Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 156 of 834 Copyright by TATA MOTORS Ltd. This document must not be used in any w ay, such as copying and redistributing to third parties, w ithout our consent Step 1 If vehicle is not driven as recommended in user manual, DPF filter will be overloaded with soot due to improper DPF regen - Step 2 Check connector of DP sensor are connected properly. Remove and connect again properly - Step 3 Check whether the ECU connector is connected properly - Step 4 Check the DP sensor physically for any damage or leak - Step 5 Check for intake air path leakage. Arrest it, if leaking - Step 6 Check cleanliness of DP sensor hoses. Clean it, if any foreign particles are present - Step 7 Check the Soot load inside DPF using as mentioned below, if soot load is more than (150%). Remove DPF and clean using pressurized air (2bar). Refit CATCON (LNT DPF). Follow DPF cleaning procedure mentioned in service manual. Step 8 Do Service regen of DPF. DP lamp should go off and tool should result proper end of regen Follow DPF regeneration procedure mentioned in service manual. Step 9 Check for visible black smoke in tail pipe during free acceleration. If visible black smoke is seen, DPF brick might have damaged or moved - Associated Parameters: Parameter Label Description DID Monitoring Relative soot accumulation based on diff pressure Soot load inside DPF calculated using DP sensor FE35 Reads above 100% to trigger this fault Verification condition: Drive the vehicle in city and highway in engine warmed up condition for 20 mins. Circuit Description: Diesel particulate filters capture particle emissions through a combination of filtration mechanisms. The collected particulates would eventually cause excessively high exhaust gas pressure drop in the filter, which would negatively affect the engine operation. Therefore, diesel particulate filter systems have to provide a way of removing particulates from the filter to restore its soot collection capacity. This removal of particulates, known as the filter regeneration, can be performed either continuously, during regular operation of the filter, or periodically, after a pre-determined quantity of soot has been accumulated. To ensure that particulates are oxidized at a sufficient rate, the filter must operate at a sufficient temperature.
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