Installation [08/2020 - ]: Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

INSTALL HV BATTERY JUNCTION BLOCK ASSEMBLY
WARNING:
Be sure to wear insulated gloves and protective goggles.
1. Install the HV battery junction block assembly to the HV battery with the 4 nuts.
  Torque: 7.5 N.m (76 kgf/cm, 66 in.lbf)
  
  NOTE:
  If the HV battery junction block assembly has been struck or dropped, replace it with a new one.
2. Engage the 2 claws to install the wiring harness protector.
3. Connect the 2 HV battery junction block assembly connectors.
  NOTE:
  Make sure that the connectors are connected securely.
4. Install the electric vehicle battery plug assembly to the HV battery with the bolt.
  Torque: 7.5 N.m (76 kgf/cm, 66 in.lbf)
5. Connect the hybrid battery terminal block connector.
  NOTE:
  Make sure that the connector is connected securely.
6. Connect the HV battery junction block assembly connector.
  NOTE:
  Make sure that the connector is connected securely.
7. Engage the 2 claws to close the wiring harness protector.
CONNECT FLOOR WIRE
Refer to PROCEDURE - Step 12
CONNECT FLOOR UNDER WIRE
WARNING:
Be sure to wear insulated gloves.
1. Connect the shield ground to the HV battery.
2. Connect the 2 HV battery junction block assembly connectors.
  NOTE:
  Make sure that the connectors are connected securely.
INSTALL NO. 1 HV BATTERY COVER PANEL RH
Refer to PROCEDURE - Step 14
INSTALL REAR SEAT CUSHION LEG SUB-ASSEMBLY
See step 4
INSTALL REAR UNDER COVER
See step 5
INSTALL REAR UNDER SIDE COVER LH
See step 6
INSTALL REAR DOOR SCUFF PLATE LH
Refer to PROCEDURE - Step 29
INSTALL REAR UNDER SIDE COVER RH
See step 8
INSTALL REAR DOOR SCUFF PLATE RH
HINT:

Use the same procedure as for the LH side.
INSTALL REAR SEAT CUSHION LOCK HOOK
Refer to PROCEDURE - Step 4 [08/2020 - 08/2021] , or refer to PROCEDURE - Step 4 [08/2021 - ]
INSTALL REAR SEAT CUSHION ASSEMBLY
Refer to PROCEDURE - Step 5 [08/2020 - 08/2021] , or refer to PROCEDURE - Step 5 [08/2021 - ]
INSTALL SERVICE PLUG GRIP
Refer to INSTALLATION [06/2018 - ]

PERFORM CURRENT SENSOR OFFSET LEARNING

HINT:

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

Connect the Techstream to the DLC3.
Turn the power switch on (READY).

Perform a road test.

NOTE:

Accelerate and decelerate gently. Avoid rapid acceleration and deceleration.

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

Powertrain > HV Battery > Data List

Tester Display
Hybrid/EV Battery Current

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

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

Powertrain > HV Battery > Data List

Tester Display
Hybrid Battery Current

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