Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 131 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 Sr. No. Steps Specifications Step 1 Check whether the DP sensor connector is connected properly. Remove and connect again properly - Step 2 Check for continuity between DP sensor connector pins 1, 3, 2 and ECU pins A57, A49, A45 respectively. - Step 3 Check whether the ECU connector is connected properly - Step 4 Check for any damage or bend in ECU terminal pin - Step 5 Check the DP sensor physically for any pin damage or connector damage or pin backout - Step 6 Check for presence of any foreign particles in electrical connector - Step 7 Check whether dummy sensor is fitted for bypassing the control. Remove the dummy sensor. - Step 8 Check for any damage or leakage in the DP tubes. Arrest the leak /rectify the damage - Step 9 Check for any foreign particles in DP hoses. Both rubber and metallic hoses - Step 10 If the problem persists, replace the sensor - Associated Parameters: Parameter Label Description DID Monitoring DPF differential pressure DPF in-out raw differential pressure FE17 “DPF differential pressure” should be greater than or equal to “DPF differential pressure when clean” when engine is running. DPF differential pressure when clean DPF in-out differential pressure when clean FE1F Verification condition: Drive the vehicle in city and highway in engine warmed up condition for 20 mins. Circuit description: The differential pressure sensor measures the pressure drop between two points in the flow pattern. Two points are connected across DPF and pressure difference between these two points helps the ECU to find the soot loaded in the DPF. Circuit Schematic Diagram:
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