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Caution / Notice / Hint

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.

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during engine unit 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 - ]
  • Replacement of throttle body with motor assembly
  • Cleaning the deposits from the throttle body with motor assembly
  • Replacement of cam timing control motor with EDU assembly*1
  • Replacement of camshaft timing gear assembly*1
  • Replacement of engine assembly
  • Replacement of cylinder head sub-assembly
  • Replacement of camshaft (for intake or exhaust camshaft)
  • Replacement of camshaft timing exhaust gear assembly
  • Replacement of port fuel injector assembly
  • Replacement of direct fuel injector assembly
  • Replacement of fuel (engine room side) pump assembly (for high pressure side)
  • Replacement of engine coolant temperature sensor
  • Replacement of spark plug
  • Replacement of ignition coil assembly
  • Replacement of EGR valve assembly
  • Gas leak from exhaust system is repaired
  • Replacement of knock control sensor
 Inspection after repair
  • Poor idle, etc.
  • Engine start function, etc.
 Refer to INITIALIZATION [11/2021 - ]
Replacement of inverter with converter assembly Resolver learning
  • DTCs are stored
  • Slight vibration at a vehicle speed of 5 km/h (3 mph) or less
  • Shock or vibration during acceleration
 Refer to UTILITY [11/2021 - ]
Replacement of hybrid vehicle transaxle assembly
  • Resolver learning
  • Initialize resolver
Tires
  • Initialization*2*3
  • Tire Position Identification*2*3
 Tire Pressure Warning System Refer to Procedures Necessary When Replacing Parts (for Tire Pressure Warning System) table below
Refer to WORK PROCEDURE [11/2021 - 03/2023]
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 [11/2021 - 03/2024]
Advanced Park Refer to CALIBRATION [11/2021 - 03/2024]
Wheel alignment adjustment Perform "Calibration"
  • DTCs are stored
  • ABS warning light illuminates
  • Brake system warning light (yellow indicator) illuminates
  • Slip indicator light illuminates
  • Electronically controlled brake system does not operate correctly
 Refer to RESET MEMORY / CALIBRATION [11/2021 - ]
Steering intermediate shaft assembly*4 Automatic rack centering - Refer to AUTOMATIC RACK CENTERING [11/2021 - ]
Replacement of front bumper assembly*1 Front television camera view adjustment Panoramic View Monitor System Refer to CALIBRATION [11/2021 - 03/2024]
Advanced Park Refer to CALIBRATION [11/2021 - 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 [11/2021 - 03/2024]
Advanced Park Refer to CALIBRATION [11/2021 - 03/2024]
Perform headlight ECU sub-assembly LH initialization Lighting System (w/ Automatic Headlight Beam Level Control System) Refer to INITIALIZATION [11/2021 - 03/2022]

*1: Even when not replacing the part, it is necessary to perform the specified necessary procedures after installation.

*2: Also necessary after performing a tire rotation.

*3: It is not necessary to perform this procedure if the tire pressure warning valve and transmitters are installed to the same location.

*4: If matchmarks were not placed when removing parts related to steering operation, perform automatic rack centering.

NOTE:
  • This procedure includes the removal of small-head bolts. Refer to Small-Head Bolts of Basic Repair Hint to identify the small-head bolts.

    Refer to PRECAUTION [11/2021 - ]

  • 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 (-) auxiliary battery terminal.

    Refer to INSPECTION MODE PROCEDURE [11/2021 - ]

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 35 km/h (22 mph) or more for 5 seconds or more. Refer to INITIALIZATION [11/2021 - ]
Front Camera System
Adaptive High Beam System
LEARNING COMPLETES WHEN VEHICLE IS OPERATED NORMALLY

Effect/Inoperative Function when Necessary Procedure not Performed Necessary Procedure Link
E-latch System
  • Back door opener
 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) 

