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 ECM 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 | Perform Vehicle Identification Number (VIN) registration | DTC is output | Refer to REGISTRATION [11/2021 - ] |
| Update ECU security key | Vehicle Control History (RoB) are stored | Refer to UPDATE ECU SECURITY KEY [11/2021 - ] | |
| Code registration | Engine start function | Refer to REGISTRATION [11/2021 - ] | |
| Replacement of ECM (If transaxle compensation code read from ECM) |
|
|
Refer to INITIALIZATION [11/2021 - ]
for UB80E, UB80F Initialization Refer to REGISTRATION [11/2021 - ] for UB80E, UB80F Registration |
| Replacement of ECM (If transaxle compensation code not read from ECM) |
|
*1: Not necessary when ECM replaced with new one
NOTE:
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 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 [11/2021 - 03/2023] , or refer to PRECAUTION [03/2023 - 03/2024] , or 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. | - |
COMPONENTS (REMOVAL)
| Callout - Procedure | Part Name Code | ||||
|---|---|---|---|---|---|
| 1 | PRECAUTION | - | See step 1 | - | - |
| 2 | NEGATIVE BATTERY TERMINAL | - | - | - | - |
| 3 | NO. 1 ENGINE COVER SUB-ASSEMBLY | 12601B | See step 3 | - | - |
| 4 | RADIATOR UPPER AIR GUIDE PLATE | 16681A | - | - | - |
| 5 | INLET AIR CLEANER ASSEMBLY | 17750A | - | - | - |
| 6 | VACUUM HOSE | - | - | - | - |
| 7 | NO. 2 VENTILATION HOSE | 12262 | - | - | - |
| 8 | AIR CLEANER ASSEMBLY WITH AIR CLEANER HOSE | - | - | - | - |
| 9 | ECM | 89661 | See step 9 | - | - |
| 10 | NO. 1 ECM BRACKET | 89667E | - | - | - |
| 11 | NO. 2 ECM BRACKET | 89668 | - | - | - |