Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM10000000277W0
Model Year Start: 2023 Model: Corolla Prod Date Range: [09/2022 -           ]
Title: HYBRID / BATTERY CONTROL: HV RELAY ASSEMBLY (for LITHIUM-ION BATTERY): INSTALLATION; 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]

INSTALLATION

PROCEDURE

1. INSTALL HV BATTERY JUNCTION BLOCK ASSEMBLY

CAUTION:

Be sure to wear insulated gloves and protective goggles.

(a) Install the HV battery junction block assembly to the HV battery with the 3 nuts.

Torque:

7.5 N·m {76 kgf·cm, 66 in·lbf}

NOTICE:

If the HV battery junction block assembly has been struck or dropped, replace it with a new one.

(b) Connect the 2 HV battery junction block assembly connectors.

NOTICE:

Make sure that the connectors are connected securely.

(c) Install the bolt.

Torque:

7.5 N·m {76 kgf·cm, 66 in·lbf}

2. CONNECT FLOOR WIRE

(a) Engage the clamp.

(b) Connect the 2 HV battery junction block assembly connectors.

(c) Connect the electric vehicle battery plug assembly connector.

3. CONNECT FLOOR UNDER WIRE

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HV BATTERY (for LITHIUM-ION BATTERY): INSTALLATION+

4. INSTALL NO. 1 HV BATTERY COVER PANEL RH

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HV BATTERY (for LITHIUM-ION BATTERY): INSTALLATION+

5. INSTALL REAR SEAT CUSHION LEG SUB-ASSEMBLY

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: BATTERY BLOWER: INSTALLATION+

6. INSTALL REAR UNDER COVER

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: BATTERY BLOWER: INSTALLATION+

7. INSTALL REAR UNDER SIDE COVER LH

Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; INTERIOR PANELS / TRIM: ROOF HEADLINING (for Sedan): INSTALLATION+ 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; INTERIOR PANELS / TRIM: ROOF HEADLINING (for Sedan): INSTALLATION+

8. INSTALL REAR DOOR SCUFF PLATE LH

Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; INTERIOR PANELS / TRIM: ROOF HEADLINING (for Sedan): INSTALLATION+ 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; INTERIOR PANELS / TRIM: ROOF HEADLINING (for Sedan): INSTALLATION+

9. INSTALL REAR UNDER SIDE COVER RH

HINT:

Use the same procedure as for the LH side.

10. INSTALL REAR DOOR SCUFF PLATE RH

HINT:

Use the same procedure as for the LH side.

11. INSTALL REAR SEAT CUSHION LOCK HOOK

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; SEAT: REAR SEAT ASSEMBLY: INSTALLATION+

12. INSTALL REAR SEAT CUSHION ASSEMBLY

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; SEAT: REAR SEAT ASSEMBLY: INSTALLATION+

13. CONNECT REAR SEAT CENTER LAP TYPE BELT ASSEMBLY

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; SEAT: REAR SEAT ASSEMBLY: INSTALLATION+

14. INSTALL SERVICE PLUG GRIP

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: SERVICE PLUG GRIP: INSTALLATION

15. PERFORM CURRENT SENSOR OFFSET LEARNING

HINT:

Perform this procedure when the HV battery junction block assembly or battery ECU assembly has been replaced.

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (READY).

(c) Perform a road test.

NOTICE:

Accelerate and decelerate gently. Avoid rapid acceleration and deceleration.

(1) Enter the following menus: Powertrain / HV Battery / Data List / Hybrid Battery Current.

Powertrain > HV Battery > Data List

Tester Display

Hybrid/EV Battery Current

(2) Drive the vehicle with the value of Data List item "Hybrid Battery Current" between -50 A and 50 A.

HINT:

Distance and driving time are not specified.

(3) Turn the power switch off and leave the vehicle for 30 seconds or more.

(4) Turn the power switch on (IG).

(5) Enter the following menus: Powertrain / HV Battery / Data List / Hybrid Battery Current.

Powertrain > HV Battery > Data List

Tester Display

Hybrid/EV Battery Current

(6) Check that the value of "Hybrid Battery Current" is between -0.5 A and 0.5 A with the power switch on (IG).

NOTICE:

If the value is outside the specified range, perform the road test again.

HINT:

  • When the power switch is on (IG), if value of "Hybrid Battery Current" is between -0.5 A and 0.5 A, current sensor offset learning has been completed.
  • Even if the current sensor offset learning is not complete, the current sensor value will be corrected by repeating the road test a maximum of 7 times.