SERVICE MANUAL SUPPLEMENT BOOK - 1 NEW NEXON EV
Developed by: Technical Literature Cell. Release Date : Oct. 2024 / First Edition. The information provided in this manual is based on the latest product information available at the time of publication. . C Copyright 2024 TATA MOTORS All rights reserved. The information in this manual shall not be reproduced or copied, in whole or in part, in any form without written permission from TATA MOTORS ELECTRIC VEHICLES LTD. Vehicles are subject to modification in design, specification and equipment. Also refer the Service Circulars released by Customer Support about product & procedures.
INTRODUCTION This Supplement Service manual provides information pertaining to technical Specifications, repair, maintenance and overhaul of different exclusive Changes for TATA NEXON EV 2024. All the data contained in this manual is based on the latest product information available at the time of publication and with the assumption that the person is well aware of general Automobile practices. This manual emphasizes the special features of the vehicle and thus benefits our workman, who is conversant with general Automobile practices. For ease of use, this workshop manual is divided into 5 volumes, comprising several sections. Each aggregate has a separate section. The contents which are not covered in this supplement service manual have to be read in conjunctions with “TATA NEW NEXON EV” Service manual. THE BOOK – 1 CONTAINS REMOVAL, REFITMENT AND REPLACEMENT PROCEDURE OF EXCLUSIVE CHANGE AGGREGATES FOR CNG HIGH VOLTAGE (HV) ELECTRICAL SYSTEM BRAKES (with Integrated IVBAC) WHEELS & TYRES TPMS BODY (PANORAMIC SUNROOF only) THE BOOK – 2 CONTAINS DIAGNOSTIC TROUBLE SHOOTING CODES (DTC) LIST OF EXCLUSIVE CHANGE ECU’S THE BOOK – 3 CONTAINS SERVICE SCHEMATICS
TABLE OF CONTENT SR. NO AGGREGATE 1 HV ELECTRICAL SYSTEM 2 BRAKES (With Inegrated IVBAC) 3 WHEELS & TYRES 4 TPMS 5 BODY (PANAROMIC SUNROOF Only)
HV ELECTRICAL SYSTEM_ELR HV ELECTRICAL SYSTEM
HV ELECTRICAL SYSTEM_ELR CONTENTS 1. GENERAL INFORMATION..................................................................................................... 1 A. GENERAL TOOLS FOR ELECTRIC VEHICLE ................................................................... 1 B. HAND GLOVES .................................................................................................................. 1 C. PPES FOR HV.................................................................................................................... 2 D. MEASURING TOOLS ......................................................................................................... 5 E. SAFETY INSTRUCTIONS .................................................................................................. 6 F. DO’S AND DON’TS ............................................................................................................. 7 G. SAFETY WHILE SERVICING ........................................................................................... 10 H. WASHING INSTRUCTIONS ............................................................................................. 14 I. ELECTRICAL COMPONENT INFORMATION.................................................................... 15 J. MOTOR COMPARTMENT................................................................................................. 17 2. TYPES OF CHARGING ........................................................................................................ 18 A. AC CHARGING (WALL MOUNT UNIT) ............................................................................. 19 B. NORMAL CHARGING ....................................................................................................... 21 C. FAST CHARGING............................................................................................................. 26 3. TIGHTENING TORQUES...................................................................................................... 28 4. SPECIAL TOOLS ................................................................................................................. 35 5. HV COMPONENTS DETAILS............................................................................................... 37 A. E-DRIVE EXPLODED VIEW ............................................................................................. 37 B. 3IN1 UNIT ASSY ............................................................................................................... 38 C. HV BATTRERY ASSY....................................................................................................... 39 D. HV SCHEMATICS (KANGER 3.0 ELR)............................................................................. 40 6. INSTRUCTION FOR WORKING ON HV COMPONENTS ON VEHICLE .............................. 41
HV ELECTRICAL SYSTEM_ELR 7. HV CONNECTOR CONNECTION & LOCKING PROCESS.................................................. 42 A. 3IN1 COMBO BOX TO MCU ............................................................................................. 42 B. 3IN1 COMBO BOX TO BATTERY..................................................................................... 42 C. 3IN1 COMBO BOX TO CCS PORT................................................................................... 43 D. 3IN1 COMBO BOX TO E COMPRESSOR ........................................................................ 44 E. COMPRESSOR SIDE CONNECTOR................................................................................ 44 F. 3IN1 COMBO BOX TO AC INPUT..................................................................................... 45 G. 3IN1 COMBO BOX TO PTC.............................................................................................. 45 H. 3IN1 COMBO BOX TO SIGNAL........................................................................................ 46 8. ISOLATION MEASUREMENT .............................................................................................. 47 9. HV COMPONENTS UNDER BONNET COMPARTMENT..................................................... 50 A. 3IN1 UNIT ASSY REMOVAL ............................................................................................ 50 B. SERVICIABLE ITEM 3IN1 UNIT ....................................................................................... 52 C. TOOLS FOR 3IN1 UNIT SERVICIABILTY ........................................................................ 54 D. 3IN1 UNIT SERVICIABILTY .............................................................................................. 55 E. VEHICLE CONTROL UNIT REMOVAL ............................................................................. 59 F. E - DRIVE REMOVAL ....................................................................................................... 60 E. REDUCER OIL LEVEL CHECKING / DRAIN / FILLING DO & DONTS............................. 63 10. TRACTION COOLING SYSTEM (TCS) ................................................................................ 65 A. SYSTEM LAYOUT ............................................................................................................ 65 B. CIRCUIT SCHEMATICS ................................................................................................... 65 C. TCS COOLANT DRAINING PROCEDURE....................................................................... 66 D. TCS COOLANT FILLING PROCEDURE........................................................................... 66 E. RADIATOR / RADIATOR FAN REMOVAL ........................................................................ 67 F. CONDENSOR REMOVAL................................................................................................. 68
HV ELECTRICAL SYSTEM_ELR G. TCS AUX TANK RESERVIOR REMOVAL........................................................................ 70 11. HV BATTERY ....................................................................................................................... 71 A. SYSTEM LAYOUT ............................................................................................................ 71 B. HV BATTERY REMOVAL ................................................................................................. 71 12. BATTERY COOLING SYSTEM (BCS).................................................................................. 72 A. SYSTEM LAYOUT ............................................................................................................ 72 B. CIRCUIT SCHEMATICS ................................................................................................... 72 C. BCS COOLANT DRAINING PROCEDURE ...................................................................... 75 D. BCS COOLANT FILLING PROCEDURE .......................................................................... 75 E. BCS AUX TANK RESERVIOR REMOVAL........................................................................ 76 F. COMPRESSOR ................................................................................................................ 76 G. BATTERY COOLING PUMP REMOVAL .......................................................................... 78 H. CHILLER UNIT (HEAT EXCHANGER) REMOVAL ........................................................... 78 13. HV / LV CHARGER CABLE.................................................................................................. 79 A. HV / LV CHARGER PORT & CABLE REMOVAL .............................................................. 79 B. CCS2 INLET ACTUATOR REPLACEMENT PROCEDURE .............................................. 81 14. CRADLE ............................................................................................................................... 84 A. CRADLE EXPLODED VIEW ............................................................................................. 84 B. CRADLE REMOVAL ......................................................................................................... 84 C. CRADLE FITMENT ........................................................................................................... 86 15. CRADLE MOUNTS ............................................................................................................... 88 16. FRONT FRUNK ASSEMBLY WITH BRACKET REMOVAL & ASSEMBLY REMOVAL ...... 89
HV ELECTRICAL SYSTEM_ELR 1 1. GENERAL INFORMATION A. GENERAL TOOLS FOR ELECTRIC VEHICLE These tools are to be use while working on High voltage system and components: (3in1 unit Assy, E Drive, Battery Pack, PTC Heater, Compressor and HV Harnesses.) a) General Tools - Can be used on mechanical components and maintain specified torque. b) Insulated tools - Must & should use insulated tools while working on High voltage system components and maintain recommended torques, and Proper range of measuring tools should be used. B. HAND GLOVES: Nitrile - Must and should use nitrile gloves while working on High voltage system components. ESD - must and should use while removing and assembling of any component of LV System. Cotton - must use while working on mechanical components (brakes, suspension etc.).
