DTC Troubleshooting Master Document for BMS Version: 1.0 Date: 30th Nov 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. P3069 - 1C :- BMS voltage difference Static First level alarm Overview: cell ISO Code P3069 - 1C Customer Symptom NA Fault Effects (On Vehicle) NA Lamp Status (If Any) NA Fault occurrence scenario (In the order of probability) During all vehicle operations Normal Operating Condition No fault Probable Trouble Area Battery hardware Healing Condition Cell voltage difference eliminates System Details: Cell voltages are detected by the BMS internally and the value of the maximum and minimum cell voltages is populated in diagnostics through DID parameter 3415 and 3417. Preliminary Checks: 1) Ensure the vehicle is parked and not in charging 2) Ensure that the vehicle is in ignition ON condition Inspection Method: Connect the tool and communicate to the battery pack as instructed through APPENDIX-C Read DTC information of DTC ID – P3069 - 1C Rectification Action: 1) If DTC is appearing in real time, clear DTC information through service tool 2) If DTC is not appearing in real-time but has only occurred before, store the snapshot data. store the snapshot data. 3) Clear the DTC information on the respective DTC ID. DTC’s confirmation: After clearing, ensure the following points by referring to BMS DTC list. 1) Read DTC ID – P3069 - 1C for the existence of DTC information. 2) If DTC still exists, reflash the battery pack using the service tool with the latest release SW available in PLM database. 3) Read DTC ID – P3069- 1C or the existence of DTC information post flashing. 4) If DTC still exists, the HV battery pack component has to be replaced as instructed by the respective ECU replacement guide Component Location & Image; Connector Location; Connector View & Information: - APPENDIX-A
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