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. P3050 – 86: - CP Signal Voltage - signal invalid Overview: ISO Code P3019 - 86 Customer Symptom Vehicle would not go into charging mode Fault Effects (On Vehicle) The vehicle is drivable but charging will not happen Lamp Status (If Any) Vehicle charging symbol is not seen when charging gun is plugged in vehicle charging inlet socket Fault Detection Condition Charging session stopped, since Gun Lock/Unlock Error detected and Gun locking can’t be ensured. Normal Operating Condition Charging will happen Probable Trouble Area CP line connection wiring Healing Condition If DTC trigger condition is healed, DTC is present only in memory Component Details: CP is most important communication cable between vehicle and station Preliminary Checks: NA Trouble Shooting: - 1. Remove the LV battery connections. Ste p No. Description Check point If Yes If No 1. Check for continuity between Vehicle Charging gun inlet and EVCU Check for continuity between Vehicle charging gun inlet CP pin C448A-6 and EVCU CP pin C776B-98 Problem is in EVCU. Action: Replace EVCU and try Fast Charging Problem is in wiring harness between Vehicle Charging gun inlet and EVCU Action: Repair harness DTC’s confirmation: - After rectification, read DTC using TML diagnostic tool and Clear the DTC Ensure no DTC is in defect/confirmed state before handing over to customer
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