HV ELECTRICAL SYSTEM_ELR 2 C. PPEs FOR HV Electrical safety shoes: Electric safety shoes are nonconductive shoes, which does not complete electrical circuit through your body to ground. These are lightweight as compared to mechanical safety shoes. While working on High voltage system one should use electrical safety shoes. Safety goggles and Helmet: To be use as indicated in the designated area. Insulating gloves with leather protectors: While working on High voltage system one should use insulating gloves in accordance with EN 60903:2003 (AC 1000V) Before using insulating gloves, check them for any cuts or holes by visual inspection. Also perform inflation test Each operator should have their own insulation gloves to avoid misuse and proper handling Over insulation gloves, operators should use leather protectors, to avoid holes in insulating gloves by sharp objects. Insulating tools: While working on high voltage system use insulating VDE tools in accordance with IEC 60900:2004(AC 1000V). This is to avoid persons contact with metal part of tool. Handle these tools carefully.
HV ELECTRICAL SYSTEM_ELR 3 Insulating mats: Insulating mats are used to isolate person working on vehicle from ground. Image for Illustration only Insulated rescue hook: Insulated rescue hook should be placed near working area and should easily accessible. In case of any person gets shock, other person should not touch with hands and pull the person who got shock. Instated other person should pull the person who got shock with insulated rescue hook shown below. Image for Illustration only Lock out and tag out: In the workplace always have lock-outs on items with a potential safety concern. Lock-out/de-energize high voltage equipment before debugging, working, or installing new equipment. Ensure that only qualified people are working on the vehicle. Minimizes the chance of injury for curious “passers-by” when nobody is around. LOTO (Lockout, Tag-out) examples: Power source for equipment (line power, power supply, etc.).
HV ELECTRICAL SYSTEM_ELR 4 Authorized personnel: Only authorized personnel who are aware of the high voltage dangers should work on HV equipment. Image for Illustration only Buddy system: Do not work alone on high voltage system. Make sure somebody is there to monitor and help you. Image for Illustration only
HV ELECTRICAL SYSTEM_ELR 5 D. MEASURING TOOLS: While working on high voltage system we use many tools to identify presence of high voltage system, monitor different parameters and check health of system Below are the components which we generally use: MULTIMETER Multimeter can be used to measure current, voltage, continuity of circuit. For measurement using multimeter we need terminals to be accessible Cat III type Multimeters should be used. ISOLATION MEASUREMENT TOOL (MEGGER) Isolation measurement tool is used to measure resistance connected between its terminals. It can be done at different voltages. Based on the resistance value we can predict if high voltage is in contact with low voltage or not.
HV ELECTRICAL SYSTEM_ELR 6 E. SAFETY INSTRUCTIONS: COLOURED CONE SYSTEM
HV ELECTRICAL SYSTEM_ELR 7 F. DO’S AND DON’TS (Images for Illustration only) DO’S DON’TS Always wear appropriate PPEs before working on high voltage system. For working on HV system, undergo training. Before start working on HV, system contact vehicle owner and confirm it is safe to work. Do not have fear that it is not safe to work on High voltage system. Do not work on HV system if you have not undergone training. Do not touch any HV component (marked as danger and orange color) inside vehicle if you do not knowledge about system. Do not assume anything and start working. Follow one hand principle: Use only one hand while working on HV components. Do not use both hands together while working on electrical vehicle components. During vehicle build, keep the 12V LV battery negative disconnected. Do not connect the 12V LV battery negative during vehicle build.
HV ELECTRICAL SYSTEM_ELR 8 DO’S DON’TS Each EV components enclosures shall be connected to chassis with cable. Do not keep the earthing point in loose condition; apply the torque as per the drawing. HV battery pack power connector and service disconnect shall be connected at the last, when all safety checks are done. Never work on high voltage system when it is in active state Use the insulated tools for the assembly. Do not use the non-insulated tools for the assembly.
HV ELECTRICAL SYSTEM_ELR 9 DO’S DON’TS Use the insulated gloves & shoes for HV System. Do not touch the HV components having the symbol (shown in the image) without insulated gloves. Remove watches, rings or any metal ornaments while working on high voltage system. Do not wear watches, rings or any metal ornaments while working on high voltage system. Only trained person aware of HV safety shall be allowed to work on vehicle. Do not start working on High voltage system immediately after disconnecting high voltage battery, wait for 5minutes (Ask supervisor for exact timing, as it may vary from system to system. Earthing points where enclosures are connected to chassis shall be free from the point. Do not carry out any welding work when high voltage battery is active. After removing service, disconnect LOTO practice to be followed.
