The condition is "regeneration not inhibited" and the input is LV_DISA_RGN. The LC_INH_RGN is a signal that controls the regeneration of the DPF. I did originally think that the MIL light and DPF light were the same thing, but there is actually a significant difference between the two. Essential Takeaways. 6.6 can't run regenerate dpf - Ask the GM Technician. If this is the case, you can try to run the vehicle at a high idle state long enough to create enough soot. The proper operation of this switch is explained in the OEM Owner's Manual. 2022 ACPI ( 1 PC)Trucks software $143.
Aftertreatment System|. Thank you for the responses on Question 2 (about passive regeneration). More fuel to clean out what was low cetane dirty fuel to begin, It just makes no sense to me at all. Hey guys so I have a 2009 GMC sierra 2500 LMM duramax/allison ext cab 4x4 black. The DPF soot load reading must also be good. They where not designed for the higher g forces as result of the tire swap. The function of this device is to keep the Aftertreatment Diesel Particulate Filter from regeneration. Circuit Description: The OEM truck manufacturer may install a permit switch in the dash or send an inhibit message via the J1939 datalink to the engine ECM. You should always follow the OEM owner's manual for the correct operation of the device. If you've completed these basic checks and still find your DPF regen failing, take a look at this video: Still having problems? There are three types of regenerations to consider: PASSIVE Regeneration. Regen inhibited due to switch between different. It is thus possible to initiate regeneration even when the regenerating system is inhibited.
Failed DOC filter – Also called the Pre-DPF filter. Moderate Soot Load: If your DPF indicator light is flashing yellow, driving at highway speed is no longer enough. It is shown on a diagram on page 21 of the operators manual if you want a picture. The directions on the sun visor say "If so equipped, inhibit switch must be off. " A failed sensor can provide false readings and cause excessive regens because it tells the computers the DPF is full (high pressures) when it's not. Now, I will say that for whatever reason, the filter doesn't seem to clog very quickly in the winter and instead I'm now bouncing off the so many miles regen. Regen regeneration works by capturing Particulate Matter in a wall-flow ceramic filter. Manual regeneration with ability to switch to auto!! - Page 2. A regen inhibit switch is installed in some custom-chassis fire apparatuses. Vehicle speed is zero. Total Members8, 960. VGT turbo operation – You need this operation to work properly for the regeneration process to start. People like myself who don't work our trucks through the winter (I feel pretty guilt using it as my daily driver).
A forced regen tends to burn 1-1. The owner of this shop charges for his expertise and will diagnose the problem quickly. It must be set to logic "1" in order to signal passive regeneration. The time since the last successful regen is displayed under the parked button. This is done to avoid elevated exhaust temperatures, which could be dangerous.
Consider the following cases for how JPRO Professional helps technicians avoid a forced regen when it is not the recommended action: FAULT DESCRIPTIONS. The regeneration strategy can be activated or inactive. It is important to use the Regen switch only when the dash lights indicate that it is time to regenerate the DPF. What Happens if Your Truck Can No Longer Regen? –. CUMMINnSsg INSITEr 8. Faulty temperature sensors – These readings will tell you how the DPF system is operating.
How long should a forced DPF regeneration last? Regen inhibited due to switch. Inhibit regeneration is a process in which the engine's regeneration is prevented by the LC_ENA_STA_RGN or LC_DISA_RGN. Noregon's database of repair information, NextStep Repair, is maintained by ASE-certified master technicians to help technicians of all skill levels follow the correct step-by-step repair procedures. Check out our blog post Face Plugging the DOC Filter. To regenerate the DPF, you need to expose it to heat and time.
That has worked out much better because it's more random. In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. Regen inhibited due to switch between first. Please be sure to read the decal on the roof inside and the owners manual and emmissions insert card for exact procedures. At an average of $23 per hour, employers spent an avoidable $38, 433 in technician pay for these events. Originally posted by Bassman.
To validate the repair, start the engine and let it idle for 1 minute. It stops all regeneration from occuring in the on position. Then the operator must click the button if the switch is not active. This downtime wastes labor hours and occupies a service bay, affecting downtime on trucks awaiting repairs. Inhibit switches are a great way to protect your car. Just enough time for it to get good and hot, but not actually make any significant progress cleaning the filter. These include, but are not limited to, a clogged DPF filter, EGR fault codes, your VGT turbo operation. However, if you do not want to sign up for the protection, you can opt for an ats service instead. It is an exclamation mark with exhaust running through it.
When the regeneration process is halted, the vehicle will go into the RUNNING state. Any help or direction would be greatly appreciated. A NECESSARY REGEN indicates the vehicle was in a regen zone (2-5) where a forced regen is recommended. If the Inhibit Regen switch is on, the regeneration process can't take place. Parked/Stationary regeneration is a form of active regeneration that requires actuation by the driver.
NEXIQ eTechnician 2. They described the feature for Fleet vehicles, vehicles that primarily are in stop and go city traffic, People who use them as there daily drivers. Posted - 01/18/2008: 06:07:00 AM. So the switch doesnt effect that. His best practice is to not hold cars overnight to save money. REPAIR INSTRUCTIONS. The inputs to the AND logic function 42 are the LV_ENA_STA_RGN and LC_DISA_RGN. I've never quite figured it out, it always seems to happen when I exit the highway. They have the expertise and equipment necessary to properly diagnose and repair your vehicle's problems. Hence, the Regen Inhibit Switch is a critical component of the DPF. Regen inhibitors are used to prevent elevated exhaust temperatures from creating safety risks. If you're unsure of what to expect, it is important to talk to your bank before you make an appointment.
When triggered, the LC_INH_RGN switches to logic "1" and stops the on-going passive regeneration. The kenworth dpf regeneration instructions contributed a lot. The process of regeneration can be forced by the use of diagnostic software. After discovering the root cause, detailed repair manuals help guide the technician down the most efficient path to repair the problem. The LC_INH_RGN device will change its value to logic "1" when a request is made. Therefore, it is necessary to interrupt regeneration to ensure that the EVAR will not decelerate.
Pay attention to your CEL (Check Engine Light) as this may disable a DPF regen process. This is what sparked the question on skipping levels. I can not find anything wrong. The original equipment manufacturer (OEM) can install a permit switch in the dash or send an inhibit message via the J1939 data link to the engine control module (ECM).
Edited by - Nick on 10/24/2008 3:18:55 PM. Some manufacturers and engines require the soot level to be above a certain percentage for a stationary/forced regeneration to occur. The PTO on a parked vehicle will not be working while the regeneration process is underway. Member Statistics308, 121. If any sensor is faulty then it will stop the regen process.