Battery Control System (Service Information): Overview Toyota Prius C I facelift

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1. INSPECT FOR COOLANT LEAK (for Inverter) Remove the reserve tank cap. WARNING: To avoid the danger of being burned, do not remove the reserve tank cap while the coolant for the inverter is still hot. Install a radiator cap tester. Pump the radiator cap tester to 122 kPa (1.2 kgf/ cm 2 , 18 psi), and then check that the pressure does not drop. HINT: If the pressure drops, check the hoses, radiator, inverter water pump assembly, inverter with converter, and hybrid vehicle transaxle assembly for leaks. Reinstall the reserve tank cap.
2. INSPECT COOLANT LEVEL IN RESERVE TANK (for Inverter) The coolant should be between the low and full lines when the coolant for the inverter is cold. HINT: If the coolant level is low, check for leaks and add TOYOTA Super Long Life Coolant (SLLC) or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, and non-borate coolant with long-life hybrid organic acid technology up to the full line.
3. INSPECT COOLANT (for Inverter) Remove the reserve tank cap. WARNING: To avoid the danger of being burned, do not remove the reserve tank cap while the coolant for the inverter is still hot. Check for excessive deposits of rust or scale on and around the reserve tank cap and its opening. HINT: If excessively dirty, replace the coolant for the inverter. Reinstall the reserve tank cap.
4. INSPECT RESERVE TANK CAP (for Inverter) Inspect the reserve tank cap. TEXT IN ILLUSTRATION *1 O-ring *2 Rubber Packing If there are water stains or foreign matter on the O-ring, clean it with water and finger scouring. NOTE: Do not use any tools. Check that the O-ring is not deformed, cracked, or damaged. Check that the O-ring is not swollen. Check the reserve tank cap operation. TEXT IN ILLUSTRATION *1 Radiator Cap Tester *2 Reserve Tank Cap *a 30° or more Apply coolant (for inverter) to the O-ring and rubber packing before using a radiator cap tester. Install the reserve tank cap to the radiator cap tester. Pump the cap tester several times, and check the maximum pressure. JUDGMENT CRITERION Standard value (for brand-new cap) 94 to 122 kPa (1.0 to 1.2 kgf/cm 2 , 13.6 to 18 psi) Minimum standard value (for used cap) 94 kPa (1.0 kgf/cm 2 , 13.6 psi) Pump speed 1 pump per second NOTE: When using the cap tester, tilt it upward 30° or more. HINT: If the maximum pressure is less than the minimum standard value, replace the reserve tank cap.

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1. DRAIN COOLANT (for Inverter) NOTE: Do not reuse the drained coolant because it may contain foreign matter. Collect the drained coolant and measure its volume to establish a benchmark. When adding coolant, make sure to add more coolant than the measured amount. Remove the reserve tank cap. WARNING: To avoid the danger of being burned, do not remove the reserve tank cap while the coolant for the inverter is still hot. Loosen the radiator drain cock plug and drain the coolant. WARNING: Use caution when handling coolant immediately after driving or in summer because it may be hot. Tighten the radiator drain cock plug.