HV ELECTRICAL SYSTEM_ELR 10 G. SAFETY WHILE SERVICING (Images for Illustration only) Example: Changing HV fuse inside 3 IN 1 Unit (Images for Illustration only)
HV ELECTRICAL SYSTEM_ELR 11 Remove 3 IN 1 Cover: Follow one hand rule
HV ELECTRICAL SYSTEM_ELR 12 (Images for Illustration only)
HV ELECTRICAL SYSTEM_ELR 13 (Images for Illustration only)
HV ELECTRICAL SYSTEM_ELR 14 H. WASHING INSTRUCTIONS HIGH-PRESSURE WASHING INSRTUCTION WARNING Do not direct high-pressure washer fluid/ water jets (Pressure above 0.5 bar) at electrical devices and connecter during washing. This is to prevent malfunction / failure of electrical system due to water ingress. High-pressure washing is not allowed in the motor bay and on the battery connectors. When using high-pressure washers, make sure to maintain sufficient distance from the vehicle. Insufficient clearance or excessive pressure can lead to component damage or water penetration. Do not spray the camera, sensors or its surrounding area directly with a high-pressure washer. Shock from high-pressure water may cause the device to not operate normally. Do not bring the nozzle tip close to boots (rubber or plastic covers) or connectors, as they may be damage if they are exposed to high-pressure water. Pressure washing is not recommended at under hood area (Bonnet), under body & near rear LH.wheel arch. (Images for Illustration only) WASHING PROCEDURE Following these tips while washing your vehicle. 1. Always wash your vehicle in shade and the surface is at room temperature. 2. Wash with mild vehicle wash soap like ‘Car Shampoo’ and use a soft bristle brush, sponge or soft cloth and rinse it frequently while washing to avoid scratches. 3. To avoid scratches, please wear soft gloves. Remove finger rings, nails, wristwatch while washing. 4. To remove stubborn stains and contaminant like tar, use turpentine or cleaners like ‘Stain remover’, which are safe for, paint surfaces. 5. Avoid substances like petrol, diesel, kerosene, benzene, thinner, acids or other solvents that cause damage to paint. 6. Dry your vehicle thoroughly to prevent any damp spots. 7. Rinse all surfaces thoroughly to prevent any traces of soap and other cleaners as this may lead to the formation of stains on the painted surface later.
HV ELECTRICAL SYSTEM_ELR 15 I. ELECTRICAL COMPONENT INFORMATION SR. NO. DESCRIPTION 1 TRACTION MOTOR 2 MCU 3 3 IN 1 UNIT ASSY 4 HIGH VOLTAGE BATTERY 5 CHARGING PORTS 6 CABLE HV AC CHARGING GUN 7 LOW VOLTAGE BATTERY 8 HIGH VOLTAGE CABLES
HV ELECTRICAL SYSTEM_ELR 16 COMPONENT DETAILS A. High Voltage Battery (lithium - ion) - FOR NEXON 3.MY24 EV ELR: 45 kWh Lithium Ion Battery Pack An on board high voltage electrical energy storage device. B. 3in1 Unit Assy i. DC – DC Converter A device that converts HV DC power from the HV battery to LV DC power which is required to maintain LV battery charge, which in turn powers the LV systems like lights, wipers, infotainment, etc. in the vehicle. ii. Power Distribution Unit Distributes power from the high voltage battery to the HV components like inverter, DC-DC converter, Ecompressor etc. iii. On-Board Charger (OBC) - 6.6 kW A device that charges the high voltage battery by converting AC power from a domestic supply into DC power and supplying it to the battery. C. Motor Control Unit A device to control traction motor. D. High Voltage Cable Use for high voltage electrical energy. E. Charging Port Provided for charging purpose. F. Cable HV AC Charging Gun Provided for charging purpose. G. Traction Motor - 120 kW (163.15PS) A device that converts electrical energy into rotational mechanical energy, which is then transfer as rotational torque to the wheels through the gearbox. NOTE: 3in1 Unit Assy includes OBC, DCDC converter and PDU in a single unit and the functionality of each unit is same as mentioned above.
HV ELECTRICAL SYSTEM_ELR 17 J. MOTOR COMPARTMENT SR. NO. DESCRIPTION 1 BRAKE FLUID CONTAINER 2 COOLANT TANK (TCS) 3 FRONT FRUNK ASSEMBLY 4 COOLANT TANK (BCS) 5 12-V BATTERY 6 MOTOR COMPARTMENT FUSE BOX 7 WINDSHIELD WASHER CONTAINER
HV ELECTRICAL SYSTEM_ELR 18 2. TYPES OF CHARGING Normal charging / AC charging Approximately 15 hours (time for a 0-100% charge, may increase basis factors such as ambient temperature, electrical load on meter, vehicle usage during and before charging, air conditioning usage during charging, aux loads etc.). AC Charging (WMU) Approximately 7 hours (time for a 0-100% charge, may increase basis factors such as ambient temperature, electrical load on meter, vehicle usage during and before charging, air conditioning usage during charging, aux loads etc.). Fast charging (DC charging) Approximately 1 hour (time for a 0-80% charge, may increase basis factors such as charger rating, ambient temperature, vehicle usage during and before charging, air conditioning usage during charging, aux loads etc.) NOTE: Battery performance and durability can deteriorate if the fast charger is used constantly. Use of Fast Charging should be minimized in order to help prolong high voltage battery life. After a maximum of four fast charging cycles of battery pack, it is recommended to use Normal Charging to achieve 100% State of Charge for optimum performance of high voltage battery pack. TYPRS OF CHARGING CHARGING COMPONENT SPECIFICATIONS CHARGE PORT CHARGE GUN POWER SOURCE AC Charging (WMU) Nominal Voltage :230V AC RMS single 50Hz (L1,N ,PE,3 - Phase) Power Rating:7.5Kw AC RMS Rated Current 32A AC RMS Normal / AC Charging Nominal voltage: 230 V AC RMS Single phase, 50Hz supply. Power rating: 3.3 kW AC RMS Rated current 16A AC RMS. Fast / DC Charging Charging station voltage capability should be greater than or equal high voltage battery pack nominal voltage.
