Installation [11/2021 - ]: Procedure

WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 350h. 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.

NOTE:

If the HV battery junction block assembly has been struck or dropped, replace it with a new one.
Make sure that the connectors are connected securely.

Torque: 7.5 N*m (76 kgf*cm, 66 in.*lbf)

CONNECT FLOOR WIRE

Refer to PROCEDURE - Step 5
CONNECT FLOOR UNDER WIRE

Refer to PROCEDURE - Step 9
INSTALL NO. 1 HV BATTERY COVER PANEL RH

Refer to PROCEDURE - Step 10
INSTALL REAR SEAT CUSHION LEG SUB-ASSEMBLY

See step 4
INSTALL BATTERY SERVICE COVER BOARD
See step 5
INSTALL NO. 3 BATTERY SERVICE COVER BOARD
See step 6
INSTALL REAR DOOR SCUFF PLATE LH
INSTALL NO. 2 BATTERY SERVICE COVER BOARD
INSTALL REAR DOOR SCUFF PLATE RH
INSTALL REAR SEAT CUSHION LOCK HOOK
INSTALL REAR SEAT CUSHION ASSEMBLY

Refer to PROCEDURE - Step 2
INSTALL SERVICE PLUG GRIP
See step 1

PERFORM CURRENT SENSOR OFFSET LEARNING

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

Perform a road test.

NOTE:

Accelerate and decelerate gently. Avoid rapid acceleration and deceleration.

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

Powertrain > HV Battery > Data List

Tester Display
Hybrid Battery Current

HINT:

Distance and driving time are not specified.

Turn the ignition switch off and leave the vehicle for 30 seconds or more.

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

Powertrain > HV Battery > Data List

Tester Display
Hybrid Battery Current

NOTE:

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

HINT:

When the ignition switch to 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.