2. ADD COOLANT (for Inverter) NOTE: Do not reuse the drained coolant because it may contain foreign matter. If the vehicle is driven with air in the inverter cooling system, damage may occur and the following DTCs may be stored. DTC Code Detection Item P0A01-726 Motor Electronics Coolant Temperature Sensor Circuit Range / Performance P0A04-725 Motor Electronics Coolant Temperature Sensor Circuit Intermittent P0A08-264 DC / DC Converter Status Circuit P0A78-284 Drive Motor "A" Inverter Performance P0A78-286 Drive Motor "A" Inverter Performance P0A7A-322 Generator Inverter Performance P0A7A-324 Generator Inverter Performance P0A93-346 Inverter Cooling System Performance P0A94-553 DC / DC Converter Performance P0A94-557 DC / DC Converter Performance P0AEE-277 Motor Inverter Temperature Sensor "A" Circuit Range / Performance P0AF1-276 Drive Motor Inverter Temperature Sensor "A" Circuit Intermittent / Erratic P0BCD-315 Generator Inverter Temperature Sensor Circuit Range / Performance P0BD0-314 Generator Inverter Temperature Sensor Circuit Intermittent / Erratic P0C39-626 DC / DC Converter Temperature Sensor "A" Range / Performance P0C3C-625 DC / DC Converter Temperature Sensor "A" Intermittent / Erratic P0C3E-628 DC / DC Converter Temperature Sensor "B" Range / Performance P0C41-627 DC / DC Converter Temperature Sensor "B" Intermittent / Erratic P0C73-776 Motor Electronics Coolant Pump "A" Control Performance Slowly pour coolant into the reserve tank until it reaches the full line. Coolant quantity 1.6 liters (1.7 US qts, 1.4 Imp. qts.) NOTE: To prevent foreign matter such as dust or dirt from entering the cooling system, make sure to confirm that the container used to add coolant is clean and free of foreign matter such as dust or dirt. When using the Techstream: Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Enter the following menus: Powertrain / Hybrid Control / Active Test / Activate the Water Pump. Keep the coolant at the full line in the reserve tank to compensate for the drop in coolant level when the air bleeds. Standard Air bleeding from the inverter cooling system is completed when the noise made by the inverter water pump assembly becomes smaller and the circulation of coolant in the reserve tank improves. HINT: If free spinning of the inverter water pump is detected for approximately 5 seconds, fail-safe control will be activated to suspend the operation of the pump for approximately 15 seconds and resume operation for approximately 4 seconds repeatedly. Operation of the inverter water pump will return to normal if coolant is added. A loud noise made by the inverter water pump assembly and poor circulation of coolant in the reserve tank indicates that there is air in the cooling system. When not using the Techstream: Turn the ignition switch to ON (READY). [*1] Turn the ignition switch off and add coolant to the full line because the coolant level drops as the air bleeds. [*2] NOTE: Be sure to turn the ignition switch off before adding SLLC. Do not work on the components in the engine compartment while the vehicle is in the READY-on state because the engine is in intermittent operation. Repeat steps [*1] and [*2] until air bleeding from the cooling system is completed. Standard Air bleeding from the inverter cooling system is completed when the noise made by the inverter water pump assembly becomes smaller and the circulation of coolant in the reserve tank improves. HINT: A loud noise made by the inverter water pump assembly and poor circulation of coolant in the reserve tank indicates that there is air in the cooling system. After the air is completely bled from the cooling system, tighten the reserve tank cap. Add coolant to the full line of the reserve tank.
3. INSPECT FOR COOLANT LEAK (for Inverter) See step 1

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1. PRECAUTION Refer to «PRECAUTION [12/2013 - ]»(ref-651169-S11524377852014081900000)
2. REMOVE SERVICE PLUG GRIP Refer to «REMOVAL [12/2013 - ]»(ref-651170-S34824767592014081900000)
3. DRAIN COOLANT (for Inverter) See step 1
4. DISCONNECT ENGINE ROOM MAIN WIRE WARNING: Wear insulated gloves. NOTE: Insulate the disconnected terminals with insulating tape. Cover the hole where the cable was connected with tape or equivalent (non-residue type) to prevent entry of foreign matter. To prevent damage due to static electricity, do not touch the terminals of the disconnected connectors. Raise the lock lever and disconnect the inverter with converter connector. Disconnect the engine wire from the engine room main wire. Disconnect the hose clamp. NOTE: Do not remove the hose clamp from the hose. Remove the 2 bolts. Disconnect the clamp and engine room main wire.
5. REMOVE INVERTER TERMINAL COVER WARNING: Wear insulated gloves. Remove the 2 bolts and inverter terminal cover. TEXT IN ILLUSTRATION *1 Interlock Connector WARNING: An interlock connector is installed to the inverter terminal cover. Make sure to remove the inverter terminal cover before removing the inverter cover. NOTE: Make sure to pull the inverter cover straight up, as a connector is connected to the bottom of the cover.
