| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM10000000277VJ |
| Model Year Start: 2023 | Model: Corolla | Prod Date Range: [09/2022 - ] |
| Title: HYBRID / BATTERY CONTROL: HV RELAY ASSEMBLY (for LITHIUM-ION BATTERY): REMOVAL; 2023 - 2025 MY Corolla Corolla HV [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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HV battery junction block assembly |
Current sensor offset learning |
DTCs are stored |
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High voltage fuse accumulated load history reset |
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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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![2023 - 2025 MY Corolla HV [09/2022 - ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): 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:
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After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal.
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- After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
HINT:
When the cable is disconnected / reconnected to the auxiliary battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.
Learning completes when vehicle is driven
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Effect/Inoperative Function when Necessary Procedure not Performed |
Necessary Procedure |
Link |
|---|---|---|
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Front Camera System (for TMC Made) |
Drive the vehicle straight ahead at 15 km/h (9 mph) or more for 1 second or more. |
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PROCEDURE
1. PRECAUTION
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2. REMOVE SERVICE PLUG GRIP
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3. REMOVE CONNECTOR COVER ASSEMBLY
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4. CHECK TERMINAL VOLTAGE
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5. INSTALL CONNECTOR COVER ASSEMBLY
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6. DISCONNECT REAR SEAT CENTER LAP TYPE BELT ASSEMBLY
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7. REMOVE REAR SEAT CUSHION ASSEMBLY
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8. REMOVE REAR SEAT CUSHION LOCK HOOK
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9. REMOVE REAR DOOR SCUFF PLATE LH
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10. REMOVE REAR UNDER SIDE COVER LH
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11. REMOVE REAR DOOR SCUFF PLATE RH
HINT:
Use the same procedure as for the LH side.
12. REMOVE REAR UNDER SIDE COVER RH
HINT:
Use the same procedure as for the LH side.
13. REMOVE REAR UNDER COVER
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14. REMOVE REAR SEAT CUSHION LEG SUB-ASSEMBLY
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15. REMOVE NO. 1 HV BATTERY COVER PANEL RH
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16. DISCONNECT FLOOR UNDER WIRE
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17. DISCONNECT FLOOR WIRE
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(a) Disconnect the electric vehicle battery plug assembly connector. |
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(b) Disconnect the 2 HV battery junction block assembly connectors.
(c) Disengage the clamp.
18. REMOVE HV BATTERY JUNCTION BLOCK ASSEMBLY
CAUTION:
Be sure to wear insulated gloves and protective goggles.
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(a) Remove the bolt. |
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(b) Disconnect the 2 HV battery junction block assembly connectors.
NOTICE:
Insulate the disconnected high-voltage connectors with insulating tape.
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(c) Remove the 3 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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