NEXON 2.0 EV DTC Troubleshooting Document for VCU Version: 1.0 draft Date: 31-Jan-2022 Copyright © TATA MOTORS Ltd. This document must not be used in anyway, such as copying and redistributing to third parties, without the consent of author. 2. Switch vehicle Ignition OFF. Remove the LV battery connector. Vehicle is in Ignition OFF mode? Go to step 3 Go to step 2 3. Check for the problem related to harness connecting brake pedal sensor and VCU Check if there is damage/short in harness/pin between VCU connector C776A- Pin 41, C776A- Pin 13 and brake pedal side LV connector C774 – Pin D and C774- Pin E (Refer schematic for details) Problem is in connector/ harness. Action: Repair harness Go to Step 4 4. Check for the problem related to harness connecting AC linear pressure sensor Check if there is damage/ short in harness/pin between VCU connector C776B- Pin 54, C776B- Pin 77 and AC linear pressure sensor LV connector C699A – Pin 1 and C699A – Pin 3 (Refer schematic for details) Problem is in connector/ harness. Action: Repair harness Problem in VCU DTC’s confirmation: - After rectification, send Clear DTC command by using TML diagnostic tool. Ensure no DTC is in defect/ confirmed state before handing over to the customer. Circuit Schematic Diagram: Brake Pedal sensor-2 AC linear pressure sensor
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