FRONT DIFFERENTIAL CARRIER ASSEMBLY REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during the front differential carrier assembly removal/installation are shown below.

Necessary Procedure After Parts Removed/Installed/Replaced
Replacement Part or Procedure	Necessary Procedure	Effect/Inoperative when not Performed	Link
Disconnect cable from negative battery terminal	Drive the vehicle until stop and start control is permitted (approximately 5 to 60 minutes)	Stop and start system	Click here
	Memorize steering angle neutral point	LKA/LDA system	Click here
		Parking support brake system*1
		Pre-collision system
		Adaptive high beam system
		Lighting system (EXT) Cornering lights
		Variable gear ratio steering system	Click here
		Parking assist monitor system	Click here
		Panoramic view monitor system	Click here
	Initialize rear door sunshade system	Rear door sunshade system	Click here
	Initialize power trunk lid system	Power trunk lid system	Click here
Air fuel ratio sensor (sensor 1) Air fuel ratio sensor (sensor 2)	Inspection after repair	Poor idle, etc. Engine start function, etc.	w/ Canister Pump Module: Click here w/o Canister Pump Module: Click here
Engine assembly	Inspection after repair	Poor idle, etc. Engine start function, etc.	w/ Canister Pump Module: Click here w/o Canister Pump Module: Click here
Engine assembly	Reset memory Perform road test to allow ECM to learn	Large shift shock Engine overruns	Click here
w/ Stop and Start System: Starter assembly Note When the starter assembly is replaced, "ST NO. 1 relay" and "ST NO. 2 relay" must be also replaced.	Clear number of starter operations	Stop and start system	Click here
Automatic transmission assembly with transfer	Set transmission compensation code (step 1)*2 Perform road test to allow ECM to learn	Large shift shock Engine overruns	for Initialization: Click here for Registration: Click here
Automatic transmission fluid	ATF thermal degradation estimate reset	The value of the Data List item "ATF Thermal Degradation Estimate" is not estimated correctly.	Click here
Parts between the steering wheel and tires have been removed/installed, replaced or adjusted	Perform actuator angle neutral point calibration and initialization	Variable gear ratio steering system Steering wheel off-center DTCs are output	Click here
Front bumper assembly (Including removal and installation)	Ultrasonic sensor detection angle Ultrasonic sensor detection angle registration	Parking support brake system	Click here
Front bumper assembly (Including removal and installation)	Front television camera view adjustment	Panoramic view monitor system	Click here
Suspension, tires, etc.	Ultrasonic sensor detection angle Ultrasonic sensor detection angle registration	Parking support brake system	Click here
	Parking assist ECU initialization Adjust steering angle Rear television camera view adjustment (for Rear camera detection system)	Panoramic view monitor system	Click here
	Rear television camera assembly optical axis (Back camera position setting)	Parking assist monitor system	Click here

*1: When performing learning using the GTS.
Click here Click here
*2: New automatic transmission's compensation code.

Note

After the engine switch is turned off, the radio receiver assembly records various types of memory and settings. As a result, after turning the engine switch off, be sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) battery terminal.

Waiting Time before Disconnecting Cable from Negative (-) Battery Terminal
System Name	See Procedure
Vehicle enrolled in lexus enform system or safety connect system	6 minutes
Vehicle not enrolled in lexus enform system and safety connect system	1 minute

CAUTION:

*a Heavy object exceeding the capacity of the engine lifter

Because the weight of the engine with transmission assembly is extremely heavy, make sure to follow the work procedures described in the repair manual.
If work is not performed according to the procedures described in the repair manual, there is a danger that the engine lifter could drop and components could fall down.

*a High temperature areas

Do not touch the engine or exhaust manifold sub-assembly when they are hot.
Touching the engine or exhaust manifold sub-assembly when they are hot could result in burns.

Never perform work on fuel system components near any possible ignition sources.
Vaporized fuel could ignite, resulting in a serious accident.

Do not perform work on fuel system components without first disconnecting the cable from the negative (-) battery terminal.
Sparks could cause vaporized fuel to ignite, resulting in a serious accident.

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.

Click here

PROCEDURE

DRAIN DIFFERENTIAL OIL

Click here
REMOVE ENGINE AND TRANSMISSION

Click here
REMOVE PROPELLER SHAFT HEAT INSULATOR
1. Remove the 2 bolts and propeller shaft heat insulator.
REMOVE FRONT DIFFERENTIAL CARRIER ASSEMBLY
1. Support the front differential carrier assembly with a jack.
  
  CAUTION:
  
  As the front differential carrier assembly is very heavy, securely support it with the jack.
2. Remove the 5 bolts and front differential carrier assembly.
  Note
  
  Do not damage the installation surface when removing the front differential carrier assembly.
  
  The remaining oil may leak out when removing the front differential carrier assembly.