Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Removal

Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual / Drivetrain / U881e (automatic Transmission / Transaxle) / Automatic Transaxle Assembly / Removal

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 automatic transaxle assembly removal/installation are shown below.

Necessary Procedure After Parts Removed/Installed/Replaced

Replacement Part or Performed Procedure

Necessary Procedure

Effect/Inoperative Function when Necessary Procedure not Performed

Link
*1: When performing learning using the Techstream.

Click here

Battery terminal is disconnected/reconnected

Memorize steering angle neutral point

Lane Control System

Pre-collision System

Intelligent Clearance Sonar System*1

Lighting System (w/ Automatic Headlight Beam Level Control System)

Parking Assist Monitor System

Panoramic View Monitor System

Initialize back door lock

Power Door Lock Control System

Reset back door close position

Power Back Door System (w/ Outside Door Control Switch)

Replacement of automatic transaxle assembly

Perform the following procedures in the order shown:

  1. Input transaxle compensation code into ECM
  2. Perform road test to allow ECM to learn
  • Large shift shock
  • Deterioration of fuel efficiency

for Initialization:

for Registration:

Replacement of ECM

(If possible, read the transaxle compensation code from the previous ECM)

Perform the following procedures in the order shown:

  1. Transfer transaxle compensation code
  2. Perform road test to allow ECM to learn

Replacement of ECM

(If impossible, read the transaxle compensation code from the previous ECM)

Perform the following procedures in the order shown:

  1. Reset transaxle compensation code
  2. Perform road test to allow ECM to learn

Front wheel alignment adjustment

Calibration
  • VSC disabled or malfunctions
  • DTCs are stored
  • Slip indicator light illuminates
  • ABS warning light illuminates

Suspension, tires, etc.

(The vehicle height changes because of suspension or tire replacement)
  • Ultrasonic sensor detection angle
  • Ultrasonic sensor detection angle registration
  • Intelligent Clearance Sonar System
  • Intuitive Parking Assist System (w/ Intelligent Clearance Sonar System)

Rear television camera assembly optical axis (Back camera position setting)

Parking Assist Monitor System

for Initialization:

for Calibration:
  • Parking assist ECU initialization
  • Adjust steering angle

Panoramic View Monitor System

for Initialization:

for Calibration:

Initialize No. 1 headlight ECU sub-assembly LH

Lighting System (w/ Automatic Headlight Beam Level Control System)

Replacement of throttle body with motor assembly

Inspection After Repair
  • Poor idle, etc.
  • Engine start function, etc.

Cleaning the deposits from the throttle body with motor assembly

Air leaks from intake system is repaired

Gas leak from exhaust system is repaired

Replacement of ECM

Vehicle Identification Number (VIN) registration

MIL comes on

ECU communication ID registration (Immobiliser system)

Engine start function

Perform code registration (Immobiliser system)
  • Wireless door lock control system
  • Smart access system with push-button start
  • Engine start function
  • Steering lock system
  • Telematics system

CAUTION:

The automatic transaxle assembly is very heavy. Be sure to follow the procedure described in the repair manual, or the transmission jack may suddenly drop.

*a

Object Exceeding Weight Limit of Transmission Jack

NOTICE:

If automatic transaxle parts are replaced, refer to Parts Replacement Compensation Table to determine if any additional operations are necessary.

Click here

PROCEDURE

1. PRECAUTION

NOTICE:

After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

Click here

2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

NOTICE:

When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

Click here

3. REMOVE V-BANK COVER SUB-ASSEMBLY

Click here

4. REMOVE FRONT WIPER MOTOR AND LINK ASSEMBLY

Click here

5. REMOVE OUTER COWL TOP PANEL SUB-ASSEMBLY

Click here

6. REMOVE STARTER ASSEMBLY

Click here

7. REMOVE ECM

Click here

8. REMOVE BATTERY

Click here

9. REMOVE BATTERY CARRIER SUB-ASSEMBLY

(a) Disengage the 2 clamps.