6. REMOVE INVERTER COVER WARNING: Wear insulated gloves. Remove the 7 bolts and inverter cover. WARNING: An interlock connector is installed to the inverter terminal cover. Make sure to remove the inverter terminal cover before removing the inverter cover.
7. CHECK TERMINAL VOLTAGE WARNING: Wear insulated gloves. NOTE: Do not allow any foreign matter or water to enter the inverter with converter assembly. Using a voltmeter, measure the voltage between the terminals of the 2 phase connectors. Standard voltage 0 V HINT: Use measuring range of DC 750 V or more on the voltmeter.
8. DISCONNECT FRAME WIRE WARNING: Wear insulated gloves. NOTE: Insulate the disconnected terminals with insulating tape. Cover the hole where the cable was connected with tape or equivalent (non-residue type) to prevent entry of foreign matter. Disconnect the harness clamp. Remove the 4 bolts, and disconnect the frame wire (high voltage cables of the hybrid battery) from the inverter with converter assembly.
9. DISCONNECT MOTOR CABLE WARNING: Wear insulated gloves. NOTE: Insulate the disconnected terminals with insulating tape. Cover the hole where the cable was connected with tape or equivalent (non-residue type) to prevent entry of foreign matter. Disconnect the motor cable (for MG 1) Remove the 5 bolts, and disconnect the high voltage cables of the motor cable for (MG1) from the inverter with converter assembly. Disconnect the motor cable (for MG 2) Remove the 5 bolts, and disconnect the high voltage cables of the motor cable (for MG2) from the inverter with converter assembly.
10. DISCONNECT NO. 2 ENGINE WIRE WARNING: Wear insulated gloves. NOTE: Insulate the disconnected terminals with insulating tape. Cover the hole where the cable was connected with tape or equivalent (non-residue type) to prevent entry of foreign matter. Remove the bolt (A). Remove the 4 bolts (B), and disconnect the No. 2 engine wire (high voltage cables for the air conditioning compressor) from the inverter with converter assembly.
11. INSTALL INVERTER COVER WARNING: Wear insulated gloves. Temporarily install the inverter cover with the 7 bolts to prevent any foreign matter or water from entering the inverter with converter assembly. NOTE: Visually confirm that the inverter cover waterproofing rubber is securely installed before installing the upper inverter cover.
12. INSTALL INVERTER TERMINAL COVER WARNING: Wear insulated gloves. Temporarily install the inverter terminal cover with the 2 bolts to prevent any foreign matter or water from entering the inverter with converter assembly. TEXT IN ILLUSTRATION *1 Interlock Connector NOTE: Visually confirm that the inverter cover waterproofing rubber is securely installed before installing the inverter terminal cover. Make sure that the interlock is fully engaged.
13. DISCONNECT WIRE HARNESS Remove the relay block cover. Disconnect the connector. Disengage the 2 claws and remove the No. 1 relay block cover. Remove the nut and disconnect the wire harness.
14. DISCONNECT NO. 1 INVERTER COOLING HOSE ASSEMBLY Release the retainer and disconnect the No. 1 inverter cooling hose assembly from the inverter with converter assembly. TEXT IN ILLUSTRATION *1 Retainer Put pieces of cloth into the pipes and in the disconnected hose, or cover the pipes and hoses with plastic bags as shown in the illustration to prevent foreign matter from entering the cooling system and to prevent coolant from spilling near the inverter with converter assembly.
15. DISCONNECT NO. 2 INVERTER COOLING HOSE ASSEMBLY Release the retainer and disconnect the No. 2 inverter cooling hose assembly from the inverter with converter assembly. TEXT IN ILLUSTRATION *1 Retainer Put pieces of cloth into the pipes and in the disconnected hoses, or cover the pipes and hose with plastic bags as shown in the illustration to prevent foreign matter from entering the cooling system and to prevent coolant from spilling near the inverter with converter assembly.
