| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001N36I |
| Model Year Start: 2021 | Model: Corolla | Prod Date Range: [04/2020 - 09/2022] |
| Title: HYBRID / BATTERY CONTROL: HV RELAY ASSEMBLY (for LITHIUM-ION BATTERY): REMOVAL; 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022] | ||
REMOVAL
CAUTION / NOTICE / HINT
The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during HV battery junction block assembly removal/installation are shown below.
Necessary Procedures After Parts Removed/Installed/Replaced
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Replaced Part or Performed Procedure |
Necessary Procedure |
Effect/Inoperative Function when Necessary Procedure not Performed |
Link |
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Auxiliary battery terminal is disconnected/reconnected |
Perform steering sensor zero point calibration |
Lane Control System |
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Pre-collision System |
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Replacement of HV battery junction block assembly |
Current sensor offset learning |
DTCs are stored |
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CAUTION:
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Orange wire harnesses and connectors indicate high-voltage circuits. To prevent electric shock, always follow the procedure described in the repair manual.
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![2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with P610): PRECAUTION](/t3Portal/stylegraphics/info.gif)
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To prevent electric shock, wear insulated gloves when working on wire harnesses and components of the high voltage system.
NOTICE:
After the power switch is turned off, the radio and display receiver assembly records various types of memory and settings. As a result, after turning the power switch off, make sure to wait at least 85 seconds before disconnecting the cable from the negative (-) auxiliary battery terminal. (for Audio and Visual System (for HV Model))
PROCEDURE
1. PRECAUTION
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2. REMOVE SERVICE PLUG GRIP
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3. DISCONNECT ENGINE WIRE
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4. REMOVE CONNECTOR COVER ASSEMBLY
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5. CHECK TERMINAL VOLTAGE
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6. INSTALL CONNECTOR COVER ASSEMBLY
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7. CONNECT ENGINE WIRE
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8. DISCONNECT REAR SEAT CENTER LAP TYPE BELT ASSEMBLY
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9. REMOVE REAR SEAT CUSHION ASSEMBLY
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10. REMOVE REAR SEAT CUSHION LOCK HOOK
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11. REMOVE REAR DOOR SCUFF PLATE LH
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12. REMOVE REAR UNDER SIDE COVER LH
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13. REMOVE REAR DOOR SCUFF PLATE RH
HINT:
Use the same procedure as for the LH side.
14. REMOVE REAR UNDER SIDE COVER RH
HINT:
Use the same procedure as for the LH side.
15. REMOVE REAR UNDER COVER
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16. REMOVE REAR SEAT CUSHION LEG SUB-ASSEMBLY
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17. REMOVE NO. 1 HV BATTERY COVER PANEL RH
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18. DISCONNECT HV FLOOR UNDER WIRE
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19. DISCONNECT FLOOR WIRE
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20. REMOVE NO. 4 HV BATTERY PROTECTOR
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21. REMOVE UPPER NO. 1 HYBRID BATTERY COVER SUB-ASSEMBLY
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22. REMOVE HV BATTERY JUNCTION BLOCK ASSEMBLY
CAUTION:
Be sure to wear insulated gloves and protective goggles.
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(a) Disengage the 2 claws and open the wiring harness protector. |
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(b) Disconnect the HV battery junction block assembly connector. NOTICE: Insulate the disconnected high-voltage connector with insulating tape. |
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(c) Disconnect the hybrid battery terminal block connector.
NOTICE:
Insulate the disconnected high-voltage connector with insulating tape.
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(d) Remove the bolt and electric vehicle battery plug assembly from the HV battery. |
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(e) Disconnect the 2 HV battery junction block assembly connectors. NOTICE: Insulate the disconnected high-voltage connectors with insulating tape. |
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(f) Using a screwdriver with its tip wrapped with protective tape, disengage the 2 claws and remove the wiring harness protector. |
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(g) Remove the 4 nuts and HV battery junction block assembly from the HV battery. NOTICE: If the HV battery junction block assembly has been struck or dropped, replace it with a new one. |
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