HV ELECTRICAL SYSTEM_ELR 19 A. AC CHARGING (WALL MOUNT UNIT) 1. EPB should be in engaged condition (Charging will not start without engaging EPB). 2. Pull the ‘Charging-inlet Flap Open Lever’ to open the charging inlet flap. 3. Open the protective cap on Charging Inlet (AC side). 4. Remove the charging gun from the WMU. (WMU will be separately installed at customer end). 5. Open the protective cap on WMU Charging Gun. 6. Before connecting the WMU charging gun to vehicle charging socket, make sure the gunlock is released. 7. If the actuator is engaged and the gun is not getting inserted properly, contact TATA Motors EV service center. 8. Remove any dust on the Charging Gun and Charging Inlet. Connect the WMU charging gun to vehicle AC Charging Inlet. 9. Scan the RFID provided, on the WMU to start charging. 10.Charging gun will be locked automatically. You will hear a “click” sound, when the gun is connected correctly. 11.Normally the car starts automatically charging. If not, please refer ‘Troubleshooting Guide in WMU’s owners' manual. 12.Open the door and see instrument cluster for State of Charge, Time to Charge and Gun connection status. 13.To stop the charging, scan the RFID on WMU. 14.The charging gun will be unlocked after pressing the fascia switch on the dashboard panel. Pull out the gun. 15.Put on the protective caps on both Charging Gun and Vehicle Inlet. Place the Charging gun back and close the charging inlet flap. NOTE: Separate manual for WMU will be provided along with the product. For more details on WMU, LED indications, troubleshooting guide etc. refer the same. WMU (WALL MOUNT UNIT) INPUT POWER REQUIREMENT AC Supply System 1-Phase, 3 Wire AC system (Ph + N + E) Nominal Input voltage 3Ø, 230VAC (Range: 90VAC to 265VAC) Input Frequency 50/60Hz Input Power 7.5kW (As per the System Capacity) SAFETY PRECAUTIONS i. Make sure that the equipment is well-grounded to avoid electric shock before opening the equipment ii. Do not modify, add, or alter any part of this product under any circumstances iii. Please make sure the input voltage, frequency, and other conditions have conformed to equipment requirements before power on iv. To ensure the service life of the equipment and stable operation, the equipment shall not be used in volatile gas or flammable environment DO’S AND DON’TS Do not touch any live part in the system while the system is ON. Do not modify, add, or alter any part of this product under any circumstances. Do not try to open the system by self in case of any issue as it may lead to warranty termination of the product. Do not install the equipment in a flammable environment. Do read the complete manual before starting operating the system.
HV ELECTRICAL SYSTEM_ELR 20 ALARM LIST FOR WMU Alarms Reason LED Indication EPO Pressed Emergency button pressed by someone. Solid Red + Alarm NE Voltage High Neutral Earth voltage comes more than 10V or False read by charger or Phase-neutral terminal interchange. Blinking – Type 2 Red for 500 msec Earth Fault Earth Wire not connected/Phase- neutral terminal interchange Solid Red + Alarm RFID Comm Fail RFID Card stops communicating with the main Board or Energy meter not connected or energy meter addressing not done. Blinking – Type 1 Red for 1 Sec Earth Leakage Internally current leakage to earth or false reading CT damage or circuitry issue. Solid Red + Alarm O/P Current High When the load current increases from 32-35 A Blinking – Type 1 Red For 1 Sec Mains Fail When the input voltage is not in its limit. Blinking – Type 1 Red For 1 Sec Mains Low When the input voltage is less than 150V Blinking – Type 1 Red For 1 Sec Mains high When the input voltage is greater than 270V. Blinking – Type 1 Red For 1 Sec
HV ELECTRICAL SYSTEM_ELR 21 B. NORMAL/AC CHARGING Precautions for Normal Charging 1. Proper maintenance of earthling pit is must. Add water & add salts at regular intervals into the earth pits in order to maintain the value of earth resistance. Check annually the condition of the electrodes so as to add or replace electrodes. 2. The electrical socket used for EV charging and its associated wiring should be able to supply 15A dedicated load continuously. 3. Check the charging inlet for accumulation of dust or any foreign objects. 4. Don’t try to pull off the charging gun during charging. 5. Don’t pull out the charging gun if it is in locked condition as excess force can break or damage the locking mechanism. Charging instructions 1. Vehicle should be in a “P” mode (Park Mode) before connecting the charging gun. 2. Vehicle charging port must be free of dust, water or snow while connecting the charging gun; if not proper cleaning method must be used to remove dust, water and ice. Refer ‘Section 6. Cleaning of Vehicle Inlet’. 3. If the charging gun is removed, reinsertion should be done after at least 10 seconds of removal of the charging gun. Gun unlocking feature on EV After AC normal/slow charging, once AC power supply is switched off, Fascia switch( on dashboard panel) need to be pressed to unlock the charging gun. In case of fast charging it will take around 15 seconds for the charging gun to unlock automatically after completion of charging or after switching off charging. Charging gun unlock through fascia switch. (For slow charging only). Normal Charging procedure: 1. Engage “P” mode if it is not engaged. 2. Connect the plug to the AC power socket. 3. DO NOT plug into a power strip. 4. Open the protective cap on Charging Gun. 5. Press the Charging-inlet flap touch button in fascia Switch to Open the Charging inlet flap. NOTE: It is electrically operated flap. It will also auto close within 3minutes when not in use. 6. Open the protective cap on Charging Inlet. 7. Before connecting the charging gun to vehicle charging socket, make sure the gun lock is released. CAUTION: If the Gun Lock is not released please don’t insert the Charging Gun forcefully into the socket. It may damage the Charging Socket.
HV ELECTRICAL SYSTEM_ELR 22 8. If the actuator is engaged and the gun is not getting inserted properly, contact TML service center. 9. Remove any dust on the Charging Gun and Charging Inlet. Connect the charging gun to vehicle AC Charging Inlet. 10. Switch on the AC supply. 11. Charging Gun will be locked after switching on the AC supply. You will hear a “click” sound, when the gun is connected correctly. NOTE When vehicle is in Charging Mode, it will not go in Drive (D), Sport (S) or Reverse(R). 12. Normally the car starts automatically charging. If not, please refer ‘Troubleshooting Guide for Normal Charging’ table. 13. Open the driver door and see instrument cluster to know SoC, time to charge and gun connection status. 14. In case the “p” mode is not engaged or partially engaged the charging won’t start and ‘Engage Park Brake to start charging’ message will be displayed on instrument cluster. NOTE Infotainment and cabin cooling can be used during charging of the vehicle by putting the vehicle in Ignition. 15. To stop the charging, switch off the AC power supply. 16. The charging gun will be unlocked after switching off the AC supply. 17. Pull out the plug. 18. Put on the protective caps on both Charging Gun and Vehicle Inlet. NOTE Once Normal/Fast charging is completed, 90 seconds of time gap is required before the vehicle can be started. After turning off the vehicle, wait for four seconds if you want to start the vehicle again. In emergency charging shutdown conditions, Gun won’t be unlocked. Contact authorised TATA Service Centre. In unforeseeable circumstances if the charging gun is stuck to the socket after charging is done, user has to contact the service personnel. No mechanical override to remove the charging gun is available for user.
