NEXON NEW MCE-2 DCT BS VI DTC Troubleshooting Guide Version: 1.0 Date: 16-06-2023 Author: Akash/Rahul Page:581 of 645 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. Engine lead torque signal is transmitted via CAN bus to the TCU. In case of this particular DTC being set, it is expected that an EMS component is at fault. Preliminary Checks:- 1) Loose/ Damaged EMS sensor/actuator Connections. 2) Check for damage or back out of pins at EMS connector and TCU connector. 3) Check correct fitment of ground cable connections on vehicle chassis. Trouble Shooting:- Step Checks IF YES IF NO 1. Check the engine controller, if the fault for any component affecting torque signal on CAN is reported. Check with the EMS diagnostic tool, are there EMS related DTC’s present? Fix the problem on engine controller or engine components. Go to step 2 2 If this issue is only reported in TCU, disconnect the vehicle side connector on TCU & connect it back again. Clear the DTC and check if the DTC does not come back. Go to step 3 3 If issue persists, check wiring harness towards TCU. If damaged, replace the vehicle side transmission wiring harness. Clear the DTC and check if the DTC does not come back. DTC’s confirmation:- After rectification, clear all DTC’s and ensure the following points by referring TCU parameters using TML diagnostic tool before handing over to customer. • Drive the vehicle through all gears in both Automatic and Manual modes. • Ensure no DTC is active and Transmission Fault Lamp is OFF. Circuit Schematic Diagram:-
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