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: 631 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. P24C2-62: Exhaust Gas Temperature Measurement System – Multiple Sensor Correlation Bank 1 – Exhaust gas temperature for cold start condition 2 (signal compare failure) Overview: DTC Description (User Friendly) Exhaust gas temperature for cold start condition 2 (signal compare failure) ECU Pin Number K047, K050, A056, A055, A075, A074, A013, A012. Customer Symptom MIL ON, CEL OFF. Torque Reduction active, DPF Regeneration Off. Fault Effects (On Vehicle) Torque Reduction Active. Lamp Status (If Any) MIL ON, CEL OFF. Fault Detection Condition (Root cause) If No exhaust temperature sensor detects non plausibility with all other exhaust temperature sensors and non plausibility is detected between few sensor and it not clear which sensor is wrong Normal Operating Condition No fault Probable Trouble Area Wiring Harness connections between Exhaust Temperature sensors (T3 /T4 / T5 / T6 Sensor) and EMS ECU T3/T4/T5/T6 Temperature sensors Engine Management System Healing Condition Rectify the error Clear through diagnostic tool Ignition OFF & ON Component Details: The 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 / Exhaust temperature sensor (T3/T4/T5/T6 Sensor) connector. If found, rectify. 4. Check the wiring harness connections between the Exhaust temperature sensor (T3/T4/T5/T6 Sensor) and EMS ECU. Trouble Shooting: Step Checks IF YES IF NO 1 Check the Electrical Continuity between Exhaust temperature sensor (T3/T4/T5/T6 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 Go to Next Step
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