HV ELECTRICAL SYSTEM_ELR 23 MAINTENANCE OF NORMAL CHARGING GUN The Portable Charger for Normal charging requires no maintenance other than occasional cleaning. WARNING: To reduce the risk of electrical shock or equipment damage, be cautious while cleaning the connectors and case. Clean the charging gun using a soft cloth lightly moistened with mild detergent solution. Never use any type of abrasive pad, scouring powder, or flammable solvents such as alcohol or benzene. 1. The electrical socket used for EV charging and its associated wiring should be able to supply 15A dedicated load continuously. 2. Do not use charging gun if it is wet in interface area. Allow it to dry before use. CAUTION: Changes or modifications to this product by other than an authorized service facility may void SAEJ1772 compliance. State of charge (SoC) gauge for high voltage battery Provided in the instrument cluster as a tell-tale. It shows the charging status of the high voltage battery. Low charge or minimum position on the indicator indicates that there is not enough energy in the high voltage battery. Full charge or max position indicates that the HV battery is fully charged. When driving on highways, make sure to check in advance if the HV battery is charged enough. When the bar turns red on the high voltage charge indicator, the low charge warning lamp turns ON to alert you of the battery level. When Charge percentage is less than 25%, sport mode will be deactivated and cannot be further activated. When charge percentage goes below 10%, vehicle speed will get limited (limp home mode will get activated).
HV ELECTRICAL SYSTEM_ELR 24 NORMAL CHARGING CONTROL BOX INDICATIONS: 1. Home 2. Control Box 3. Vehicle 4. Fault Normal Charging Control Box Normal Charging control box indications Working state Home Control box Vehicle Fault Example Description Selfinspection state Blink Blink Blink Blink Self-inspection for system Standby state On Off Off Off No fault Blink Plug temperature is high Charging state On On Blink Off No fault Blink Plug temperature is high Charging stopped On On On Off No fault Blink Plug temperature is high
HV ELECTRICAL SYSTEM_ELR 25 TROUBLESHOOTING GUIDE FOR NORMAL CHARGING Refer the below table if charging is not starting or if it stops abruptly. The below symbols of ‘House’, ‘Control Box’, ‘Vehicle’ and ‘Fault’ can be seen on the control box beside the respective LEDs. Fault category Indication Home Control box Vehicle Fault Recommended action Interface fault in home Blink Off Off On Improper earth connection. Check the earth pit. Short circuit between PE and phase. Error in domestic supply side. Stop charging. AC voltage is either less than 190V or more than 250V. Error in domestic supply side. Stop charging. Blink Off Off Blink Proper connection of plug and socket should be ensured. Also, check socket rating and use 20 A socket. Control box fault Off Blink Off On Contact TATA Motors service engineer. Off Blink Off Blink Vehicle fault Off Off Blink On Go to nearest TATA Motors Service Centre. Off Off Blink Blink Legend
HV ELECTRICAL SYSTEM_ELR 26 C. FAST CHARGING 1. Engage parking Brake. (Charging won’t start without engaging the parking Brake). 2. Pull out the Charging Gun from DC/Fast Charging Station. 3. Open the protective cap on Charging Gun. 4. Pull the ‘Charging-inlet Flap Open Lever’ to open the charging door. 5. Open the charger-inlet flap. 6. If the actuator is engaged and the gun is not getting inserted properly, contact TML service center. CAUTION: If the Gun Lock is not released please don’t insert the Charging Gun forcefully into the socket. It may damage the Charging Socket. 7. Remove any dust on the Charging Gun and Charging Inlet. 8. Connect the charging gun to vehicle AC and DC Charging Inlet. 9. Switch on the DC charging station supply. 10. Charging Gun will be locked after switching on the DC charging station. Click sound is heard when gun is locked. 11. Normally the car starts automatically charging. If not, please refer Charging Gun’s Fault Indication & Indication Priority. NOTE: When vehicle is in Charging Mode, it will not go in Drive(D), Sport (S) or Reverse(R). 12. Open the driver door and see instrument cluster to know SoC, time to charge and gun connection status. 13. In case the park brake is not engaged or partially engaged the charging won’t start and ‘Engage Park Brake to start charging’ message will be displayed on instrument cluster.
