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: 618 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. 3. Check whether the O2 sensor is physically damaged. If so, call Hotline for assistance. 4. Loose / damaged connections between O2 sensor and EMS ECU? Rectify wiring harness connections as per circuit schematic. 5. Back out of pins at Oxygen sensor connector / EMS ECU? If so, rectify / replace connectors. Trouble Shooting: Step Checks IF YES IF NO 1. Check for any other faults presence Rectify them by following their rectification procedure Go to next step 2. Check for wiring harness continuity between the O2 sensor and EMS ECU as per the circuit schematic. Any discontinuities found? Rectify the wiring harness as per the circuit schematic Go to next step 3 Check whether the O2 sensor is physically damaged. Call Hotline for assistance on whether O2 sensor need to be replaced or not. Go to next step 4 Check whether any leakages exist in exhaust gas flow path? Rectify / replace pipes to avoid leakages Go to next step 5 Check whether the Catalytic converter is defective Call Hotline for assistance on whether Catalytic Converter need to be replaced or not. Go to next step 3. Fault Persists. Call Hotline for assistance on whether O2 sensor need to be replaced or not. Go to next step 4 Fault Persists Call hotline Repeat above procedure for reconfirmation that fault is correctly rectified. DTC’s confirmation: After rectification, Test Drive the vehicle for 2 KM and ensure that no DTC’s are logged in ECM. In case of O2 sensor replacement, perform below routines activation: “Exchange of Lambda Sensor Unit $02 05 03”
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