(b) Remove the 6 bolts and battery carrier sub-assembly from the vehicle body.

10. REMOVE BATTERY BRACKET REINFORCEMENT

(a) Remove the 2 bolts and battery bracket reinforcement from the vehicle body.

11. DISCONNECT TRANSMISSION CONTROL CABLE ASSEMBLY

Click here

12. REMOVE NO. 2 VACUUM SWITCHING VALVE ASSEMBLY

Click here

13. DISCONNECT WIRE HARNESS

(a) Disconnect the transmission wire connector and park/neutral position switch assembly connector.

*a

Transmission Wire Connector

*b

Park/Neutral Position Switch Assembly Connector

(b) Remove the bolt and disconnect the wire harness from the automatic transaxle case sub-assembly.

14. REMOVE FRONT STABILIZER BAR

Click here

15. REMOVE FRONT WHEEL OPENING EXTENSION PAD LH

Click here

16. REMOVE NO. 3 ENGINE UNDER COVER

Click here

17. REMOVE SUSPENSION TOWER DAMPER (w/ Suspension Tower Damper)

Click here

18. REMOVE FRONT LOWER BUMPER ABSORBER

Click here

19. REMOVE FRONT FENDER APRON SEAL LH

Click here

20. REMOVE FRONT DRIVE SHAFT ASSEMBLY

Click here

21. REMOVE NO. 1 EXHAUST PIPE SUPPORT BRACKET (for Lower Side)

Click here

22. REMOVE FRONT EXHAUST PIPE ASSEMBLY

Click here

23. REMOVE NO. 1 EXHAUST PIPE SUPPORT BRACKET

Click here

24. DRAIN ENGINE COOLANT

Click here

25. DISCONNECT NO. 1 RADIATOR HOSE

Click here

26. DISCONNECT VENTILATION HOSE

Click here

27. DISCONNECT PURGE VALVE (PURGE VSV) (for TMMC Made)

Click here

28. DISCONNECT PURGE VALVE (PURGE VSV) (except TMMC Made)

Click here

29. REMOVE NO. 2 SURGE TANK STAY

Click here

30. REMOVE INTAKE AIR SURGE TANK ASSEMBLY

Click here

31. REMOVE AIR SURGE TANK TO INTAKE MANIFOLD GASKET

Click here

32. REMOVE WIRE HARNESS CLAMP BRACKET

(a) Disconnect the air fuel ratio sensor (for Bank 1) connector.

(b) Disengage the hose clamp and 3 wire harness clamps.

*a

Hose Clamp

*b

Wire Harness Clamp

(c) Remove the bolt and wire harness clamp bracket from the cylinder head RH.

33. REMOVE FUEL PUMP PROTECTOR

Click here

34. INSTALL ENGINE HANGER

(a) Install the No. 1 engine hanger to the cylinder head RH with the bolt.

Torque:

43 N·m {438 kgf·cm, 32 ft·lbf}

Item

Part No.

No. 1 Engine Hanger

12281-36020

Bolt

91552-81040

*1

No. 1 Engine Hanger

*2

No. 2 Engine Hanger

(b) Install the No. 2 engine hanger to the cylinder head LH with the 2 bolts.

Torque:

33 N·m {337 kgf·cm, 24 ft·lbf}

Item

Part No.

No. 2 Engine Hanger

12282-31100

Bolt

91671-10825

35. INSTALL ENGINE SUPPORT BRIDGE

(a) Install SST to the vehicle body as shown in the illustration.

*a

Support Shaft

*b

Front Side Member

*c

Cloth

*d

Front Side

*e

Front Suspension Nut

-

-

SST: 09940-10020

CAUTION:

  • Make sure that no oil or grease is on the front side member, and set the support shaft on the level surface of the front side member.

    *a

    Support Shaft

    *b

    Front Side Member
  • The engine support bridge may fall off if any oil or grease is still on or it is installed on the unlevel surface.

