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Home >> Lexus >> 2021 >> ES 300h Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (A25A-FXS) - Service Information >> Engine Coolant Temperature Sensor >> Removal [09/2022 - ] >> Caution / Notice / Hint

Caution / Notice / Hint

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
Auxiliary battery terminal is disconnected/reconnected Perform steering sensor zero point calibration Lane Tracing Assist System Refer to INITIALIZATION [08/2021 - ]
Pre-collision System
Parking Support Brake System*
Lighting System (for HV Model)
Initialize power trunk lid system Power Trunk Lid System (for HV Model) Refer to INITIALIZATION [06/2018 - ]
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 [06/2018 - ] for Nickel Metal Hydride Battery
Refer to UTILITY [08/2020 - ] for Lithium-ion Battery
Replacement of ECM Perform Vehicle Identification Number (VIN) registration MIL illuminates Refer to REGISTRATION [06/2018 - ]
Replacement of engine coolant temperature sensor Inspection after repair
  • Poor idle, etc.
  • Engine start function, etc.
Refer to INITIALIZATION [08/2021 - ]

*: When performing learning using the Techstream.

NOTE:
  • After the ignition switch is turned off, the audio and visual system records various types of memory and settings. As a result, after turning the ignition switch off, make sure to wait at least 2 minutes before disconnecting the cable from the negative (-) auxiliary battery terminal.
  • When the cable is disconnected from the negative (-) auxiliary battery terminal and the security lock setting has been enabled, multi-display operations will be disabled upon next startup unless the password is entered. Be sure to check the security lock setting before disconnecting the cable from the negative (-) auxiliary battery terminal.