HV ELECTRICAL SYSTEM_ELR 27 NOTE: Infotainment and cabin cooling can be used during charging of the vehicle by putting the vehicle in Ignition. 14. To stop the charging, switch off DC charging station. 15. The charging gun will be unlocked 15seconds after switching off the supply from DC charging station. 16. Put on the protective caps on both Charging Gun and Vehicle Inlet. NOTE: If you remove the charging gun from the vehicle and if you wish to reinsert the gun to recharge the vehicle, please wait for at least 10 seconds before charging gun is plugged again. In emergency charging shutdown conditions, Gun won’t be unlocked. Contact authorised TATA Service Centre. Action to be taken when charging stops abruptly Check the reason for interruption of charging. (Refer ‘Troubleshooting guide for Normal Charging’ table). Switch off the AC supply. Wait for 5 minutes. Restart the charging. (Refer charging procedure). Cleaning of Charging Inlet: Covering the charging gun and charging inlet by dust cap will ensure protection from water and dust. Precautions to be taken while cleaning the charging inlet: Keep the vehicle lid always closed. When the lid is open ensure that dust caps are in closed position. During normal charging, make sure that DC charging cap is closed. For any particle accumulation, blowing air should be done to clean the CCS2. No water or any liquids to be used. NOTE: Water entering into the charging port will always be drained through the drain system. If water is stagnant in charging port area call Tata Motors Authorised service centre to rectify the issue. FAST CHARGING ARCHITECTURE
HV ELECTRICAL SYSTEM_ELR 28 3. TIGHTENING TORQUES: SR. NO. DESCRIPTION FASTENER TIGHTENING TORQUE (Kg-m) LOCATION 1 BRACKET LH (MOTOR MOUNTING SUPPORT) M10x1.25x55 SPRING WASHER B10 WASHER A10.5 4.9 2 TCS PUMP BRACKET ON EDRIVE FL SCR M10X1.25X25 4.9 3 TCS PUMP WITH C CLAMP HEX FL SCR M6X18 TS171308.8-SS8451S2-Y 1 4 BRACKET ASSY RH SIDE MOTOR MOUNT M10x1.25x55 SPRING WASHER B10 WASHER A10.5 4.9
HV ELECTRICAL SYSTEM_ELR 29 SR. NO. DESCRIPTION FASTENER TIGHTENING TORQUE (Kg-m) LOCATION 5 3IN1 UNIT ASSY M8 X 35 2.5 6 3IN 1 UNIT MOUNTING BRACKETS HEX FL SCR M8 X 20 2.0 - 2.5 7 FRAME ASSY MOUNTING NEAR A-MOUNT HEX FL BOLT M14X1.5X70 17.4 - 17.8 8 FRAME ASSY MOUNTING NEAR B-MOUNT HEX FL SCR M10X45 6.1 - 6.5
HV ELECTRICAL SYSTEM_ELR 30 SR. NO. DESCRIPTION FASTENER TIGHTENING TORQUE (Kg-m) LOCATION 9 ASSEMBLE FRAME ASSY (ON RH SIDE MOTOR MTG BRACKET) HEX FL SCR M12X55 10.8 10 ASSEMBLE FRAME ASSY (ON LH SIDE MOTOR ASSY MTG BRACKET) HEX FL SCR M10X65 6.2 - 6.3 11 ASSEMBLE A MOUNT FORGING BRACKET ON FRAME ASSY HEX FL SCR M12X55 10.6 - 11 12 ASSEMBLE A MOUNT FORGING BRACKET ON FRAME ASSY HEX FL SCR M10X45 6.1 - 6.5
HV ELECTRICAL SYSTEM_ELR 31 SR. NO. DESCRIPTION FASTENER TIGHTENING TORQUE (Kg-m) LOCATION 13 ASSEMBLE GUSSET BRACKETS ON FRAME ASSY HEX FL SCR M8x20 2.2 - 2.3 14 ASSEMBLE PLATE SUPPORT BRACKET HEX FL SCR M8x20 2.2 - 2.3 15 HIGH VOLTAGE BATTERY ASSY MTG (ELR) M10X1.25X55 4.9 16 C-MOUNT ASSY, E drive Hex Flange Bolt M12 X 1.25 X 105 STEEL CONFIRMING TO PROPORTY CLASS 10.9 QTY (1 NOS) 10.5 - 11
HV ELECTRICAL SYSTEM_ELR 32 SR. NO. DESCRIPTION FASTENER TIGHTENING TORQUE (Kg-m) LOCATION 17 BRACKET,CMOUNT HEX FL BOLT M14X1.5X95 TS17130 10.9 SS8451S2-YH QTY : 01 NOS. H/FL NUT AM14X1.5 TS17430 10SS8451S2-YH QTY. 01 NOS 19 - 19.5 18 BRACKET,CMOUNT H/FL BOLT M12X1.75X45 TS17130 10.9 SS8451S2-YH QTY: (5 NOS) 10.5 - 11 19 A-MOUNT ASSY HEX FL BOLT M10X1.25X40 TS17130-10.9 QTY: (4 NOS) HARDENED WASHER 10.5 TS17716 QTY: (4 NOS) 6 - 6.5 20 A-MOUNT ASSY HEX FL BOLT M14X1.5X55 (DIN) EN 1665 - 10.9 QTY: (3 NOS) 12.5 - 13
HV ELECTRICAL SYSTEM_ELR 33 SR. NO. DESCRIPTION FASTENER TIGHTENING TORQUE (Kg-m) LOCATION 21 B-MOUNT ASSY HEX FL SCR M10X1.25X30 TS17070 10.9 SS8451S2-YH QTY : (02 NOS) HARDENED WASHER 10.5 TS17716 QTY : (02 NOS) 6 – 6.5 22 B-MOUNT ASSY HEX FL BOLT M12X65 TS17130 10.9 SS8451S2-YH QTY : (03 NOS) WASHER M12 QTY : (03 NOS) 10.5 - 11 23 UNDERBODY H/FL SCR M8x20 (9Nos.),& Washer A8.4 (9Nos.) 1
HV ELECTRICAL SYSTEM_ELR 34 SR. NO. DESCRIPTION FASTENER TIGHTENING TORQUE (Kg-m) LOCATION 24 GUARD ASSY BATTERY UNDERBODY FL SCR M12X40 (2Nos.) WASHER A13 (2Nos.) & HEX FL SCR M6X12, WASHER A6.4 8 - For M12 & 1 - For M6 25 L-BRACKET ASSY (ELR) HEX FL SCR M6X12 1 26 BRACKET COMPRESSOR MTG HEX FL SCR M8X45 3.1 - 3.2 27 Compressor Mounting HEX SOCKET HEAD CAP SCR M8X110 (3Nos) 1.3 ± 0.1
HV ELECTRICAL SYSTEM_ELR 35 4. SPECIAL TOOLS LIST: SR.NO. DISCRIPTION PART NO TOOL IMAGE 1 Battery pack lifting hanger / E Drive lifting Hanger Tackle unit 512358902407 2 BATTERY PACK TORLLEY / SCISSOR LIFT 8855WORK0162 3 E Drive Fixture 512358902412 4 E Drive Fixture Attachment Kit (Upgrade) 512358902409
HV ELECTRICAL SYSTEM_ELR 36 SR.NO. DISCRIPTION PART NO TOOL IMAGE 5 Transmission Jack 8855WORK0083 6 TS20 TROX BIT WITH DRIVER 885551235801