Fig 1: Engine Unit Removal Components [11/2021 - 03/2022] (1 Of 4)
GTY1131035Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Callout - Procedure Part Name Code
1 DRIVE SHAFT BEARING BRACKET 43457 - - -
2 COMPRESSOR WITH MOTOR ASSEMBLY 88370 See step  2 - -
3 NO. 2 WATER BY-PASS PIPE SUB-ASSEMBLY 16207 - - -
4 FLOW SHUTTING VALVE (WATER BY-PASS HOSE ASSEMBLY) 16260 - - -
5 NO. 1 EXHAUST MANIFOLD HEAT INSULATOR 17167 See step  5 - -
6 MANIFOLD STAY 17118 See step  6 - -
7 EXHAUST MANIFOLD (TWC: Front Catalyst) 17141 See step  7 - -
8 EXHAUST MANIFOLD TO HEAD GASKET 17173 - - -
*1 STUD BOLT *2 WATER HOSE CLAMP BRACKET
• Non-reusable part - -
Fig 2: Engine Unit Removal Components [11/2021 - 03/2022] (2 Of 4)
GTY1074884Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Callout - Procedure Part Name Code
9 NO. 5 WATER BY-PASS HOSE 16282 - - -
10 THROTTLE BODY WITH MOTOR ASSEMBLY 22030 See step  10 - -
11 NO. 6 WATER BY-PASS HOSE 16283 See step  11 - -
12 THROTTLE BODY GASKET 22271 - - -
13 NO. 3 WATER BY-PASS HOSE 16267 - - -
14 NO. 4 WATER BY-PASS HOSE 16281 - - -
15 EGR COOLER ASSEMBLY 25680 - - -
16 EGR VALVE GASKET 25627 - - -
17 NO. 1 EGR COOLER GASKET 25685 - - -
18 NO. 1 EGR PIPE SUB-ASSEMBLY 25601 See step  18 - -
19 EGR VALVE ADAPTER GASKET 25629 - - -
20 EGR INLET GASKET 25628 - - -
21 NO. 4 WATER BY-PASS HOSE 16281 - - -
22 NO. 8 WATER BY-PASS HOSE 16296 - - -
23 EGR VALVE ASSEMBLY 25620 See step  23 - -
24 NO. 3 WATER BY-PASS PIPE 16279 See step  24 - -
25 NO. 2 WATER BY-PASS PIPE 16278 See step  25 - -
26 INTAKE MANIFOLD 17111 See step  26 - -
27 NO. 1 INTAKE MANIFOLD TO HEAD GASKET 17177 - - -
28 FUEL PIPE CLAMP 23841K - - -
29 FUEL TUBE SUB-ASSEMBLY 23910A See step  29 - -
30 NO. 1 FUEL PIPE SUB-ASSEMBLY 23801P See step  30 - -
31 FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY 23100X See step  31 - -
32 FUEL PUMP SPACER GASKET 23224D - - -
33 FUEL PUMP LIFTER ASSEMBLY 23470 - - -
*A w/ Stud Bolt *B w/o Stud Bolt
*C for Type A *D for Type B
*1 FUEL PUMP FLANGE - -
• Non-reusable part - -
Fig 3: Engine Unit Removal Components [11/2021 - 03/2022] (3 Of 4)
GTY1075969Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Callout - Procedure Part Name Code
34 NO. 7 WATER BY-PASS HOSE 16295 - - -
35 SENSOR WIRE 82219A See step  35 - -
36 NO. 6 ENGINE WIRE 82126A - - -
37 WIRE HARNESS CLAMP BRACKET - See step  37 - -
38 FUEL DELIVERY PIPE SUB-ASSEMBLY 23807 See step  38 - -
39 NO. 1 DELIVERY PIPE SPACER 23807V - - -
40 INJECTOR VIBRATION INSULATOR 23291 - - -
41 NO. 5 ENGINE WIRE 82125N - - -
42 PORT FUEL INJECTOR ASSEMBLY 23250F See step  42 - -
43 FUEL DELIVERY PIPE 23814B See step  43 - -
44 DIRECT FUEL INJECTOR ASSEMBLY 23250E See step  44 - -
45 NOZZLE HOLDER CLAMP 23695A - - -
46 NO. 3 FUEL INJECTOR BACK-UP RING 23258 See step  46 - -
47 NO. 1 FUEL INJECTOR BACK-UP RING 23256 - - -
48 C-RING - - - -
49 INJECTOR VIBRATION INSULATOR 23291A - - -
50 FUEL INJECTOR SEAL 23255A See step  50 - -
• Non-reusable part - -
Fig 4: Engine Unit Removal Components [11/2021 - 03/2022] (4 Of 4)
GTY1075956Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Callout - Procedure Part Name Code
51 IGNITION COIL ASSEMBLY 19500 See step  51 - -
52 ENGINE OIL LEVEL DIPSTICK GUIDE 11452 See step  52 - -
53 NO. 3 EXHAUST MANIFOLD HEAT INSULATOR 17169A - - -
*1 ENGINE OIL LEVEL DIPSTICK - -
• Non-reusable part - -
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