Removal [08/2020 - 08/2021]: 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.

CHECK FOR DTC

Check for DTCs.

for Nickel Metal Hydride Battery:
Refer to DTC CHECK / CLEAR [06/2018 - ]
for Lithium-ion Battery:
Refer to DTC CHECK / CLEAR [08/2020 - ]

WARNING:

Confirm that DTC P0AA6-49 (Hybrid / EV Battery Voltage System Isolation Internal Electronic Failure), P1C7C-49 (Hybrid / EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure), P1C7D-49 (Hybrid / EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure), P1C7E-49 (Hybrid / EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure) or P1C7F-49 (Hybrid / EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure) is not output before removing or installing the HV battery. If this DTC is output, perform troubleshooting for this DTC first.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

To reduce the risk of electric shock, do not perform troubleshooting before checking for DTCs.

DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL
Refer to PROCEDURE - Step 1
REMOVE BATTERY SERVICE HOLE COVER
See step 1

REMOVE SERVICE PLUG GRIP

WARNING:

Be sure to wear insulated gloves.

Do not inspect or service the high voltage system with the service plug grip installed.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

To reduce the risk of electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.

To reduce the risk of electric shock, make sure to wait at least 10 minutes after removing the service plug grip to fully discharge the high voltage capacitor inside the inverter with converter assembly.

Keep the removed service plug grip in your pocket to prevent other technicians from accidentally installing it while you are servicing the vehicle.

NOTE:

After removing the service plug grip, turning the power switch on (READY) may cause a malfunction. Do not turn the power switch on (READY) unless instructed by the repair information .
Do not touch the terminals of the service plug grip.
If the service plug grip has been struck or dropped, replace it.

HINT:

Waiting for at least 10 minutes is required to discharge the high voltage capacitor inside the inverter with converter assembly.

While wearing insulated gloves, rotate the handle of the service plug grip and remove the service plug grip as indicated by the arrows, in the order shown in the illustration.

Fig 1: Service Plug Grip Disconnecting Sequence [08/2020 - 08/2021]
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002