NEXON NEW MCE-2 DCT BS VI DTC Troubleshooting Guide Version: 1.0 Date: 16-06-2023 Author: Akash/Rahul Page:161 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. 46. P0795-12 Pressure control solenoid 3 (EDS 3): short-circuit to battery Overview: ISO Code P0795-12 Customer Symptom • Transmission fault lamp ON • Clutch 1 Deactivated, only limited gears available Fault Effects (On Vehicle) • Transmission fault lamp ON • Clutch 1 Deactivated, only limited gears available Lamp Status (If Any) Transmission fault lamp ON Service indication 0x2 Fault Detection Condition Internal TCU error (FFT = 100ms) Normal Operating Condition TCU does not detect short to supply fault Probable Trouble Area 1. Transmission wiring loom for any damage. 2. Hydraulic unit (Clutch 1 actuator) & transmission oil. 3. TCU damaged. Healing Condition The reaction is cleared at SW restart if the detection is FALSE for more than 0 ms Component Details: Clutch actuator 1 & 2 mounted in hydraulic control unit and makes internal electrical contact with the TCU. EDS 3 = Clutch 1 (“Brake”) actuation pressure solenoid. Preliminary Checks: 1) Loose/ Damaged Connections between Electro valve and TCU. 2) Loose/ Damaged mechanical fitments of TCU (TCU to valve body mounting). 3) Check correct fitment of ground cable connections on vehicle chassis. Trouble Shooting:- Step Checks IF YES IF NO 1. Check the transmission-wiring loom for any damage. Is there any rust/oxidation/pin back out observed on TCU PIN 15 & 26 in Transmission side 28 pole connector and on pin 16 & 6 in Transmission circular connector? If damaged, replace the wiring loom. Go to step 2 2. If problem persists, replace the hydraulic unit & transmission oil. Perform all necessary transmission adaptions. Go to step 3 3. Replace the TCU if the problem persists & flash the adaption data from the previous TCU. Clear the DTC • Resistance Check Solenoids , Pressure sensors mounted on HCU should be checked for resistance if there is DTC triggered.
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