HV ELECTRICAL SYSTEM_ELR 37 5. HV COMPONENTS DETAILS A. E-DRIVE EXPLODED VIEW MOTOR TECHNICAL SPECIFICATIONS Rated Voltage 330VDC Operating voltage 200 - 450 V DC Storage Temp. -40°C to +85°C Operating Temp. -10 to +85°C Power Output 120 KW Rated Speed 5000 RPM Nominal Current 210A Peak Torque 215Nm Rated Torque 103Nm Cooling Liquid Cooling Weight 66Kg (Approx. without Oil) TRANSAXLE TECHNICAL SPECIFICATIONS Transaxle Oil Synthetic SAE 75W90 BOT130M - CASTROL Oil Qty. 0.9L ± 0.1L
HV ELECTRICAL SYSTEM_ELR 38 B. 3IN1 UNIT ASSY 3In1 Unit Mechanical Specification (For WLR) Size 422 X 396.5 X 111 mm Weight 12.5 Kg Ingress Protection IP67, IP6K9K Ambient Temperature -40 to +85°C DC - DC Converter Specification (For ELR) Input Voltage 200 - 450V Input Current <12A Output Rated Voltage 13.8V DC Output Voltage Range 8 - 16V DC Output Rated Current 185A Output Rated Power 2.5KW Bi - Directional On Board Charger Specification (for ELR) AC Output voltage 220V ± 5% V2V output power 6 kW V2L output power 3.3 kVA
HV ELECTRICAL SYSTEM_ELR 39 C. HV BATTERY ASSY HV Battery Specification Description For ELR Pack Nominal Voltage 307.2 V Maximum Power, KW Maximum Torque, Nm Operating Voltage 240 to 350.4 V Pack Nominal Capacity 150 Ah Minimum Pack Energy 46.08 kWh (@0.33C) Total Weight 365 ± 12 kg Operating Temp. Range Charging: 0 to 55 °C Discharging: -25 to 55°C Continuous Charge Current 180 A Continuous Discharge Current 150 A Electric Motor Permanent Magnet Synchronous Motor AIO BMS BMS SW Version 2A
HV ELECTRICAL SYSTEM_ELR 40 D. HV SCHEMATICS (ELR)
HV ELECTRICAL SYSTEM_ELR 41 6. INSTRUCTION FOR WORKING ON HV COMPONENTS ON VEHICLE: 1. Turn off the vehicle Ignition. 2. Open the bonnet of the vehicle. 3. Remove Aux Battery negative terminal and Put masking tape on Aux Battery negative terminal & cable. 4. Disconnect HV & LV service disconnect switch. 5. Wait for 10 Min after disconnecting HV & LV service disconnect switch from vehicle for working on vehicle
HV ELECTRICAL SYSTEM_ELR 42 7. HV CONNECTOR CONNECTION & LOCKING PROCESS A. 3IN1 COMBO BOX TO MCU 1. Slide the primary lock in the direction of arrow. 2. Pull the lever as shown in image. 3. Disconnect the connector. B. 3IN1 COMBO BOX TO HV BATTERY 3IN1 SIDE CONNECTOR 1. Slide the primary lock in the direction of arrow. 2. Pull the lever as shown in image. 3. Disconnect the connector.
HV ELECTRICAL SYSTEM_ELR 43 HV BATTERY SIDE CONNECTOR 1. Slide the primary lock in the direction of arrow. 2. Pull the connector as shown in image. 3. Disconnect the connector. C. 3IN1 TO CCS PORT 3IN1 TO CCS PORT 1. Slide the primary lock in the direction of arrow. 2. Rotate the lever as shown in image. 3. Disconnect the connector.
HV ELECTRICAL SYSTEM_ELR 44 D. 3IN1 TO E-COMPRESSOR 3IN1 SIDE CONNECTOR 1. Press the primary lock suitably. 2. Slide the secondary lock outward direction as shown. 3. Disconnect the connector. E. COMPRESSOR SIDE CONNECTOR 1. Slide the primary lock outward direction as shown. 2. Push secondary lock. 3. Disconnect the connector.
HV ELECTRICAL SYSTEM_ELR 45 F. 3IN1 TO AC INPUT 1. Slide the primary lock in outward direction. 2. Press the secondary lock and disconnect the connector. G. 3IN1 TO PTC 1. Press the primary lock suitably. 2. Slide the secondary lock outward direction as shown. 3. Disconnect the connector.
HV ELECTRICAL SYSTEM_ELR 46 H. 3IN1 COMBO BOX TO SIGNAL 1. Slide the primary lock in the direction of arrow. 2. Pull the lever as shown in image.
HV ELECTRICAL SYSTEM_ELR 47 8. ISOLATION MEASUREMENT A. BEFORE DOING TEST FOLLOW SAFETY CHECKS Turn off Vehicle Ignition. Remove LV/Aux. Battery ve terminal. Remove HV Battery Manual Service Disconnect(MSD) Fuse. Check if all earth connections of components are connected to vehicle body/Chassis. B. AFTER ISOLATION RESISTANCE TEST Reconnect all HV connectors. Reconnect HV battery Manual Service Disconnect (MSD) Fuse. Reconnect LV/Aux battery ve terminal C. ISOLATION TESTER(ISOLATION TESTER) D. COMMON TEST PROCEDURE: 1. Connect test probes(+ve & -ve Probes) to the Isolation tester. 2. Turn ON Isolation tester and select appropriate voltage range i.e(500 V). 3. Connect +veterminal of Isolation tester Probes to Conductor. 4. Connect -veterminal of Isolation tester probe to vehicle chassis/component body. 5. Press and Hold Isolation tester’s test button. 6. Check isolation Resistance value on Isolation tester display & also check If voltage builds to 520 to 550 V. 7. If voltage doesn’t build to 500 V and Isolation resistance is less than 0.25 M Ohm there could be some issue in vehicle HV isolation. 8. To find out where is the issue refer isolation failure conditions. E. ISOLATION RESISTANCE VALUES Minimum Isolation Resistance when connected in System : >0.25 M ohm with >500 V Minimum Isolation Resistance of Individual Cable or Component : >10 M Ohm with >500 V F. ISOLATION RESISTANCE FAILURE CONDITIONS: 1. Isolation Failure Issue during Cranking / Running a. Isolation Resistance checking for E Compressor: Procedure – E Compressor & PTC Heater 1. Remove 3IN1 combo side E compressor HV connector. 2. Connect +ve terminal of Isolation tester to +ve terminal of removed connector & -ve terminal of Isolation tester to 3IN1. 3. Check Isolation resistance on Isolation tester display.IR value should be more than 0.25 M Ohm and voltage should build 520 to 550 V.
