NEXON NEW MCE-2 DCT BS VI DTC Troubleshooting Guide Version: 1.0 Date: 16-06-2023 Author: Akash/Rahul Page:179 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. 4 If oil is contaminated, replace transmission with new oil and filter, and let the transmission run for some time (stationary, manual mode go through gears) + repeat check of contamination Clear the DTC and check if the DTC does not come back. Go to step 5 5 Repeat flushing max 2 times, if contamination remains, a component is generating pollution; replace transmission Clear the DTC and check if the DTC does not come back. Go to step 6 6 If oil is not contaminated, but DTC persists, check gasket between HCU and clutch housing, If broken/defect; replace gasket, clear the DTC and check if the DTC does not come back. Go to step 7 7 If DTC persists, replace the HCU, flash new HCU cooling adaption on tcu and perform CPC adaption. Clear the DTC and check if the DTC does not come back. Go to step 8 8 If DTC persists, Check with different TCU if the problem persists (flash the adaption data from the original TCU). If NOK, replace TCU, Clear the DTC and check if the DTC does not come back. • Resistance Check Solenoids , Pressure sensors mounted on HCU should be checked for resistance if there is DTC triggered. Below table reflects the signals for each solenoid and pressure sensor and range of acceptable resistance. ➢ Disconnect Transmission side 28 pole connector and check below resistance at connector terminal Measure Resistance (Ω) Component check Pin 15 (T_VALVE_3_HS) to Pin 26(T_VALVE_3_LS) 3 to 8 ok Internal, External wiring harness and Solenoid Pin 15 (T_VALVE_3_HS) to transmission housing > 100k ok To check external and internal wiring harness Pin 26 (T_VALVE_3_LS ) to transmission housing > 100k ok Internal, External wiring harness and Solenoid ➢ Remove vehicle connector from TCU, Disconnect transmission circular connector and check below resistance at transmission circular connector Measure Resistance (Ω) Component check
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