LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2025 >> NX 350h >> Repair and Diagnosis >> External Pages >> Different car >> Section 39 (Engine Control System - Service Information) >> Engine Coolant Temperature Sensor >> Removal [11/2021 - ] >> Caution / Notice / Hint

Caution / Notice / Hint

WARNING: This page is about a different car, the 2025 Lexus NX 350, 2024 Lexus NX 350, 2023 Lexus NX 350, and 2022 Lexus NX 350. 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 coolant temperature sensor 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 engine coolant temperature sensor (for Water Inlet Housing Side)
  • Replacement of engine coolant temperature sensor (for Cylinder Head Side)
  • Replacement of Engine coolant temperature sensor (for Outlet Side)
Inspection after repair
  • Poor idle, etc.
  • Engine start function, etc.
Refer to INITIALIZATION [11/2021 - ]
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.

Refer to INSPECTION MODE PROCEDURE [11/2021 - ]

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
  • 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 Coolant Temperature Sensor Removal Components
GTY1077593Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Callout - Procedure Part Name Code
1 DRAIN ENGINE COOLANT - - See step  1 -
2 ENGINE COOLANT TEMPERATURE SENSOR (for Outlet Side) 89422A See step  2 - -
3 GENERATOR ASSEMBLY 27060 - - -
4 WIRE HARNESS - - - -
5 NO. 2 INTERCOOLER COOLING WATER PIPE 16516A - - -
6 NO. 1 INTERCOOLER COOLING WATER PIPE 16515A - - -
7 ENGINE COOLANT TEMPERATURE SENSOR (for Water Inlet Housing Side) 89422 See step  7 - -
8 INTAKE MANIFOLD WITH INTERCOOLER ASSEMBLY - - - -
9 ENGINE COOLANT TEMPERATURE SENSOR (for Cylinder Head Side) 89422 See step  9 - -
Non-reusable part - -