16. REMOVE INVERTER WITH CONVERTER ASSEMBLY WARNING: Wear insulated gloves. Temporarily secure the No. 3 engine room wire with the inverter with converter assembly protector as shown in the illustration. TEXT IN ILLUSTRATION *1 Protector HINT: To prevent the No. 2 engine room wire from getting caught by other components, connect it to the protector before removing the inverter with converter assembly. Remove the 3 bolts and inverter with converter assembly. NOTE: Since the inverter with converter assembly is very heavy, 2 people are needed to remove the inverter with converter assembly. When removing the inverter with converter assembly, do not damage the parts around it. To prevent damage, do not hold the inverter with converter assembly by the connectors. To prevent damage due to static electricity, do not touch the terminals of the disconnected connectors. Even after the coolant is drained, coolant remains in the inverter due to its internal structure. Therefore, seal or cover the pipes when removing the inverter so that coolant does not spill out.
17. REMOVE HIGH VOLTAGE FUSE WARNING: Wear insulated gloves. HINT: Perform this procedure only when replacement of the high voltage fuse is necessary. Remove the 2 bolts and inverter terminal cover. TEXT IN ILLUSTRATION *1 Interlock Connector NOTE: Make sure to pull the inverter cover straight up, as a connector is connected to the bottom of the cover. Remove the 7 bolts and inverter cover. Remove the 2 bolts and high voltage fuse from the inverter with converter assembly. NOTE: Do not allow any foreign matter or water to enter the inverter with converter assembly. Temporarily install the inverter cover with the 7 bolts to prevent any foreign matter or water from entering the inverter with converter assembly. NOTE: Visually confirm that the inverter cover waterproofing rubber is securely installed before installing the inverter cover. Temporarily install the inverter terminal cover with the 2 bolts to prevent any foreign matter or water from entering the inverter with converter assembly. TEXT IN ILLUSTRATION *1 Interlock Connector NOTE: Visually confirm that the inverter terminal cover waterproofing rubber is securely installed before installing the inverter terminal cover. Make sure that the interlock is fully engaged.

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1. INSTALL HIGH VOLTAGE FUSE WARNING: Wear insulated gloves. HINT: Perform this procedure only when replacement of the high voltage fuse is necessary. Remove the 2 bolts and inverter terminal cover. TEXT IN ILLUSTRATION *1 Interlock Connector NOTE: Make sure to pull the inverter cover straight up, as a connector is connected to the bottom of the cover. Remove the 7 bolts and inverter cover. Install the high voltage fuse with the 2 bolts. TEXT IN ILLUSTRATION *a Correct *b Incorrect Torque: 5.0 N*m (51 kgf*cm, 44 in.*lbf) NOTE: Be sure to use a torque wrench to tighten the bolts. The fuse should be installed with its orientation as shown in the illustration. Temporarily install the inverter cover with the 7 bolts to prevent any foreign matter or water from entering the inverter with converter assembly. NOTE: Visually confirm that the inverter cover waterproofing rubber is securely installed before installing the inverter cover. Temporarily install the inverter terminal cover with the 2 bolts to prevent any foreign matter or water from entering the inverter with converter assembly. TEXT IN ILLUSTRATION *1 Interlock Connector NOTE: Visually confirm that the inverter terminal cover waterproofing rubber is securely installed before installing the inverter terminal cover. Make sure that the interlock is fully engaged.
2. INSTALL INVERTER WITH CONVERTER ASSEMBLY WARNING: Wear insulated gloves. Temporarily install the inverter with converter assembly with the 3 bolts. NOTE: Since the inverter with converter assembly is very heavy, 2 people are needed to install the inverter with converter assembly. When installing the inverter with converter assembly, do not damage the parts around it. To prevent damage, do not hold the inverter with converter assembly by the connectors. To prevent damage due to static electricity, do not touch the terminals of the disconnected connectors. Tighten bolt (A). Torque: 12 N*m (122 kgf*cm, 8 ft.*lbf) Tighten the 2 bolts (B). Torque: 12 N*m (122 kgf*cm, 8 ft.*lbf) Disconnect the No. 2 engine room wire from the protector.
