Description INFOID:0000000001530744
Service Regeneration is performed with CONSULT-III to reduce particulate matter in DPF. Service Regeneration
should be performed in the following cases.
• ECM enters fail-safe mode because the amount of particulate matter in DPF reaches the specified level.
NOTE:
When ECM enters fail-safe mode because the amount of particulate matter in DPF reaches the specified
NOTE:
After ECM replacement, go directly to Throttle Valve Closed Position Learning procedure.
Do not perform Throttle Valve Closed Position Learning Value Clear procedure.
level, check whether or not DTC is stored in ECM. In the case of DTC stored, perform the Diagnostic Procedure
for the DTC.
• ECM is replaced.
NOTE:
Based on the signal from sensors ECM measures the amount of particulate matter in DPF and stores the
value in EEPROM (Electrically Erasable Programmable Read Only Memory). When ECM is replaced as
new one, there is a difference between the actual amount of particulate matter and the value stored in new
ECM, because the value stored in new ECM is initialized one. In the case above, ECM can not perform
It clearly states that the ECU adapts to the A/F Sensor 1 to control the regeneration process of the DPF, which means that the dealer needs to trouble-shoot your Air:Fuel Ratio Sensor which may not be giving the correct command to the ECU to start the regeneration process of the DPF and the wrong Air:Fuel ratio could also explain your low fuel reading as it is not being gathered correctly by the ECU.
If your dealer follows the above page exactly, they will find the cause of the problem for sure. All of this should be done under warranty. there is no question about that.
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30/Dec/2008, 2:18 pm
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Re: Particulate filter error resulting in MIL light
Jal, wickid, thanks for finding it, very interesting.
-dronus
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Current - '08 T31 Platinum TL Diesel Manual
Mats, Boot Liner, Roofies, Spotties, Tint, Nudgebar, Tow Kit, Bash Plate, Yoko GO12 AT-S, Forum stickers.HiTech Twins, LED Mirrors, Bonnet Protector, LED steps
Old - '04 T30 Ti-L Auto
X-966
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30/Dec/2008, 2:40 pm
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Re: Particulate filter error resulting in MIL light
Just spoke with Lakeside - Nissan TechLan recommend the service regeneration be performed in the workshop. Its pretty much what Jal mentioned about them having to know if the ECU is polling the DPF regeneration. They will know pretty much straight away if it is working when they do it with the consult forcing it on.
The reason why they change the oil and oil filter after doing this process is because fuel can contaminate the oil. This doesnt normally occur when its done automatically. The service regen is being noted in my log book and is being done under warrenty. I will be on about 9000km by friday, so i might aswell book the 10,000km service while im there!
Tim has pulled some strings and booked me in for this Friday morning and they will do it while i wait. He did offer me a loan car but the procedure would have finished before i would have made it home! Once again excellent service.
Ill post back the results.
Happy New year!
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Current - '08 T31 Platinum TL Diesel Manual
Mats, Boot Liner, Roofies, Spotties, Tint, Nudgebar, Tow Kit, Bash Plate, Yoko GO12 AT-S, Forum stickers.HiTech Twins, LED Mirrors, Bonnet Protector, LED steps
Old - '04 T30 Ti-L Auto
X-966
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31/Dec/2008, 6:20 pm
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Re: Particulate filter error resulting in MIL light
I'm on my phone Internet. Been at Nissan for 4 hours now - the DPF regen has failed 3 times while connected to consult.
Something is definately not working properly... Lots of pol scratching their heads.
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Current - '08 T31 Platinum TL Diesel Manual
Mats, Boot Liner, Roofies, Spotties, Tint, Nudgebar, Tow Kit, Bash Plate, Yoko GO12 AT-S, Forum stickers.HiTech Twins, LED Mirrors, Bonnet Protector, LED steps
Old - '04 T30 Ti-L Auto
X-966
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2/Jan/2009, 12:18 pm
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Re: Particulate filter error resulting in MIL light
Wow - have they suggested any parts replacements yet?
John
--- TL dc i, manual, twilight; bash plate, jaos strut bar, BFGs' on 16x7 rims, factory tow bar & roof bars
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2/Jan/2009, 3:25 pm
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