NOTICE:

  • Prevent SST from contacting the vehicle body exterior and windshield glass.
  • To prevent damage to the engine hood, place pieces of cloth between the engine hood and SST.
  • Lightly shake SST by hand to make sure it is securely installed before performing work.

(b) Turn the threaded portion of each support shaft to adjust its height until the sub beams are parallel to the ground.

*a

Support Shaft

*b

Sub Beam

*c

Front Side Member

*d

Threaded Portion

(c) Install the chain block to the sling bracket.

*a

Chain Block

*b

Sling Bracket

*c

Fuse Shackle

*d

Shackle (A)

(d) Install the division bar to the chain block with the shackles.

CAUTION:

  • Make sure the fuse shackle is on the chain block side and the shackle (A) is on the division bar side as shown in the illustration so that the fuse bolt is visible and can be checked for deformation easily.

    *a

    Fuse Shackle

    *b

    Shackle (A)
  • If the fuse shackle is installed upside down, deformation of the fuse bolt will not be visible and cannot be used to tell if the load capacity of the engine support bridge has been exceeded. If the load capacity is exceeded, it may cause the engine support bridge to damage the vehicle and the engine assembly with automatic transaxle assembly may fall.
  • Make sure that the fuse bolt of the fuse shackle is free of damage, such as deformation or cracks. If damaged, replace the fuse shackle.

    *a

    Fuse Shackle

    *b

    Fuse Bolt
  • If a deformed fuse bolt is used, it cannot be used to tell if the load capacity of the engine support bridge has been exceeded. If the load capacity is exceeded, it may cause the engine support bridge to damage the vehicle and the engine assembly with transaxle assembly may fall.

(e) Connect the division bar to the No. 1 engine hanger with the 2 shackles (A).

*1

No. 1 Engine Hanger

*2

No. 2 Engine Hanger

*a

Division Bar

*b

Shackle (A)

*c

Chain

-

-

(f) Connect the division bar to the No. 2 engine hanger with the shackle (A) and chain.

NOTICE:

Connect the 2nd link of the chain to the No. 2 engine hanger.

(g) Make sure the distance between the chain block assembly and suspension ring is 120 mm (4.72 in.) or more.

*a

Chain Block Assembly

*b

Suspension Ring

*c

120 mm (4.72 in.) or more

-

-

HINT:

If the suspension height is less than 120 mm, adjust the links of the chain which connect the division bar and engine hanger.

(h) Adjust the position of the support bracket LH and RH so that the length of dimension (A) and (B) are 240 mm (9.45 in.) as shown in the illustration.

*a

Support Bracket LH

*b

Support Bracket RH

*c

Dimension (A): 240 mm (9.45 in.)

*d

Dimension (B): 240 mm (9.45 in.)

*e

Sub Beam

-

-

Front of Vehicle

-

-

(i) Adjust the positions of the chain block assembly, support brackets and main beam so that the chain of the chain block assembly is perpendicular to the main beam and the length of the main beam on the outer side of the support bracket LH and RH is the same as shown in the illustration.

*a

Chain Block Assembly

*b

Main Beam

*c

Dimension (C)

*d

Dimension (D)

*e

Right to Left Adjustment

-

-

CAUTION:

  • To prevent the engine with automatic transaxle assembly from falling, make sure that the length of dimension (C) and dimension (D) are equal.
  • Do not perform any procedures if the length of dimension (C) and dimension (D) are not equal.

    *a

    Main Beam
  • Performing any procedure when the length of dimension (C) and dimension (D) are not equal may cause the engine assembly with automatic transaxle assembly and engine support bridge to fall, possibly causing serious injury.

(j) Confirm the appropriate installation state of the engine support bridge and tighten the 6 wing bolts and 2 bolts.

*a

Wing Bolt

*b

Bolt

Torque:

Bolt :

30 N·m {306 kgf·cm, 22 ft·lbf}

CAUTION:

  • Do not perform any procedures before tightening the bolts to the specified torque.
  • Performing procedures without tightening the bolts to the specified torque, may cause the engine support bridge to fall.

