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Home >> Toyota >> 2020 >> Avalon Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 63 (Engine Mechanical (Service Information) [A25A-FXS] (2 Of 2)) >> Cylinder Block >> Disassembly [08/2021 - ] >> Caution/Notice/Hint

Disassembly [08/2021 - ]: Caution/Notice/Hint

WARNING: This page is about a different variant/trim than selected.

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 PROCEDURE 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
Intelligent clearance sonar system*
Lighting System (for HV Model with Cornering Light)
Memorize steering angle neutral point Parking assist monitor system Refer to INITIALIZATION [04/2018 - ]
Panoramic view monitor system Refer to INITIALIZATION [04/2018 - ]
Replacement of ECM Perform Vehicle Identification Number (VIN) registration MIL illuminates Refer to REGISTRATION [04/2018 - ]
  • Replacement of engine assembly
  • Gas leak from exhaust system is repaired
  • Replacement of throttle body with motor assembly
  • Cleaning the deposits from the throttle body assembly
  • Replacement of cam timing control motor with EDU assembly
  • Removal and installation of a cam timing control motor with EDU assembly
  • Replacement of camshaft timing gear assembly
  • Removal and installation of a camshaft timing gear 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 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
  • Replacement of knock control sensor
  • Replacement of piston or piston ring
  • Replacement of fuel pressure sensor (fuel delivery pipe with sensor assembly) (for low pressure side)
Inspection After Repair
  • Poor idle, etc.
  • Engine start function, etc.
Refer to INITIALIZATION [08/2021 - ]
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 [08/2020 - ]
Replacement of hybrid vehicle transaxle assembly
  • Resolver learning
  • Initialize resolver
Front wheel alignment adjustment
  1. Clear zero point calibration data.
  2. Perform yaw rate and acceleration sensor zero point calibration.
  • DTCs are stored
  • ABS warning light illuminates
  • Brake warning light/yellow (minor malfunction) illuminates
  • Slip indicator light illuminates
  • VSC disabled or malfunctions
Refer to CALIBRATION [08/2021 - ]
  • Suspension, tires, etc.*1
  • Replacement of front bumper assembly
  • Measurement of ultrasonic sensor detection angle
  • Ultrasonic sensor detection angle registration
  • Intelligent clearance sonar system
  • Intuitive parking assist system
Refer to CALIBRATION [04/2018 - ]
Suspension, tires, etc.*1 Rear television camera assembly optical axis (Back camera position setting) Parking assist monitor system Refer to INITIALIZATION [04/2018 - ] for Initialization
Refer to CALIBRATION [04/2018 - ] for Calibration
Replacement of front bumper assembly Front television camera view adjustment Panoramic view monitor system Refer to INITIALIZATION [04/2018 - ] for Initialization
Refer to CALIBRATION [04/2018 - ] for Calibration
Suspension, tires, etc.*1
  • Parking assist ECU initialization
  • Adjust steering angle
  • Television camera assembly optical axis adjustment (Back camera position setting)
  • Replacement of headlight ECU sub-assembly LH
  • Replacement of headlight assembly LH
Synchronize the vehicle information Lighting system (for HV Model with Cornering Light) Refer to INITIALIZATION [04/2018 - ]
  1. *: When performing learning using the Techstream.

    Refer to CALIBRATION [04/2018 - ]

  2. *1: If the vehicle height has changed due to suspension or tire replacement