3. CONNECT NO. 1 INVERTER COOLING HOSE ASSEMBLY Connect the No. 1 inverter cooling hose assembly to the inverter with converter assembly and lock the hose with the retainer. TEXT IN ILLUSTRATION *1 Retainer NOTE: Insert the retainer until a click sound is heard. Pull on the hose to confirm that the hose is securely connected. If there is foreign matter on the union or the O-ring, clean it with water and finger scouring. To prevent foreign matter from entering the cooling system, do not remove the pieces of cloth or plastic bags from the pipe and disconnected hose until installation.
4. CONNECT NO. 2 INVERTER COOLING HOSE ASSEMBLY Connect the No. 2 inverter cooling hose assembly to the inverter with converter assembly and lock the hose with the retainer. TEXT IN ILLUSTRATION *1 Retainer NOTE: Insert the retainer until a click sound is heard. Pull on the hose to confirm that the hose is securely connected. If there is foreign matter on the union or the O-ring, clean it with water and finger scouring. To prevent foreign matter from entering the cooling system, do not remove the pieces of cloth or plastic bags from the pipe and disconnected hose until installation.
5. CONNECT WIRE HARNESS Install the wire harness with the nut. Torque: 8.4 N*m (86 kgf*cm, 74 in.*lbf) Install the No. 1 relay block cover with the 2 claws. Connect the connector. Install the relay block cover.
6. REMOVE INVERTER TERMINAL COVER WARNING: Wear insulated gloves. Remove the 2 bolts and inverter terminal cover. TEXT IN ILLUSTRATION *1 Interlock Connector NOTE: Make sure to pull the inverter cover straight up, as a connector is connected to the bottom of the cover.
7. REMOVE INVERTER COVER WARNING: Wear insulated gloves. Remove the 7 bolts and inverter cover.
8. CONNECT NO. 2 ENGINE WIRE WARNING: Wear insulated gloves. NOTE: Do not allow any foreign matter or water to enter the inverter with converter assembly. Temporarily install the No. 2 engine wire (high voltage cables of the air conditioning) with the 2 bolts (A) and 2 bolts (B) to the inverter with converter assembly. NOTE: To prevent the threads from being damaged, make sure to perform this step by hand. Fully tighten the 2 bolts (A). Torque: 9.2 N*m (94 kgf*cm, 81 in.*lbf) NOTE: Be sure to use a torque wrench to tighten the bolts. Fully tighten the 2 bolts (B). Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf) NOTE: Be sure to use a torque wrench to tighten the bolts. Install the bracket with the bolt (C). Torque: 9.4 N*m (96 kgf*cm, 83 in.*lbf)
9. CONNECT MOTOR CABLE WARNING: Wear insulated gloves. NOTE: Do not allow any foreign matter or water to enter the inverter with converter assembly. Connect the motor cable (MG2). Temporarily install the high voltage cable of the motor cable (MG2) with the 5 bolts to the inverter with converter assembly. NOTE: To prevent the threads from being damaged, make sure to perform this step by hand. Fully tighten the 2 bolts (A). Torque: 9.2 N*m (94 kgf*cm, 81 in.*lbf) NOTE: Be sure to use a torque wrench to tighten the bolts. Fully tighten the 3 bolts (B). Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf) NOTE: Be sure to use a torque wrench to tighten the bolts. Connect the harness clamp. Connect the motor cable (MG1). Temporarily install the high voltage cable of the motor cable (MG1) with the 5 bolts to the inverter with converter assembly. NOTE: To prevent the threads from being damaged, make sure to perform this step by hand. Fully tighten the 2 bolts (A). Torque: 9.2 N*m (94 kgf*cm, 81 in.*lbf) NOTE: Be sure to use a torque wrench to tighten the bolts. Fully tighten the 3 bolts (B). Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf) NOTE: Be sure to use a torque wrench to tighten the bolts.
