NEXON NEW MCE-2 DCT BS VI DTC Troubleshooting Guide Version: 1.0 Date: 16-06-2023 Author: Akash/Rahul Page:531 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. 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. ➢ Disconnect transmission side 28 pole connector (X-201) and check below resistance at (X-201) connector terminal Measure Resistance (Ω) Component check Pin 1 (T_VALVE_PWR_123) to Pin 28 (T_VALVE_5) 3 to 8 ok Internal, External wiring harness and Solenoid Pin 1 (T_VALVE_PWR_123) to transmission housing > 100k ok Internal, External wiring harness and Solenoid Pin 28 (T_VALVE_5) 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 Pin 1 (T_VALVE_PWR_123 (X-111,1)) to transmission housing > 100k ok TCU and External wiring harness Pin 2(T_VALVE_5) to transmission housing > 100k ok TCU and External wiring harness • Continuity Check Check continuity between pins/terminals of External and Internal wiring harness connector for specific solenoid and pressure sensor for which the DTC is triggered. DTC’s confirmation:-
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