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  • Originally posted by JohnLynn View Post
    Thank you for posting, your dealer seems to know more than most! At the risk of "I told you so" this appears to be what Cuda, myself and several others have suspected, that the regen cycle is controlled by an algorithm rather than the actual state of the DPF % soot level
    It sounds like this could fix the issue although the reason for the ECU acting this way was to prolong the life of the DPF, it seems odd they have decided that it will stand higher temperatures after all?
    Would you mind if I copy/paste this to the Fortuner forum or perhaps provide a link to your post?
    John, I am subscribed to the Fortuner threads so will post over there too. I have posted about using the actual dP across the DPF - it will be difficult as it is a function of a lot of variables, but I'm sure with enough data/testing they can use it as an input.

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    • Thanks for posting, yes as you say the delta pressure is subject to a lot of variables, engine speed, load etc but after monitoring it in torque pro you can see the average rise and fall before and after a regen. Presumably as they already use this method on other vehicles it shouldn't be too hard to introduce it to the 2.8. Being a cynical type I must admit that I raised my eyebrows reading that they developed this algorithm method to extend the life of the DPF but they have now decided that it will be OK anyway??? One other thing that doesn't seem to be addressed in your email from them is the 5th injector. Apart from saying this will no longer keep injecting fuel if the "conditions are not met" (I guess they mean the DPF getting hot enough?) there is no mention of it getting carboned up and needing cleaning frequently.

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      • Looks like the main stream media are beginning to pick this up - I'm sure Toyota aren't happy about getitng this sort of coverage! Only name Hilux, but given time I'm sure the issues with Prados and Fortunas will also get mentioned if not resolved.

        https://www.news.com.au/technology/i...48954b3b51e234

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        • Anyone know how long the DPF change out procedure should take?
          My 2016 2.8 50,000km went in for DPF check Wednesday, did three manual burns and it didn't clear so ordered a replacement DPF for Thursday morning. Job not finished yet (Friday midday), apparently because of after-market modficiation, which I presume is my second battery with Piranha tray.

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          • Originally posted by beatit99 View Post
            Anyone know how long the DPF change out procedure should take?
            My 2016 2.8 50,000km went in for DPF check Wednesday, did three manual burns and it didn't clear so ordered a replacement DPF for Thursday morning. Job not finished yet (Friday midday), apparently because of after-market modficiation, which I presume is my second battery with Piranha tray.
            Even if the battery tray is in the road ... how long does it take to pull the aux battery and remove the tray 30 mins doing it left handed? Jesus they try anything
            2018 VX Prado

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            • Yeah just an excuse I think. Battery was definitely removed not sure about the tray. Got it back Friday arvo so was good part of two days to change it out. They put a new software version on too but I forgot to take note of it.

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              • Called my dealer last week and booked mine in for the ECU upgrade and also asked about a manual DPF burn button:

                "Yes, that’s correct, we started going the recalibrations about a fortnight ago. It’s more involved than simply loading the new calibration on, we have to inspect the condition of the filter itself to determine if it requires replacing, as there’s no point putting the new calibration on if the filter is no good. It’s best to leave the car with us for half a day as it can take up to two hours just to check and obviously longer if it requires a replacement.

                There is some trialling of an install of a manual DPF regen button for Hiluxes but not for Prados and it has to satisfy very strict guidelines for its installation and nor is it an easy install. Parts are on sales stop until data is provided, so it’s not something I can order. It’s basically meant for mining vehicles that never leave the site/underground and never get up to highway speeds and doesn’t affect DPF regeneration when the vehicle is operating at highway speeds."

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                • Got the car back, and they did 2 DPF burns and used one can of DPF cleaner....

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                  • Originally posted by LeadWings View Post
                    Got the car back, and they did 2 DPF burns and used one can of DPF cleaner....
                    One can of cleaner is that not enough or a lot? So did it work?
                    2018 VX Prado

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                    • From what ive seen the cans are huge so one should be enough i suppose

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                      • I have no way of testing the difference - while I can see the differential pressure across the DPF, it is so variable based on speed, power etc I can't see if these is a difference post it being in the shop and the 2 burns. I have asked the service manager why they had to do two regens, Will post if I get a reply.

                        Only thing I will be able to tell is if the regen temps at 110 kph are high enough and how long a regen takes. That probably won't be till end August when I have a long trip planned.

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                        • Asked my service manager about the 2 DPF burns:

                          "Two is standard practice, the first one is a manual regeneration with cleaner, and the second is an forced auto regeneration to simulate on-road driving and the second one is where we measure the difference in temperature sensors to judge the condition of the catalyst. If it’s different by +/- 20 degrees, that one goes in the bin and it gets a new one put on. If it’s clogged, we do another two, one to clean and another one to judge the condition after a second clean. Being recently replaced, the difference in your vehicle was three degrees after the first test, so she’s all happy inside there. Hopefully no more issues and better fuel consumption too!"

                          Note I haven't had my DPF replaced, he got me confused with someone else's car. But looks like mine is OK and the regens have been working (I'm currently at 30,000 km and a lot of that is highway kms). Also interesting they measure temp and not DPF differential pressure (or maybe they measure both and he just didn't mention it)

                          Must admit overall I've been impressed by the service/response I have been getting - I think Toyota have been playing it quite up till now, much to the frustration of both the service people and we in the public after info. Hopefully they will be more open going forward. And the new code has it sorted.

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                          • ​​​ Click image for larger version

Name:	smokeyprado.gif
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ID:	739333 ​​​​​​​14 months and 38,000km later, Prado blowing white smoke due to a blocked DPF. No reasonable person expects a new vehicle to be in a workshop for days at a time to remedy multiple faults. I've lost days on the road due to vehicle issues and lack of support.

                            I've lost all faith in this brand, never again.

                            ​​​​​​​

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                            • I share your pain, it almost seems a case of it's not 'if" but "when" the DPF will fail. It will be interesting if they put a manual burn button into your car.

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                              • Originally posted by Micko2005 View Post
                                I share your pain, it almost seems a case of it's not 'if" but "when" the DPF will fail. It will be interesting if they put a manual burn button into your car.
                                Oh the irony, I traded a 05 LR discovery which I had done over 200,000km with only a couple minor issues, namely the 3 amigos and perished rear air bags at around 150,000km of fault free, stress free driving and touring this great land. People bang on about is brand but I'm really not feeling it...

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