10. CONNECT FRAME WIRE WARNING: Wear insulated gloves. NOTE: Do not allow any foreign matter or water to enter the inverter with converter assembly. Temporarily install the frame wire (high voltage cables of the hybrid battery) with the 4 bolts to the inverter with converter assembly. TEXT IN ILLUSTRATION *1 Interlock Connector *2 High voltage cables of hybrid battery *a Front view of frame wire connector NOTE: Make sure that the interlock connector are fully engaged. To prevent the threads from being damaged, make sure to perform this step by hand. Fully tighten the 2 bolts (A). Torque: 9.2 N*m (94 kgf*cm, 81 in.*lbf) NOTE: Be sure to use a torque wrench to tighten the bolts. Fully tighten the 2 bolts (B). Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf) NOTE: Be sure to use a torque wrench to tighten the bolts. Connect the harness clamp.
11. CHECK HIGH VOLTAGE CABLE CONNECTION WARNING: Wear insulated gloves. NOTE: Do not allow any foreign matter or water to enter the inverter with converter assembly. Check that each connector and terminal is firmly installed. NOTE: Make sure that the bolts are fully tightened.
12. INSTALL INVERTER COVER WARNING: Wear insulated gloves. Temporarily install the inverter cover with the 7 bolts to the inverter with converter assembly. WARNING: An interlock connector is installed to the inverter terminal cover. Make sure to install the inverter terminal cover after installing the inverter cover. NOTE: Visually confirm that the inverter cover waterproofing rubber is securely installed before installing the inverter cover. Fully tighten the bolt (A). Torque: 11 N*m (112 kgf*cm, 8 ft.*lbf) Fully tighten the bolt (B). Torque: 11 N*m (112 kgf*cm, 8 ft.*lbf) Fully tighten the 5 bolts (C). Torque: 11 N*m (112 kgf*cm, 8 ft.*lbf)
13. INSTALL INVERTER TERMINAL COVER WARNING: Wear insulated gloves. Temporarily install the inverter terminal cover with the 2 bolts to the inverter with converter assembly. TEXT IN ILLUSTRATION *1 Interlock Connector WARNING: An interlock connector is installed to the inverter terminal cover. Make sure to install the inverter terminal cover after installing the inverter cover. NOTE: Visually confirm that the inverter terminal cover waterproofing rubber is securely installed before installing the inverter terminal cover. Make sure that the interlock connector is fully engaged. Fully tighten the bolt (A). Torque: 11 N*m (112 kgf*cm, 8 ft.*lbf) Fully tighten the bolt (B). Torque: 11 N*m (112 kgf*cm, 8 ft.*lbf)
14. INSTALL ENGINE ROOM MAIN WIRE WARNING: Wear insulated gloves. NOTE: Do not allow any foreign matter or water to enter the inverter with converter assembly. Connect the clamp. Connect the engine room main wire with the 2 bolts. Torque: 9.4 N*m (96 kgf*cm, 83 in.*lbf) Connect the hose clamp. Connect the engine wire to the engine room main wire. NOTE: Make sure that the interlock is fully engaged. Connect the connector to the inverter with converter assembly and lock the connector with the lock lever.
15. INSTALL SERVICE PLUG GRIP Refer to «INSTALLATION [12/2013 - ]»(ref-651170-S24136932772014081900000).
16. ADD COOLANT (for Inverter) See step 2
17. INSPECT FOR COOLANT LEAK (for Inverter) See step 1

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1. PRECAUTION Refer to «PRECAUTION [12/2013 - ]»(ref-651169-S11524377852014081900000)
2. REMOVE SERVICE PLUG GRIP Refer to «REMOVAL [12/2013 - ]»(ref-651170-S34824767592014081900000)
3. REMOVE REAR SEAT CUSHION ASSEMBLY . Refer to «REMOVAL [12/2013 - ] - Step 8»(/toyota/prius-c/i-facelift-2014-2020/remont/seats/#seats-service-information)
4. REMOVE REAR SEAT CUSHION LEG SUB-ASSEMBLY Remove the 4 bolts and rear seat cushion leg sub-assembly.
5. REMOVE INVERTER TERMINAL COVER See step 5
6. REMOVE INVERTER COVER See step 6
7. CHECK TERMINAL VOLTAGE See step 7
8. INSTALL INVERTER COVER See step 12
9. INSTALL INVERTER TERMINAL COVER See step 13
10. REMOVE NO. 1 HYBRID BATTERY EXHAUST DUCT Remove the clip and No. 1 hybrid exhaust duct.
11. REMOVE WIRE HARNESS Disconnect the 2 connectors and clamp.
12. REMOVE HYBRID BATTERY SERVICE PLUG COVER Remove the 2 nuts and hybrid battery service plug cover.
13. REMOVE NO. 1 HYBRID BATTERY SHIELD SUB-ASSEMBLY WARNING: Wear insulated gloves. Remove the bolt and electric vehicle battery plug as shown in the illustration. Remove the 2 bolts, 2 nuts and No. 1 hybrid shield sub-assembly.
