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: 941 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 Are there any pins damaged at EMS ECU Connector Replace the connector or wiring harness Go to Next Step 4 Are there any pins backed out from the EMS ECU Connector Rectify/Replace Connectors Go to Next Step 5 Measure the AC Relay Coil Inductance value and check whether it is above than 30 mH. Replace AC Relay Go to Next Step 6 Measure the flyback voltage appearing at ECM pin K090 when AC relay is turned Off. Is the voltage > 20 V? Replace AC Relay Go to Next Step 6 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. Perform the IO / Actuator Test for AC Relay. Test shall be successful. Circuit Schematic: Component Location & Image:- NA Connector View & Information: - NA
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