(k) Tighten the chain block assembly until it cannot be moved any further by hand.

*a

Turn

*a

41 N*m (418 kgf*cm, 30 ft.*lbf) or more
  • When suspending the engine with automatic transaxle assembly, do not tighten the chain block assembly more than 41 N*m (418 kgf*cm, 30 ft.*lbf).
  • Tightening the chain block assembly more than 41 N*m (418 kgf*cm, 30 ft.*lbf) will cause the load capacity (400 kg (881.8 lb)) to be exceeded and may cause damage to the engine support bridge and vehicle body.

36. REMOVE FLYWHEEL HOUSING UNDER COVER

(a) Remove the 2 bolts and flywheel housing under cover from the automatic transaxle case sub-assembly.

37. REMOVE DRIVE PLATE AND TORQUE CONVERTER ASSEMBLY SETTING BOLT

(a) Turn the crankshaft to gain access to the 6 drive plate and torque converter assembly setting bolts and remove each drive plate and torque converter assembly setting bolt while holding the crankshaft pulley bolt with a wrench.

HINT:

There will be one black colored drive plate and torque converter assembly setting bolt.

38. SEPARATE FRONT ENGINE MOUNTING INSULATOR

Click here

39. SEPARATE REAR ENGINE MOUNTING INSULATOR

Click here

40. REMOVE FRONT FRAME ASSEMBLY

Click here

41. DISCONNECT NO. 1 TRANSMISSION OIL COOLER HOSE

Click here

42. REMOVE FRONT ENGINE MOUNTING INSULATOR

Click here

43. REMOVE FRONT ENGINE MOUNTING BRACKET

(a) Remove the 3 bolts and front engine mounting bracket from the transaxle housing.

44. REMOVE ENGINE MOUNTING INSULATOR LH

(a) Disengage the clamp.

(b) Remove the nut and separate the engine wire from the engine mounting insulator LH.

(c) Remove the nut and through bolt.

(d) Remove the 5 bolts and engine mounting insulator LH from the vehicle body.

45. REMOVE AUTOMATIC TRANSAXLE ASSEMBLY

(a) Support the automatic transaxle assembly with a transmission jack.

NOTICE:

Secure the automatic transaxle assembly to the transmission jack using a suitable adapter, such as a rope or attachment.

(b) Remove the 11 bolts and automatic transaxle assembly.

NOTICE:

To prevent damage to the knock pins, do not pry between the automatic transaxle assembly and engine assembly.

46. REMOVE ENGINE MOUNTING BRACKET LH

(a) Disengage the transmission breather clamp from the engine mounting bracket LH.

(b) Remove the 4 bolts and engine mounting bracket LH from the automatic transaxle case sub-assembly.

47. REMOVE REAR ENGINE MOUNTING INSULATOR

(a) Remove the through bolt and rear engine mounting insulator from the rear engine mounting bracket.

48. REMOVE REAR ENGINE MOUNTING BRACKET

(a) Remove the 3 bolts and rear engine mounting bracket from the transaxle housing.

49. REMOVE NO. 2 TRANSMISSION CONTROL CABLE BRACKET

(a) Remove the bolt and No. 2 transmission control cable bracket from the automatic transaxle case sub-assembly.

50. REMOVE TRANSMISSION BREATHER SKIRT

(a) Disengage the 3 clamps to separate the transmission breather plug.

(b) Remove the bolt and transmission breather skirt from the automatic transaxle case sub-assembly.

51. REMOVE TORQUE CONVERTER ASSEMBLY

(a) Remove the torque converter assembly from the automatic transaxle assembly.

52. INSPECT TORQUE CONVERTER ASSEMBLY

Click here

53. INSPECT DRIVE PLATE AND RING GEAR SUB-ASSEMBLY

Click here

    Installation
    INSTALLATION PROCEDURE 1. INSTALL TORQUE CONVERTER ASSEMBLY (a) Turn the front oil pump drive gear so that either key is at the top and place a matchmark on the transaxle housing to indicate the po ...

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