14. REMOVE NO. 2 HYBRID VEHICLE BATTERY CARRIER BRACKET SUB-ASSEMBLY WARNING: Wear insulated gloves. Disconnect the connector. Remove the bolt and 2 nuts. Disconnect the 3 clamps and remove the No. 2 hybrid vehicle battery carrier bracket sub-assembly.
15. REMOVE BATTERY SMART UNIT WARNING: Wear insulated gloves. Disengage the 2 claws to remove the wiring harness protector cover from the battery smart unit connector. Disconnect the battery smart unit connector. NOTE: Insulate the removed terminals with insulating tape. Remove the wiring harness protector from the battery smart unit connector. Remove the bolt and battery smart unit from the HV battery.

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1. INSTALL BATTERY SMART UNIT WARNING: Wear insulated gloves. Install the battery smart unit to the HV battery with the bolt. TEXT IN ILLUSTRATION *a Red Label Torque: 7.5 N*m (76 kgf*cm, 66 in.*lbf) NOTE: Check color of the label. Install the wiring harness protector to the battery smart unit connector. Connect the battery smart unit connector. NOTE: The connector should be connected securely. Engage the 2 claws to install the wiring harness protector cover to the battery smart unit connector.
2. INSTALL NO. 2 HYBRID VEHICLE BATTERY CARRIER BRACKET SUB-ASSEMBLY WARNING: Wear insulated gloves. Install the No. 2 hybrid vehicle battery carrier bracket sub-assembly with the bolt and 2 nuts. Torque: 7.5 N*m (76 kgf*cm, 66 in.*lbf) Connect the 3 clamps. Connect the connector. NOTE: The connector should be connected securely.
3. INSTALL NO. 1 HYBRID BATTERY SHIELD SUB-ASSEMBLY WARNING: Wear insulated gloves. Install the No. 1 hybrid battery shield sub-assembly with the 2 bolts and 2 nuts. Torque: 7.5 N*m (76 kgf*cm, 66 in.*lbf) Install the electric vehicle battery plug with the bolt as shown in the illustration. Torque: 7.5 N*m (76 kgf*cm, 66 in.*lbf)
4. INSTALL HYBRID BATTERY SERVICE PLUG COVER WARNING: Wear insulated gloves. Install the hybrid battery service plug cover with the 2 nuts. Torque: 7.5 N*m (76 kgf*cm, 66 in.*lbf)
5. CONNECT WIRE HARNESS Connect the 2 connectors and clamp.
6. INSTALL NO. 1 HYBRID BATTERY EXHAUST DUCT Install the No. 1 hybrid battery exhaust duct with the clip.
7. INSTALL REAR SEAT CUSHION LEG SUB-ASSEMBLY Temporarily install the rear seat cushion leg sub-assembly with the 4 bolts. Tighten the bolt (A). Torque: 42 N*m (428 kgf*cm, 31 ft.*lbf) Tighten the bolt (B). Torque: 42 N*m (428 kgf*cm, 31 ft.*lbf) Tighten the 2 bolts (C). Torque: 42 N*m (428 kgf*cm, 31 ft.*lbf)
8. INSTALL REAR SEAT CUSHION ASSEMBLY . Refer to «INSTALLATION [12/2013 - ] - Step 2»(/toyota/prius-c/i-facelift-2014-2020/remont/seats/#seats-service-information)
9. INSTALL SERVICE PLUG GRIP Refer to «INSTALLATION [12/2013 - ]»(ref-651170-S24136932772014081900000)

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1. PRECAUTION Refer to «PRECAUTION [12/2013 - ]»(ref-651169-S11524377852014081900000)
2. CHECK FOR DTCS Check for DTCs. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-651311-S30026564902014081900000). NOTE: Confirm that P0AA6 (Hybrid Battery Voltage System Isolation Fault) is not output before removing or installing the HV battery. If this DTC is output, perform troubleshooting for this DTC first.
