Caution / Notice / Hint
WARNING: This page is about a different car, the 2025 Lexus NX 250, 2024 Lexus NX 250, 2023 Lexus NX 250, and 2022 Lexus NX 250. However, it is still accessible from the selected car via links, so may be relevant.
The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during rear engine mounting insulator removal/installation are shown below.
NECESSARY PROCEDURES AFTER PARTS REMOVED/INSTALLED/REPLACED
| Replaced Part or Performed Procedure | Necessary Procedure | Effect/Inoperative Function when Necessary Procedure not Performed | Link |
|---|---|---|---|
| Replacement of ECM | Update ECU security key | Vehicle Control History (RoB) are stored | Refer to UPDATE ECU SECURITY KEY [11/2021 - ] |
| Perform Vehicle Identification Number (VIN) registration | DTC is output | Refer to REGISTRATION [11/2021 - ] | |
| Code registration | Engine start function | Refer to REGISTRATION [11/2021 - ] | |
| Gas leak from exhaust system is repaired | Inspection after repair |
|
Refer to REGISTRATION [11/2021 - ] |
| Replacement of battery | Integrated current value initialization | Stop and Start System | Refer to REGISTRATION [11/2021 - ] |
| Replacement of ECM (If transaxle compensation code read from ECM) |
|
|
for UB80E, UB80F Initialization: Refer to INITIALIZATION [11/2021 - ] for UB80E, UB80F Registration: Refer to REGISTRATION [11/2021 - ] |
| Replacement of ECM (If transaxle compensation code not read from ECM) |
|
||
| Replacement of automatic transaxle fluid | ATF thermal degradation estimate reset | The value of the Data List item "ATF Thermal Degradation Estimate" is not estimated correctly | Refer to INITIALIZATION [11/2021 - ] |
| Tires |
|
Tire Pressure Warning System | Refer to Procedures Necessary When Replacing Parts (for Tire Pressure Warning System) table below Refer to WORK PROCEDURE [03/2024 - ] |
| Rear television camera assembly optical axis (Back camera position setting) | Parking Assist Monitor System | Refer to CALIBRATION [11/2021 - ] | |
| Parking assist ECU initialization | Panoramic View Monitor System | Refer to CALIBRATION [03/2024 - ] | |
| Advanced Park | Refer to CALIBRATION [03/2024 - ] | ||
| ECU Data Initialization (When performing tire replacement after RoB code X2104 is output) | Dynamic Torque Control AWD System | Refer to CALIBRATION [03/2023 - ] | |
| Wheel alignment adjustment |
|
|
Refer to RESET MEMORY / CALIBRATION [11/2021 - ] |
| Steering intermediate shaft assembly*3 | Automatic rack centering | - | Refer to POWER STEERING ECU INITIAL SETTING [11/2021 - ] |
| Replacement of front bumper assembly*2 | Front television camera view adjustment | Panoramic View Monitor System | Refer to CALIBRATION [03/2024 - ] |
| Advanced Park | Refer to CALIBRATION [03/2024 - ] | ||
| Suspension parts | Rear television camera assembly optical axis (Back camera position setting) | Parking Assist Monitor System | Refer to CALIBRATION [11/2021 - ] |
| Parking assist ECU initialization | Panoramic View Monitor System | Refer to CALIBRATION [03/2024 - ] | |
| Advanced Park | Refer to CALIBRATION [03/2024 - ] | ||
| Perform headlight ECU sub-assembly LH initialization | Lighting System (w/ Automatic Headlight Beam Level Control System) | Refer to INITIALIZATION [03/2022 - ] |
*1: Not necessary when ECM replaced with new one
*2: Even when not replacing the part, it is necessary to perform the specified necessary procedures after installation.
*3: If matchmarks were not placed when removing parts related to steering operation, perform automatic rack centering.
*4: Also necessary after performing a tire rotation.
*5: It is not necessary to perform this procedure if the tire pressure warning valve and transmitters are installed to the same location.
NOTE:
- When disconnecting a wire harness of any component connected to the supply power of the integrated capacitor (integration control supply) or when removing the integrated capacitor (integration control supply), make sure to wait 5 minutes or more after turning the ignition switch off for self-diagnosis to complete and the voltage of the integrated capacitor (integration control supply) to discharge.
- To prevent the key from being locked in the vehicle, make sure to enter e-latch inspection mode and enable the manual release handle before disconnecting the cable from the negative (-) battery terminal.
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
| Effect/Inoperative Function when Necessary Procedure not Performed | Necessary Procedure | Link |
|---|---|---|
| Lighting System (EXT) | Drive the vehicle straight ahead at 15 km/h (10 mph) or more for 1 second or more. | Refer to INITIALIZATION [11/2021 - ] |
| Front Camera System | ||
| Adaptive High Beam System | ||
| Stop and Start System | Idle the engine for approximately 5 to 60 minutes or drive the vehicle until stop and start control is permitted. | Refer to PRECAUTION [03/2024 - ] |
LEARNING COMPLETES WHEN VEHICLE IS OPERATED NORMALLY
| Effect/Inoperative Function when Necessary Procedure not Performed | Necessary Procedure | Link |
|---|---|---|
E-latch System
|
Perform door unlock operation with door control switch or electrical key transmitter sub-assembly switch. | Refer to INITIALIZATION [11/2021 - ] |
| Power Back Door System | Reset back door close position | Refer to INITIALIZATION [11/2021 - ] |
| Air Conditioning System | After the ignition switch is turned to ON, the servo motor standard position is recognized. | - |