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: 90 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. Trouble Shooting: Step Checks IF YES IF NO 1. Read IVN DTCs in ECM. Is MTO logged against RCM in ECM in current state? 1. Check continuity between ECM CAN_H to RCM CAN_H and ECM CAN_L to RCM CAN_L in vehicle wiring side connector. 2. Check if RCM ECU fuses are blown. 3. Also, check RCM ECU is powered up properly. RCM Battery, IGN and GND connected properly with RCM ECU. Go to step 2. Clear DTC. 2. Is continuity there? Check the resistance between ECM CANH and ECM CANL of ECM connector in vehicle wiring harness. (with IPC connected on the vehicle) Go to step 3. Repair the wiring harness if continuity is not there. Clear DTC. 3. Is Resistance R = 120 ohm. Clear DTC. Check the continuity between ECM CAN_L & IPC CAN_L And ECM CAN_H & IPC CAN_H In vehicle side connectors So Repair the wiring harness if continuity is not there. Clear DTC Go to step 4. 4. If fault still persists. then replace sensor and if fault still persists then call Hotline. Follow the above procedure again for Reconfirmation.
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