3. REMOVE SERVICE PLUG GRIP Refer to «REMOVAL [12/2013 - ]»(ref-651170-S34824767592014081900000)
4. REMOVE REAR SEAT CUSHION ASSEMBLY . Refer to «REMOVAL [12/2013 - ] - Step 8»(/toyota/prius-c/i-facelift-2014-2020/remont/seats/#seats-service-information)
5. REMOVE REAR SEAT CUSHION LEG SUB-ASSEMBLY See step 4
6. REMOVE INVERTER TERMINAL COVER See step 5
7. REMOVE INVERTER COVER See step 6
8. CHECK TERMINAL VOLTAGE See step 7
9. INSTALL INVERTER COVER See step 12
10. INSTALL INVERTER TERMINAL COVER See step 13
11. REMOVE NO. 1 HYBRID BATTERY EXHAUST DUCT See step 10
12. REMOVE BATTERY COOLING BLOWER ASSEMBLY NOTE: Be sure not to touch the fan part of the battery cooling blower assemblies. Do not lift the battery cooling blower assemblies using the wire harness. Disconnect the battery cooling blower assembly connector and clamp. Remove the 2 bolts, nut and battery cooling blower assembly.
13. REMOVE NO. 1 HYBRID VEHICLE BATTERY COVER PANEL LH See step 12
14. REMOVE NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY. Refer to «REMOVAL [12/2013 - ] - Step 2»(ref-651351-S03744281642014081900000)
15. REMOVE WIRE HARNESS Disconnect the 2 connectors and 3 clamps as shown in the illustration. Disconnect the connector as shown in the illustration.
16. DISCONNECT FRAME WIRE See step 13
17. REMOVE HV BATTERY WARNING: Wear insulating gloves. NOTE: When removing/installing/moving the HV battery, make sure not to tilt it more than 80°. Remove the 2 clips. Remove the 2 bolts and 2 nuts. Remove the HV battery. TEXT IN ILLUSTRATION *a Area A *b Attachment NOTE: When moving the HV battery, be sure to hold area A shown in the illustration. Place the HV battery on the attachment.
18. REMOVE HYBRID BATTERY SERVICE PLUG COVER See step 12
19. REMOVE NO. 1 HYBRID BATTERY SHIELD SUB-ASSEMBLY See step 13
20. REMOVE NO. 2 HYBRID VEHICLE BATTERY CARRIER BRACKET SUB-ASSEMBLY See step 14
21. REMOVE BATTERY SMART UNIT See step 15
22. REMOVE NO. 2 HYBRID BATTERY SHIELD SUB-ASSEMBLY WARNING: Wear insulating gloves. Remove the 2 bolts, nut and No. 2 hybrid battery shield sub-assembly.
23. REMOVE HYBRID BATTERY JUNCTION BLOCK ASSEMBLY See step 15
24. REMOVE NO. 1 HYBRID BATTERY COVER INTAKE DUCT WARNING: Wear insulating gloves. Disconnect the HV battery thermistor. Remove the clip and No. 1 hybrid battery cover intake duct.
25. REMOVE UPPER HYBRID BATTERY COVER SUB-ASSEMBLY WARNING: Be sure to wear insulated gloves and protective goggles. Remove the 5 nuts and upper hybrid battery cover sub-assembly.
26. DISCONNECT NO. 1 HYBRID BATTERY PACKING WARNING: Be sure to wear insulated gloves and protective goggles. Disconnect the 2 clamps. Disconnect the 2 wire harnesses and remove the No. 1 hybrid battery packing.

See also:
• REMOVAL [12/2013 - ] - Step 8
• REMOVAL [12/2013 - ] - Step 1