HV ELECTRICAL SYSTEM_ELR 48 4. Connect +ve terminal of Isolation tester to -ve terminal of removed connector & -ve terminal of Isolation tester to 3IN1body. 5. Check Isolation resistance on Isolation tester display.IR value should be more than 0.25 M Ohm and voltage should build 520 to 550 V. 6. If the isolation resistance value is acceptable limit then reconnect the connector. If Value is less than acceptable limit. 7. Remove E Compressor side connector. 8. Check isolation of individual cable in between cable Shield & conductor for both +ve and -ve terminal. 9. If Isolation in cable found ok then cable is ok & if not ok then isolation failure is in cable . 10.Then check E Compressor IR individually between it’s body & +ve terminal, body and –ve terminal. 11.If Isolation in E Compressor is found ok then E Compressor is ok & if not ok then isolation failure is in E Compressor. Note: Follow same procedure for checking PTC Heater isolation resistance. b. Isolation Resistance checking for E Drive: Procedure - E Drive: 1. Remove 3IN1 side E Drive HV connector. 2. Connect +ve terminal of Isolation tester to +ve terminal of removed connector & -ve terminal of Isolation tester to 3IN1 body. 3. Check Isolation resistance on Isolation tester display.IR value should be more than 0.25 M Ohm and voltage should build 520 to 550 V. 4. Connect +ve terminal of Isolation tester to -ve terminal of removed connector & -ve terminal of Isolation tester to 3IN1 body. 5. Check Isolation resistance on Isolation tester display.IR value should be more than 0.25 M Ohm and voltage should build 520 to 550 V. 6. If the isolation resistance value is acceptable limit then reconnect the connector. If Value is less than acceptable limit. 7. Remove E Drive side HV connector 8. Check isolation of individual cable in between cable Shield & conductor for both +veand - veterminal. 9. If Isolation in cable found ok then cable is ok & if not ok then Isolation failure is in cable. 10.Then check E Drive IR individually between it’s body & +ve terminal, body and –ve terminal. 11.If Isolation in E Drive is found ok then E Drive is ok & if not ok then isolation failure is in E Drive. c. HV Battery cable IR checking: Procedure - HV Battery cable 1. Remove 3IN1 side HV battery connector. 2. Connect +ve terminal of Isolation tester to +ve terminal of removed connector & -ve terminal of Isolation tester to 3IN1 body. 3. Check Isolation resistance on Isolation tester display.IR value should be more than 0.25 M Ohm and voltage should build 520 to 550 V. 4. Connect +ve terminal of Isolation tester to -ve terminal of removed connector & -ve terminal of Isolation tester to 3IN1 body. 5. Check Isolation resistance on Isolation tester display.IR value should be more than 0.25 M Ohm and voltage should build 520 to 550 V. 6. If the isolation resistance value is acceptable limit then reconnect the connector. If Value is less than acceptable limit. 7. Remove HV battery side connector. 8. Check isolation of individual cable in between cable Shield & conductor for both +veand - veterminal. 9. If Isolation in cable found ok then cable is ok & if not ok then Isolation failure is in cable. 10.Then check HV battery IR individually between it’s body & +ve, body and –ve terminal. 11.If Isolation in HV battery is found ok then HV battery is ok & if not ok then isolation failure is in HV battery.
HV ELECTRICAL SYSTEM_ELR 49 2. Isolation Failure Issue during Fast Charging Procedure:- 1. Connect +ve terminal of Isolation tester to +ve terminal of vehicle charging inlet DC +ve. 2. Connect -ve terminal of Isolation tester to protective earth in vehicle charging inlet. 3. Check Isolation resistance on Isolation tester display.IR value should be more than 0.25 M Ohm and voltage should build 520 to 550 V. 4. Connect +ve terminal of Isolation tester to -ve terminal of vehicle charging inlet DC -ve. 5. Connect -ve terminal of Isolation tester to protective earth in vehicle charging inlet. 6. Check Isolation resistance on Isolation tester display.IR value should be more than 0.25 M Ohm and voltage should build 520 to 550 V. If Value is less than acceptable limit. 7. Remove 3IN1 side fast charging connector. 8. Check isolation of individual cable in between cable Shield & conductor for both +ve and -ve terminal. 9. If Isolation in cable found ok then cable is ok & if not ok then Isolation failure is in cable. 3. HV cables water entry check points for field testing :- 1. Visual check for cable and connectors damage. If Damage observed shall not be fitted. 2. Dry the connector using blower. 3. Check isolation measurement and continuity test.(IR value should be > 10MΩ @ 500V). 4. Jet spray the engine compartment area with water. (As per the pressure values specified for engine compartment washing). 5. Soak the vehicle for 2hr. 6. Repeat Step 3. 7. If IR values are OK then cable is healthy.
HV ELECTRICAL SYSTEM_ELR 50 9. HV COMPONENT IN UNDER BONNET COMPARTMENT A. 3IN1 UNIT ASSY REMOVAL 1. Refer Instructions for working on HV Components mention before starting work. 2. Refer Instructions of HV connector Lock removal process before starting work. 3. Remove the mounting screw and take out Front Frunk Assembly. 4. Remove Front Frunk Assembly Bracket. 5. Remove 3in1 LV signal connector and harness. 6. Remove the AC compressor connector and harness from 3in1. 7. Remove the AC input connector and cable of charger from 3in1 unit. 8. Remove the PTC connector and harness from 3in1 unit.
HV ELECTRICAL SYSTEM_ELR 51 9. Remove the ground terminal cable screw from 3in1 unit. 10. Remove the LVDC+ terminal cable screw from 3in1 unit. 11. Remove Fast charging connector and harness from 3in1 unit. 12. Remove HV battery connector and harness from 3in1 unit. 13. Remove MCU battery connector and harness from 3in1 unit. 14. Drain Coolant and remove Hose connection on 3in1 Unit Assy. (Refer coolant draining procedure).
HV ELECTRICAL SYSTEM_ELR 52 15. Remove the four mounting screws from the bracket and safely remove the 3in1 Unit Assy having weight 12.5 kg. Fitment Follow reverse procedure for assembly. NOTE If any issues of DTC related to OBC, DC - DC Converter need to replace 3in1 Unit. For PDU related DTC issue, PDU serviceability need to perform. B. SERVICIABLE ITEM 3IN1 UNIT Function Component RATING PART NUMBER Quantity IMAGE OBC FUSE 50A/500V 512380559902 1 AC Compressor 30A/500V 512380559903 1 PTC 20A/500V 512380559901 1 FAST CHARGING 250A/500V 547280559903 1 MCU 350A/500V 547280559904 1 MCU Contactor Relay 250A/450V 512380559908 1 PTC 10A/450V 512380559909 1 FAST CHARGING +VE 250A/450V 512380559906 1 FAST CHARGING -VE 250A/450V 512380559907 1
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