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: 963 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. schematic. 2 Are there any pins damaged at EMS ECU Connector Replace the connector or wiring harness Go to Next Step 3 Are there any pins backed out from the EMS ECU Connector Rectify/Replace Connectors Go to Next Step 4 Check whether any of the Exhaust gas temperature sensor (Inlet catalyst – T4 Sensor) pins A056, A055 are shortcircuited to Battery / Ground. Rectify the wiring Harness Connections Go to Next Step. 5 Dis-connect Exhaust gas temperature sensor (Inlet catalyst – T4 Sensor) from vehicle and check as below. At 25 degrees of ambient temperature, measure the resistance across the sensor, it shall be ~ 220 Ohms. Go to next step Call Hotline for assistance in deciding whether Exhaust gas temperature sensor (Inlet catalyst – T4 Sensor) has to be replaced. 6 Fault Persists. Call Hotline for assistance in deciding whether Exhaust gas temperature sensor (Inlet catalyst – T4 Sensor) has to be replaced. Go to next step 7 Fault persists Call Hotline Repeat the above steps for reconfirmation DTC’s confirmation: After rectification, Test Drive the vehicle for 2 KM and ensure that no DTC’s are logged in ECM. Circuit Schematic:
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