Q501 4 Cylinder MT Application DTC Troubleshooting Data Version: 0.1 Date: 21-Sep-2018 Prepared By: Mithi Prasad, Sarang Kulkarni, Manish Gupta Checked By: Yogesh Jadhav Approved By: Satish Kumar P Page: 745 of 1052 Copyright © TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author. P242B-64: Exhaust Gas Temperature sensor Circuit Range / Performance Bank 1 Sensor 3 – Inlet Diesel Particulate Filter exhaust gas temperature sensor plausibility Overview: DTC Description (User Friendly) Inlet Diesel Particulate Filter exhaust gas temperature sensor plausibility ECU Pin Number A075, A074 Customer Symptom MIL ON, CEL OFF. Torque loss. Fault Effects (On Vehicle) Torque Loss, DPF Regen Off. Lamp Status (If Any) MIL ON, CEL OFF Fault Detection Condition (Root cause) The temperature of sensor at Inlet DPF (T5) position is compared with all other temperature values (T3, T4 and T6 sensor values) and if the value is showing non-plausibility with all other sensor. Then the corresponding DTC is Set Normal Operating Condition No fault Probable Trouble Area Wiring Harness connections between Inlet DPF Temperature sensor and EMS ECU Inlet DPF Temperature sensor Engine Management System Healing Condition Rectify the error Clear through diagnostic tool Ignition OFF & ON Component Details: The inlet DPF temperature sensor is based on a PTC sensitive element, placed inside the sensor body; the resistance decreases/increase as the air temperature increases, according to its specific characteristics. The PTC resistance value, in combination with ECU interface, gives an output voltage proportional to temperature changes. Preliminary Checks: 1. Check whether the customer voice / view about the issue is matching with the fault effects mentioned in above Table. If yes, go ahead with next steps. If not, check for other DTC’s presence. 2. Check whether other customers report similar complaints earlier. If yes, perform the preliminary checks with respect to earlier issue closure. 3. Check for damage of pins / back out of pins at ECU connector / Inlet DPF temperature sensor connector. If found, rectify. 4. Check the wiring harness connections between the Inlet DPF temperature sensor and EMS ECU. Trouble Shooting: Step Checks IF YES IF NO 1 Check the Electrical Continuity between the DPF inlet temperature sensor and EMS ECU. For pin details, refer schematic section below. Go to next step Rectify the wiring harness connections as per the circuit schematic. 2 Are there any pins damaged at EMS ECU Connector Replace the connector or wiring Go to Next Step
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